Principle Of Operation Of Switched Reluctance Motor Engineering Essay

Principle Of Operation Of Switched Reluctance Motor Engineering Essay 1. INTRODUCTION: From those days the variable reluctance motors had played a vital role in electrical field. These motors are very attractive because they have replaced conventional ac and dc drives in many industrial applications all over the world. Apart from the working they have many advantages such as simple and low cost construction. Since the variable reluctance motor has a high torque with the inertia ratio normal when compared with other motors. Eventually the single head salient synchronous reluctance motors have some advantages which are similar to variable reluctance motor. The cost and performance of the machine is highly dependent on the converter topology. The converter for the machine drive should be very fast accurate current control for better drive performance. In addition to these requirements the machine should produce low volt ampere rating for low cost, should be more reliable and robust with small number of switches producing high efficiency at last. In addition to this all of these converters have greater switching loss and stress because the converters are all operated with hard switching. Now a days soft switching is also implemented for these types of machines. The above mentioned goals can be achieved either by improving the machine design or innovation in the inverter configuration. I hope that my designing deals with the application of a particular type of inverter for the variable reluctance motor drive. 2. VARIABLE RELUCTANCE MOTOR DRIVES: 2.1 CONSTRUCTION: The basic construction of switched reluctance motor is shown in the figure. The construction includes both stator and rotor. It has six pole rotor and eight pole stator in it. The conventional variable reluctance motor that is nothing but the switched reluctance machine has a doubly salient laminated structure which is very simple and robust. The rotor does not contained any windings or conductors within it. 2.2 PRINCIPLE OF OPERATION OF SWITCHED RELUCTANCE MOTOR: To start with the switched reluctance motor, the torque production in the machine is explained with the help of principle of electromechanical energy produced in the coil of the machine. As the rotor rotates, the inductance of the phase windings of a machine varies between the inductance values with respect to the rotor angle. Due to the highly nonlinear magnetic behaviour of the variable reluctance motor, the phase inductance is dependent on the current level as well as with the rotor position. There is also a speed dependent back emf that becomes very large below and above the base speed and dominates the behaviour of the drive. Although the machine has a simple structure, the behaviour of its electromagnetic is obviously convivial. The electrical input energy is given by expression which is displayed as follows; However, the linear inductance of switched reluctance motor model along with back emf. And also the back emf is proportional to the machine speed which is very helpful in exploring the behaviour of this type of drive .The diagram of solenoid coil and the characteristics of the machine is shown as below; For low-speed operating mode, the back emf can be ignored in such a way that these can be compared with the dc bus voltage, and the machine can be assumed as current fed driving machine. Current fed operation is obtained by means of a current regulated pulse width modulation technique. With a proper controller and converter, the phase current should be designed to be close to a square waveform in order to minimize torque pulsations. The back emf increases for the medium speed range machine . To compensate the loss, phase is excited already in designing of the waveform .The machine runs at speed below and above the base speed. Here the back emf is compared and also the emf is even larger than the supply voltage than that of the phase current. Thus the phase current becomes impossible without very large advanced techniques. The phase winding should now be excited before , whereas its inductance value is small in order to develop the sufficient current for a challenging torque. During this mode of operation the phase winding is fed with the voltage and hence the technique is called pulse dropping mode. Even at any suitable power electronic converter or the controller, this type of drive system must maintain the capability of the design for the current pulses to maintain the values of variable reluctance motor accurately. The above mentioned waveforms are executed by simulation method with the help of the mat lab software. The mat lab code for the above mentioned waveform is as follows; 3.MATLAB SIMULATION: 3.1 CODING 1: w=1; k=zeros; d=0; z=zeros; i=0; t=0; e=0.000001; % is the increment of time while (t if t while i z(w)=t; % to store the time values k(w)=i; % to store the current values d=(1/0.1)*(100-(10*i))*e; % is the increment of current i=i+d; % to increase the current t=t+e; % to increase the time w=w+1; % to increase the index of the current and time arrays end while i>=6.5 while i>=6 % to limit the current to a minimum of 6 z(w)=t; k(w)=i; d=(1/0.1)*(-(10*i))*e; i=i+d; t=t+e; w=w+1 ; end end end if t>0.03 z(w)=t; k(w)=i; d=(1/0.1)*(-100-(10*i))*e; i=i+d; t=t+e; w=w+1 ; end if t>=0.0353 break end end plot(z,k,r-,LineWidth,2,Color,black) OBTAINED WAVEFORM: 3.2 CODING 2: v=[]; % an array to store the value of voltages p=[]; % an array to store the value of time c=[]; % an array to store the value of the currents R=1; % resistance value L=0.001; % inductane value fs=1000000; % sampling frequency f1=1000; % switching frequency of the 1st switch f2=142.857; % switching frequency of the 2nd switch d=0.5; % duty cycle t_on=d*(1/f1); % t ON for the 1st switch di=0; n=0; x=0; i=0; t=0; t2=(1/f2); while t while (t n=n+1; v(n)=50; di=(1/L)*(v(n)-(R*i))*(1/fs); i=i+di; c(n)=i; p(n)=t; t=t+(1/fs); end x=x+(1/f1); if (t while t n=n+1; v(n)=0; di=(1/L)*(v(n)-(R*i))*(1/fs); i=i+di; c(n)=i; p(n)=t; t=t+(1/fs); end end end while t>=(0.5*t2) % the second half cycle of the second switch n=n+1; v(n)=-50; di=(1/L)*(v(n)-(R*i))*(1/fs); i=i+di; c(n)=i; p(n)=t; t=t+(1/fs); if c(n) break end end plot(p,v), axis ([0 0.005 -50 55]) hold on; plot(p,c) hold off; Xlabel (Time) Ylabel (Current / Voltage) OBTAINED WAVEFORM: 4.CLASSIFICATION OF SWITCHED RELUCTANCE MOTOR: 5.MODELING AND CONTROL STRATEGIES OF A VARIABLE RELUCTANCE MOTOR: The above block diagram represents the modelling of the variable reluctance motor with their control strategy. The above circuit contains the following blocks such as feed forward compensator, flux or current controller and the driver block. The block also contains the observer. The feedback from the motor or drive is connected to the observer as well as to the feedback compensator. The machine is designed in such a way that it is based on both synchronous and asynchronous type and in this machine the torque control problem can be solved by transforming it into an equivalent current control one. The simple solution is probable because the torque is proportional to the current or to a specific component of the current vector in a proper orientation system. Moreover by considering the wide availability of high-quality and low-cost current transducers the solution obtained is also more convenient from an economical point of view. For the variable reluctance motors the torque versus current function is nonlinear and therefore preventing the simple solution which adopt these drives for standard motors. To prevail over the problem a cascade controller structure which is same as the one proposed earlier has been selected. It consists of an external static feed forward nonlinear compensator which is followed by a nonlinear flux or the current which is selected depending on design choices with the closed-loop controller. In the case of feed forward compensator transforms the torque set point which is corresponding to the flux or current is normal in these cases. The internal closed-loop controller is based on exact or directly measured feedback, depending on the controlled variable selected. Hence the optimization techniques are used for the design of a feed forward pre compensator. The closed-loop controller operates in a stator reference frame thus by avoiding the use of match up transformations. This designing presents the inverter for the motor modelling and control optimization activities. Importance is placed on the optimization techniques used in the design of the feed forward compensator. Finally the work related to the design of the closed loop flux or the current controller is currently in growth. The main report here is that the order to validate the design of the feed forward compensator. Previous to entering into details about the feed forward compensator design, some general considerations are value making in this kind of this design. Direct calculation of a current set point is not suitable because the torque reliance on current must also think about magnetic nonlinearities. Even though the simpler relationship exists between torque and flux the feed forward compensator is designed under the assumption of an internal flux closed-loop controller. But the current is certain in such a way that the flux set point can be directly transformed into a current by means of the model output obtained. It must be pointed out how the planned replica structure would be greatly simplify the design of the torque controller. A critical point is the alteration of the scalar torque demand into a corresponding three-phase flux vector. It can be noted that fluxes qualified to different phases can be bewildered independently by means of the associated control inputs. The control problem thus has as many degrees of freedom as the figure of phases. These degrees of freedom can be used for different purposes such as the four phase motor and the two adjacent phases. These are selected according to the real rotor position and torque signal that are used to impose torque dynamics and ripple-free operation. The remaining two phases are controlled in order to keep their current at zero. For a certain phase motor, the required dynamics is obligatory on motor acceleration by controlling a single phase and thus by selecting as a function of position and torque sign. The left over controls must keep the remaining phase currents at zero or collect them to zero as fast as possible. Both approaches have the similar kind of problems mainly related to the need for a fast switch-on and switch-off of phase currents that impose a voltage waveform that is strongly impulsive. While the voltage is limited in a real power inverter there is an increase in the enduring torque ripple occurs in the machine. Furthermore the solution proposed in during the good dynamic specification of the error between the actual and the desired acceleration does not control the torque ripple explicitly. The approach which is going to be considered in this attempt many degrees of freedom as possible in order to get the best performance from the motor. Thus the modelling would be done in such a way that it gives high efficiency with the low cost production. 6.OVERVIEW OF A VARIABLE RELUCTANCE MOTOR TOPOLOGY: The performance and cost of the variable reluctance motor drive is highly dependent on the topology used to drive the machine. Since the features of Variable reluctance motor drive have been realized the developments in the topologies have proceeded in parallel with the machine design. From those days there have been many topologies invented and while the conventional inverter driven induction machine drive the variable reluctance motor drives havent been made standard . In addition to this the induction motor drives which almost always carry an pulse width modulation voltage link inverter .This method for variable reluctance motor drives seems to be much more application dependent. Ideally the variable reluctance motor drive should meet the following requirements: capability to program a commanded current pulse very quickly and accurately for good drive performance. Low noise and torque pulsation. as low a converter power VA rating as possible for a given drive rating for low cost. low switch/phase ratio. reliability and robustness. high efficiency. Only if all the above requirements are met then only variable reluctance motor drives can be comparable with the conventional inverter driven induction machine drive and other variable speed drives that are present in the market. These topologies discovered up to date and these materials have become popular and it is used in a many of the applications now a days. These configuration design include the asymmetric bridge converter with bifilar winding configuration which will split supply configuration from H-bridge configuration and also from the common switch configuration. The asymmetric bridge converter has an entire current pulse programming power in such a way that the converter is able of apply the full supply voltage across the winding in either directions for the purpose turning the current in each phase that is in on state as well as in off state. Even though the converter faces some difficult from high switch or phase ratio it is normally expensive because the two switches per phase and the associated drive circuit. The winding present in the machine that is the bifilar winding should meet the minimum switch requirement with one switch or the phase ratio. Thus the voltage waveforms resulting from non matching magnetic coupling will increase the switch voltage rating values to twice the value of the voltage and even higher. In addition to the losses such as copper loss which is associated with the auxiliary windings are generally high for many applications. Thus the supply converter topology also meets the minimum switch requirement. And also in this case the phase number must be even and the converter does not ready to tolerate the phase unbalance or the fault in any phase. This is because these fault results in the voltage increase in the capacitor banks. And also the dc bus voltage utilization is poor because only 1/2K is utilized. Thus the H-bridge topology meets the minimum switch requirement. Therefore this reason is suitable for four or multiples of four-phase machines, and it also utilizes only half of the dc supply voltage. In this topology two phases are always on at one time and only one of the two phases are contributing to motoring torque production at any instant time. Therefore, the degradation of the output torque is achieved easily. The common switch design in the machine only requires one more switch in addition to the minimum switch requirement. However this does not tolerate phase overlapping and therefore this leads to its capability and also this is very limited because for the particular reason for the single-pulse mode. Here in this method they have already used C-dump configuration design and this configuration design also requires only one additional switch to the one switch or the phase requirement. The converter utilizes a capacitor to dump the energy of a switch off going phase and a chopper operating with buck principle to discharge the capacitance value. The capacitor voltage is generally maintained at twice the supply voltage value in order to supply negative supply voltage to the off going phase. The converter also has full capability to develop the current pulse during both turn on and turn off condition and also produces high efficiency operation results at the end. The main disadvantages of this converter are the high switching device voltage ratings. The cost of the additional switch of the dump capacitor and inductor also matters finally with the losses associated of the reactive elements. To open new application fields to the variable reluctance motor drives it is clearly necessary to both improve the drive performance at the lower cost. These goals can be achieved either by improving the machine design or creating some innovations techniques in the Inverter which we are going to design. The general circuits for the converter topology are shown as follows; The force production for motoring and regeneration waveforms is shown in the upcoming figure. The forward direction of the motion of the translator is considered as the positive sign. The direction of the motion is considered as positive by assuming the certain phase sequence. While considering the forward direction of the motion they represent the forward motoring operations for their corresponding quadrants. Similarly when we are considering the reverse direction these regions represents the reverse regenerative operation for their quadrants. The duty cycle of each phase is only about 0.34 and their induced emf are constant between x1 and x2.The air gap power and the generating electromagnetic force can be made constant by exciting the stator phases with the wide range of pulse of currents. The one half of the air gap power is saved in the phase windings in the form of magnetic field energy. Then the mechanical power output is formed from the other half of the air gap power. There is the similarities between the reluctance motor and brushless DC motor in terms of current, a ir gap waveforms. Thus the dc machine controller can be used to control the switched reluctance motor for low cost and as well as for high volume applications. 7.ADVANTAGES OF A VARIABLE RELUCTANCE MOTOR: Simple and robust in construction. Low cost due to the absence of rotor windings and magnets due to the use of a small number of concentrated stator coils which is same as the field coils of a dc machine. Low rotor inertia and high torque. Motor phases operate almost independently to each other. The machine has greater economy and reliability. Machine does not need bi directional currents. Suitable for high speed operations. 8.CONCLUSION: Thus I hope that the back ground reading for my project has been done fully with the materials provided by our supervisor as well as with the materials we have collected. Future work is to design an inverter for a variable reluctance motor and build up the hardware kit for the operation. For the above mentioned reason I have gone through back ground reading completed related to the switched and variable reluctance motors. Thus my reason for taking over my project is for both modelling and building the hardware is to simplify the design of the high performance inverter for the machine with high efficiency. Even though different approaches had been overcome to design an inverter the process is carried out to design the material for both rotating and linear machines. Up to date the designing of the material in the laboratory had been performed by simulating using the Mat lab software and coding and waveforms obtained are displayed above in our report.

Viet Nam :: essays research papers

The media has made sure that all of us are aware of the Vietnam conflict. Readers and movie goers the world over are now familiar with America's suffering in Vietnam and the problems American veterans have endured as they attempted to adjust to civilian life. Although all life is irreplaceable, the fact remains that the United States lost fewer than a million men in the Vietnam conflict and their social institutions and infrastructure remained relatively intact. The Vietnamese, however, lost two million men and their culture, society, landscape and tradition were literally obliterated. Despite this destruction, their side of this horrendous story has seldom been told. Worse yet, when it is told, they are often portrayed in the most unattractive of all light. Until only a few years ago, the Vietnamese were portrayed by the media as a faceless people with no identity; entities not worth caring about. The turning point came with the publication, in Dutch, of Duong Thu Huong's Blind Paradise in 1994. This landmark book was followed by Bao Ninh's The Sorrow of War. War novels deal, superficially, with war. But underneath all the blood and horror and carnage lie far deeper social and human issues. The best novels of war, such as Erich Maria Remarque's All Quiet on the Western Front and Ernest Hemingway's For Whom the Bell Tolls, as well as Bao Ninh's The Sorrow of War, also deal with the makeup and morality of a culture or a society gone wrong. The protagonist of these books, whether real or fictional, often endures a harrowing personal struggle through both a public and private hell and usually undergoes some sort of redemption, even if that redemption results in death. Born in 1952, Bao Ninh served in the Glorious 27th Youth Brigade during the Vietnam conflict. Of the five hundred youths who went to war with this brigade in 1969, Bao Ninh was one of its ten survivors, so it is not unusual that war should be the subject of his first book, considering the impact it has had on his life. Semi-autobiographical in nature, the protagonist of The Sorrow of War, Kien, is the lone survivor of his brigade and a ten year veteran of the war. As the book opens he is serving as part of an MIA body collection team. It is through his memories that we slowly learn how the war has devastated his youth and the youth of his countrymen.

Daiwa Case Study Essay

The executive vice president of Daiwa’s New York branch had traded away the bank’s money over 11 years – an extraordinarily long period for such a fraud to run – while using his position as head of the branch’s securities custody department to cover up the loss by selling off securities owned by Daiwa and its customers. The trading loss was one of the largest of its kind in history. But it was the cover-ups by Iguchi over a period of years, and then by senior managers at Daiwa between July 13 and September 18 1995, when the bank eventually reported the loss to the US Federal Reserve Board, that did the real damage. These led to criminal indictments against the bank and its officers and, eventually, to one of Japan’s largest commercial banks being kicked out of the US markets. Unlike Barings Bank, which was swallowed up by similar failures in risk management earlier in the same year, Daiwa’s $200 billion of assets and $8 billion of rese rves meant it was big enough to survive the hit. But punishment by US regulators and public humiliation dealt a massive blow to Daiwa’s reputation. The scandal set in train a longterm change in strategy as Daiwa reigned in its international ambitions and concentrated on its core businesses in Japan and Southeast Asia. There were also long-term per- Lessons learned G Risk-taking functions must be segregated from record-keeping and risk assessment functions. It’s a lesson that’s now been largely learned in terms of segregating traders from the back office – but it has much wider applications; G Structural problems in risk management don’t put themselves right. Daiwa had many warning signals about the way risk management was organised at the New York branch, but chose to believe that local management  had learned its lesson; G Massive fraud can continue for many years in an environment of lax controls: Iguchi made his confession not because he feared he was about to be caught, but instead when he realised that the situation might otherwise carry on indefinitely; G Years after an event, failures in risk management remain a threat to the personal finances of senior executives if the executives can be shown to have acted inappropriately. sonal repercussions for Daiwa’s senior managers. Five years after the debacle broke, on 20 September 2000, in a decision that was immediately challenged, a Japanese court in Osaka told 11 current and former board members and top executives from Daiwa to pay the bank $775 million in damages. The record-breaking award, which followed legal action by shareholders, was to atone for the management failure of oversight, attempted cover-ups, and the breakdown of risk management in the New York branch that led up to the debacle. Treasury securities as part of Daiwa’s services to its pension fund customers. During the 1980s the New York desk became a significant force in the US government debt market and was designated as a primary market dealer in 1986. When Iguchi was promoted to become a trader in 1984, he did not relinquish his back-office duties. All in all, he supervised the securities custody department at the New York branch from approximately 1977 right through to 1995. This lack of segregation, a relatively common feature of small trading desks in the early 1980s but already a discredited practice by the early 1990s, led to Daiwa’s downfall. Daiwa’s New York branch managed the custody of the US Treasury bonds that it bought, and those that it bought on behalf of its customers, via a sub-custody account held at Bankers Trust. Through this account, interest on the bonds was collected and dispersed, and bonds were transferred or sold according to the The Story Toshihide Iguchi, a Kobe, Japanborn US citizen who majored in psychology at Southwest Missouri State University, Springfield, joined Daiwa’s New York branch in 1977. There he learned how to run the small back office of the branch’s securities business. Opened as an office in the 1950s, the Daiwa New York branch began dealing in US  wishes of either customers or the bank’s own managers. Daiwa and its customers kept track of what was happening in this account through transaction reports from Bankers Trust that flowed through Iguchi, in his role as head of the back office. When Iguchi lost a few hundred thousand dollars early on in his trading activities, he was tempted into selling off bonds in the Bankers Trust sub-custody account to pay off his losses. Then, in the words of the FBI agents who investigated the case: â€Å"He concealed his unauthorised sales from the custody account †¦ by falsifying Bankers Trust account statements so that the statements would not indicate that the securities had been sold.† As he lost more money trying to trade his way back into the black, it became hard work keeping alive this parallel series of reports. But luckily for him, Daiwa and its internal auditors never independently confirmed the custody account statements. Later on, while he served his sentence, Iguchi was asked by Time magazine whether his early actions felt like a crime. â€Å"To me, it was only a violation of internal rules,† he said. â€Å"I think all traders have a tendency to fall into the same trap. You always have a way of recovering the loss. As long as that possibility is there, you either admit your loss and lose face and your job, or you wait a little – a month or two months, or however long it takes.† In Iguchi’s case it took 11 years, during which time he is said to have forged some 30,000 trading slips, among other documents. When customers sold off securities that Iguchi had, in fact, already sold off  on his own behalf, or when customers needed to be paid interest on long-gone securities, Iguchi settled their accounts by selling off yet more securities and changing yet more records. Eventually about $377 million of Daiwa’s customers’ securities and about $733 million of Daiwa’s own investment securities had been sold off by Iguchi to cover his trading losses. As Iguchi’s apparen t success grew – he later said that at one point his desk  produced half the New York branch’s nominal profits – Subsequent investigation showed that risk control lapses and cover-ups were part of the culture of Daiwa’s New York operation in the 1980s and 1990s’ According to the charges laid against the bank by US officials, Daiwa had gone so far as to â€Å"temporarily relocate certain traders †¦ and, when necessary, to disguise the trading room at the downtown office as a storage room during [regulatory] examinations†. Following a regulatory rebuff in 1993, the bank had assured regulators that traders would no longer report to Iguchi while he occupied his role as head of the securities custody department. In fact, the branch continued to operate without a proper division of responsibilities. Furthermore, during the 1995 investigation, Iguchi revealed that between 1984 and 1987, other Daiwa traders had suffered major losses; these had apparently been concealed from regulators by shifting the losses to Daiwa’s overseas affiliates (FDIC, 1995). he became something of a golden boy at Daiwa. But the losses accumulated until by the early 1990s it was difficult for Iguchi to continue to hide them, particularly after 1993 when Daiwa made some limited efforts to split up its trading and back-office functions. Yet he managed to survive for another two years before engineering his own day of reckoning. Iguchi’s survival wasn’t entirely down to luck. Subsequent investigation showed that risk control lapses and cover-ups were part of the culture of Daiwa’s New York operation in the 1980s and early 1990s, to a farcical degree. For example, during the 1995 investigation of the Iguchi affair, the bank was also charged with operating an unauthorised trading area for securities between 1986 and 1993. Confession and cover-up In Iguchi’s confessional letters to Daiwa in mid-summer 1999 (he sent a stream of letters and notes to the bank after that initial July 13 letter) the rogue custody officer suggested that his superiors keep the losses  secret until â€Å"appropriate measures† could be taken to stabilise the situation. It was a suggestion that was taken up. In the period after July 13 and before about September 18, when Daiwa belatedly advised the Federal Reserve Board of the loss, certain of Daiwa’s managers connived with Iguchi to prevent the losses being discovered, despite a legal requirement to report misdoings immediately to the US regulators. For example, during September 1995, Iguchi was told to pretend to be on holiday so that a scheduled August 2001 audit would have to be postponed; he was in fact in the New York apartment of a Daiwa manager helping to reconstruct the trading history of his department. Daiwa’s managers seem to have been hoping to transfer the loss to Japan, where it could have been dealt with outside the scrutiny of the US regulators and markets. After Daiwa told regulators about the loss on September 18, Iguchi was taken to a motel and questioned directly by the US Federal Bureau of Investigation. He told FBI agents about what had gone on in the months following his initial confession to Daiwa, and the bank was shocked to find itself facing a 24-  count indictment for conspiracy, fraud, bank exam obstruction, records falsification and failure to disclose federal crimes. Daiwa argued, rightly, that not a single customer of the bank had lost any money. At the time of the incident, Daiwa was one of Japan’s top 10 banks and one of the top 20 banks in the world in terms of asset size. Like most other Japanese, and some European, banks, it had massive â€Å"hidden profits† on its balance sheet that were not accounted for due to the legitimate historical accounting method that it employed. That gave Daiwa’s management considerable freedom of action if unex- Timeline of events July 13, 1995 Toshihide Iguchi of the New York branch of Daiwa Bank confesses  to superiors that he has lost $1.1 billion over 11 years while trading US Treasury bonds. August 8 Japan’s ministry of finance is informed about the scandal by Daiwa. September 15-18 Daiwa belatedly reports the loss to the US Federal Reserve Board, warning that immediate disclosure of a loss of that magnitude might threat the financial viability of the bank. September 23 Iguchi interviewed at a motel by FBI agents who later arrest him. September 26 Iguchi fired by Daiwa and the extent of the bank’s loss made public. October 2 US authorities order Daiwa to put an end to most of its trading in the US, having already shocked the bank by indicting it on serious charges. December 1996 Iguchi sentenced to four years in prison and a $2.6 million penalty (fine and restitution payments). End January 1996 Daiwa agrees to sell most of its assets and offices in the US. February 1996 Daiwa agrees to pay a $340 million fine to avoid further legal battles over its institutional role in the Iguchi affair – one of the largest ever fines in a criminal case in the US. 20 September 2000 Osaka court says some current and some former board members and executives from the bank must pay the bank $775 million as restitution to shareholders. The board members and executives immediately appeal against the decision. One of the bank’s crisis management actions after Iguchi confessed was to pump back into the defrauded account securities equivalent to those that their New York head of custody had sold off. But the US regulators were deeply unhappy at the attempted coverup, and at the way Daiwa had seemed to ignore regulatory warnings over a number of years. They were also unhappy that at least one senior member of Japan’s ministry of finance knew about the Daiwa scandal in early August and had not informed his US regulatory counterpart. This pushed the Daiwa scandal onto the international political stage and led to a telephone conversation in which Japan’s finance minister, Masayoshi Takemura, was obliged to make apologetic noises to US Treasury secretary Robert Rubin for his staff’s failure to pass on the information. (The call was made only after Takemura had annoyed US officials by denying at an earlier press conference that his ministry had failed in its duties; his aides later denied that any formal apology had been made to Rubin.) At a time when the Japanese banking system was already showing signs of strain from the slowing Japanese economy and deteriorating  asset quality, many international regulators took the Daiwa scandal and its aftermath as a sign of the continuing lack of openness in Japanese banks and the Japanese financial system. Meanwhile, Daiwa faced more immediate problems. In November 1995, the Federal Reserve ordered it to end all of its US operations August 2001  within 90 days. By January 1996, Daiwa had agreed to sell most of its assets in the US, totalling some $3.3 billion, to Sumitomo Bank and to sell off 15 US offices. (Indeed, for some time after the debacle, Daiwa was rumoured to be on the verge of merging with Sumitomo.) In February 1996, Daiwa agreed to pay a $340 million fine – a record amount for a criminal case in the US – as a way of laying to rest the charges that US authorities had brought against it. All in all, it endured some of the stiffest punishments ever meted out to a foreign bank operating in the US. By this point, senior figures at the bank had resigned or indicated they would take early retirement. Top management said it would cut its own pay for six months and forgo bonuses as a sign of contrition. Iguchi’s nightmare was now dissipating. In October 1995, he had reached an agreement with his US prosecutors and admitted misapplication of bank funds, false entries in bankbooks and records, money laundering and conspiracy. Iguchi told the judge at early hearings that by the time he confessed: â€Å"After 11 years of fruitless efforts to recover losses, my life was simply filled with guilt, fear and deception.† He said he sent the confession letter because he couldn’t see that anyone other than himself was likely to bring the situation to an end. In December 1996, he was sentenced in New York to four years in prison and a $2.6 million penalty that he had little chance of paying. The cover-up also led to one of Iguchi’s managers being sent to prison for a number of months and fined a few thousand dollars. The Aftermath As this account makes clear, Daiwa’s 1995 debacle resulted in huge losses; a  criminal charge against the bank; Daiwa’s forced exit from US markets; general reputational damage to Japanese banks and regulators; senior resignations at Daiwa; and a diplomatic spat between the US and Japan. In the medium term, the scandal led indirectly to Standard & Poor’s downgrading Daiwa’s credit rating from A– to BBB, and to Japan’s ministry of finance imposing certain restrictions on the bank’s activities for a year or so. It also temporarily threatened the credibility of its profitable trust business. In the longer term, the scandal obliged Daiwa’s management to refocus the bank on its traditional retail and trust banking units. By 1998, this refocus – and the general malaise in Japanese banking – led Daiwa to announce that it would close down many of its international offices to concentrate on its role as a super-regional ba nk in Southeast Asia, with a specific focus on the Osaka region. Bank executives at the time of the scandal in 1995 found that it dogged them into the new millennium. On 20 September 2000, the BBC reported that a Japanese court had ordered 11 current and former board members and executives from the bank to pay the bank $775 million in damages, much of it awarded against the president of Daiwa’s New York branch during the Iguchi period. Judge Mitsuhiro Ikeda made it clear that the award was compensation to the bank’s shareholders for the fact that â€Å"the risk management mechanism at the [New York]  branch was effectively not functioning†, as well as for management’s failure to report the incident promptly, and failures in oversight. Some commentators were surprised by the size of the recordbreaking award, however, and the executives immediately appealed against the decision and filed pleas with the court to suspend any seizure of their assets. Whether or not the award stands, many commentators at the time said that it marked a broader change in attitudes about executive and board responsibility. In Japan, as in most developed economies, it is becoming more and more likely that senior management in charge of a bank or corporation at the time of a disaster will be held personally accountable. I This case study was written by Rob Jameson, ERisk Web Resources AsiaWeek, â€Å"Japan’s $1-Billion Scam†, October 27, 1995 BBC News, â€Å"Bank Bosses Pay $775m Fraud Charge†, 20 September, 2000 Electric Law Library, Criminal Complaint and Indictment Against Daiwa Bank, 11/95 FDIC press release: Regulators terminate the US operations of Daiwa Bank, Ltd, Japan, PR-67-95, November 11, 1995 Time magazine, â€Å"A Blown Billion†, October 9, 1995 Time magazine, â€Å"I Didn’t Set Out to Rob a Bank†, short interview with Iguchi, February 1997

Readiness to implement of alternative source of energy in the hotel sector - Free Essay Example

Sample details Pages: 32 Words: 9573 Downloads: 1 Date added: 2017/06/26 Category Statistics Essay Did you like this example? Chapter 1 Introduction 1.0 Introduction Hotels constitute a key element of the organized chain of activity in the travel and tourism industry, and occupy a crucial place in concerns over environmental protection related to tourism and travel. The hotel industry, because of the nature of its functions, characteristics, and services, consumes substantial quantities of energy, water, and non-durable products. It has been estimated that most environmental impacts created by the hotel industry can be attributed to site planning and facility management; excessive consumption of local and imported non-durable goods, energy, and water; and emissions into the air, water, and soil (APAT 2002; Mensah 2004; Trung and Kumar 2005).. Don’t waste time! Our writers will create an original "Readiness to implement of alternative source of energy in the hotel sector" essay for you Create order 1.1 Problem Statement Integration of renewable energy sources into hotel operations is perceived as the most promising form of crisis mitigation. There are two types of energy: renewable which is infinite and non-renewable which will run out in the future. Alternative energy includes wood or biomass, wind energy, solar energy, fusion and hydropower. Non-renewable energy includes fossil fuels, coal, geothermal power and nuclear fission. Even if with many promising alternative energy sources, hoteliers remember that conservation is the key to efficient energy use, no matter what the source of the energy may be. Energy consumption in hotels is among the highest in the non-residential building sector in absolute values. Available specific information on the energy characteristics, thermal performance, energy losses, electric loads, and comfort conditions play significant role for the sustainable development of hotels systems. During the past years, there has been rising interest, there has been increasing int erest, in the use of the concept of energy. The use of renewable sources in energy production with the need to promote sustainable tourism, provide energy-based amenities for tourists, and ensure environmental protection, and it focuses on solar power, wind power, the power of running water and biomass, the power of biofuel for motor vehicles, and biothermal energy. We are in an alarming situation in Mauritius whereby there is an increase in the arrival of tourist. The hotels sector has expand a lot with new hotels constructed. Moreover, due to that increase of tourist in hotel meaning that there is indirectly and directly an increase in the level of energy consumption. The increase in the energy consumed is having an impact upon the environment, hence hoteliers are now trying to find a solution to prevent environmental degradation. There is a need in using alternative source of energy in order to reduce their consumption and also to reduce their cost. Aims Objective of Study The aim is to analyse the alternative source of energy use in hotels and how it can be implemented with the following objectives: To analyse to which extent hotels are aware of alternative energy Assessing the alternative source of energy of hotels To assess how far the hotels are ready to implement alternative source of energy Evaluate the barriers in implementing alternative energy in hotel CHAPTER 2 LITERATURE REVIEW 2.0 Introduction In light of global climate change, issues of energy consumption in the international tourism industry have been receiving increased attention. In recent years, the tourism literature has increasingly recognized energy as an important issue. In particular, G ÃÆ' ¶ ssling et al (2005, p. 418) state: the use of fossil fuels and related emissions of greenhouse gases is, from a global point of view, the most pressing environmental problem related to tourism. The hotel sector has also been recognized as a key contributor of greenhouse gas emissions ( Warnken et al , 2004 ; Becken, 2005 ; Scott et al , 2007 ), research such as that conducted by Becken (2005) suggests that this has not typically been a major environmental concern for   tourism stakeholders. Moreover, a major concern among the hoteliers are to adapt new strategies in implementing alternative sources of energy which will help in reducing their consumption of the actual energy which is relatively high and costly. As such, Becken (2005) argues that energy has not been a major environmental concern for tourism stakeholders. 2.1 Consumption of energy by the Hotel Sector Energy has long been considered a component of environmental sustainability in tourism. For example, the environmental sustainability principle of the International Ecotourism Standard specifies that ecotourism products should minimize energy consumption, maximize energy efficiency, and implement procedures to train staff and provide relevant information to guests   ( Green Globe, 2004 ). Hotels are among the most energy-intensive compo ­nents of the tourism industry, representing essential tourist services and an important source of employment. As such In tourisms early stage, most of the energy was used to provide lighting inside and around buildings, and to provide heating. Energy was also used in storing and preserving foodstuffs, preparing and serving food, and for sanitary purposes (for bathroom facilities, laundries). Recently, the consumption of energy used in air-conditioning or for the needs of various auxiliary facilities (swimming pools, saunas, lounges) has grown considerably. About one third of all energy consumed is used in guest rooms (30 percent of total consumption of electricity, 36 per cent of total energy used in heating, ventilating and air-conditioning, and 34 per cent of total water consumption). In this situation Energy is a key precondition to tourism processes. At a final-product level, electrical energy and heat power are the forms of energy most commonly used, while mechanical energy and solar and wind power are used substantially less. 2.2 Energy sources All other forms of energy belonging to the second group are nonrenewable: fossil fuel (coal, crude oil and natural gas), nuclear power, the Earths internal heat energy released on its surface (hot springs), the Earths internal heat energy that is renewed in its interior through the radioactive decay of uranium and thorium, and light atoms that are needed for fusion to take place. These nonrenewable forms are finite energy sources, and their duration depends upon the intensity with which they are exploited. Coal is the primary energy source of fossil fuels, and its combustion releases great quantities of carbon dioxide into the atmosphere. From an ecological viewpoint, this represents the pivotal problem of using fossil fuels, because CO2 and other emissions impact on the environment and pollute the atmosphere through greenhouse gasses. At the same time, the era of cheap fossil fuel has come to an end, and newly awoken concerns about fossil fuel security have further made dependency on them less desirable. In addition, the mean annual temperatures are predicted to rise in the order of 1.20-7.07à ¢Ã¢â‚¬â€Ã‚ ¦C between 2070 and 2099, further exacerbating the problem (Mimura et al. 2007). The prevalence of fossil-fuel generated power and the (still) marginal utilisation of renewable energy resources translate into significant emissions of particulates, nitrogen and sulphur oxides and other air pollutants, both locally and globally. Secondary pollution in the form of acid rain causes the acidification of lakes and soils, with negative effects on flora and fauna, human health and man-made structures and products. The decades of cheap fossil fuel did little to help promote the technology and subsequently it was not until the late 1990s that renewable International Journal of Sustainable Energy 95 energy gained new momen tum in the energy agendas of local governments and international organisations alike. The four principal strategies for reducing greenhouse gas emissions in accommodations include: reducing overall energy use, improving energy effi ciency, increasing the use of alternative energy sources and offsetting emissions through the development of renewable energy projects or the planting of trees to act as carbon sinks ( ÃÆ'– n ÃÆ' ¼ t and Soner, 2006 ; Becken and Hay, 2007 ; Dalton et al , 2007 ; Scott et al , 2007 ;UNWTO, 2007a ). 2.3 Alternative sources of energy 2.3.1 A solar thermal collector A solar thermal collector is a solar collector considered to bring together heat by absorbing sunlight. The word is useful to solar hot water panels, but can also be used to denote more difficult installations like solar parabolic, solar trough and solar towers or easier installations such as solar air heat. The more multifaceted collectors are normally used in solar power plants where solar heat is used to generate electricity by heating water to fabricate steam which drives a turbine connected to an electrical generator. The simpler collectors are typically used for supplemental room heating in residential and commercial buildings. A collector is a tool for converting the energy in solar radiation into a more functional or storable form. The energy in sunlight is in the form of electromagnetic radiation from the infrared (long) to the ultraviolet (short) wavelengths. The solar power striking the Earths surface depends on weather conditions, as well as location and direction of the surface, but in general it averages about 1,000 watts per square meter under lucid skies with the surface straight perpendicular to the suns rays. 2.3.1.1 About Parabolic Trough Solar Trough solar systems use parabolic rounded trough shaped reflectors center the suns power onto a receiver pipe running at the focus of the reflector. Because of their parabolic shape, troughs can focus the sun at 30-60 times its usual intensity on the receiver pipe. The intense energy heats a heat transfer fluid (HTF), typically oil, flowing through the pipe. This fluid is then used to produce steam which powers a turbine that drives an electric generator. The collectors are united on and east-west axis and the trough is rotated to follow the sun to make best use of the suns energy input to the receiver tube.   Heat transfer fluid (usually oil) runs through the tube to absorb the concentrated sunlight. This rises the temperature of the fluid to some 400 °C. The heat transfer fluid is then used to heat steam in a normal turbine generator. 2.3.2 Biogas Biogas can bring a spotless, effortlessly controlled source of alternative energy from organic waste materials for a small labour input, replacing firewoood or fossil fuels (which are becoming more expensive as supply falls behind demand). During the conversion process pathogen levels are diminished and plant nutrients made more willingly available, so better crops can be grown while accessible resources are preserved. Since small scale units can be moderately simple to build and function biogas should be used openly if possible (for cooking, heating, lighting and absorption refrigeration), since both electricity generation and density of gas (for storage or use in vehicles)use large amounts of energy for a small output of functional energy. This idea is suited to distributed systems where waste is treated close to the source, and mud is also reused locally,to reduce transport and primary capital cost compared to a centralised system. As the distributed system will need a sustain network, biogas contributes to the triple bottom line; benefiting the environment, reducing costs and contributing to the social organization. This kind of biogas consists mainly methane and carbon dioxide. Other types of gas generated by use of biomass are wood gas, which is formed by gasification of wood or biomass. This type of gas consists mainly of nitrogen, hydrogen, and carbon monoxide, with little amounts of methane. Biogas may be used as a low-cost fuel in the hotel industry for any heating function, such as cooking. It may also be used in present waste management amenities where it can be used to run any type of heat engine, to produce either mechanical or electrical power. Biogas can be compacted, like natural gas, and used to power motor vehicles and in the UK for example is estimated to have the potential to replace around 17% of vehicle fuel.   Biogas is a renewable fuel, so it qualifies for renewable energy subsidies in a few parts of the world. 2.3.3 Biomass Biomass, a renewable energy source, is organic material from living, or freshly living organisms such as wood, waste, hydrogen gas, and alcohol fuels. The biomass- energy- materials technology (Pinatti, 1999)à ¢Ã¢â€š ¬Ã¢â‚¬ better known by its BEM acronymà ¢Ã¢â€š ¬Ã¢â‚¬ uses acid pre-hydrolysis in a vacuum reactor in order to separate municipal solid wastes into two fractions. Biomass is commonly plant matter grown to generate electricity or generate heat. In this way, organic biomass can be integrated, as plants can also engender electricity while still alive. The most conservative way in which biomass is used however, still relies on direct incineration. However, it is possible to use biogas tapped from existing dumps and resulting in nil fuel costs, and either select or compatibilize technologies for upgrading the use of future municipal solid wastes, also with negative fuel costs, or opportunity cost of waste function Vollebergh (1997), based on the amount of garbage that wil l not disposed in dumps. Forest organic residues for example (such as dead trees, branches and tree stumps), yard clippings, wood chips and rubbish are often used for. Biomass also includes plant or animal matter used for production of chemicals. Biomass may include recyclable wastes that can be use to burn as fuel. However, it excludes such organic materials as fossil fuels, which have been altered by geological processes into substances like petroleum.. 2.3.4 Flat plate collectors Flat plate collectors, developed by Hottel and Whillier in the 1950s, are the most common type known still now. They consist of (1) a dark flat-plate absorber of solar power, (2) a transparent cover that allows solar energy to pass through but reduces heat losses, (3) a heat-transport fluid (air, antifreeze or water) to remove heat from the absorber, and (4) a heat insulating backing. It contain of a slight absorber sheet (of thermally stable polymers, aluminum, steel or copper, to which a black or selective coating is applied) often backed by a grid or coil of fluid tubing placed in an insulated casing with a glass or polycarbonate cover. Most air heat fabricates and some water heat manufacturers have a completely swamped absorber consisting of two sheets of metal which the fluid passes through. The heat exchange part is greater than they may be slightly more efficient than usual absorbers. 2.3.5 Hydro Using water force as a source of energy is not new method. Some countries, such as Canada, are dependent upon on hydro power. Clearly, the availability is restricted to specific region. And to make competent use of hydro power, the scale must be enough. While the contribution of hydro is important, it is not expected to belong to the main flow in terms of aggressive growth of green energy on a global basis (Halldo ´rsson and Stenzel, 2001). 2.3.5 Geothermal Earth heat source on the 9000 degrees Farenheit inner earth hotness and steadily reduces in temperature closer to the surfaces, but the temperature close to the surface vary greatly. Rainwater that sips in deeper parts of the earth gets hot and is known as geothermal source. In several parts of the world this water finds its means back to the surface via cracks and faults, such as geysers (i.e. in Iceland) and boiling springs. As with solar energy, the matter is how to tap that virtually unlimited spring of green energy. In most cases the trick is to bore to find and get access to the geothermal basis. The hot water can then be used both straight and in geothermal power plants, which consists of three varieties. Steam can directly be used to produce electricity with a dry steam generator. Water among 300-700 degrees Farenheit can be used in a Flash Power Plant, where hot water is flashed into vapor, Water with a warmth as low as 220 degrees Farenheit can be used in a Binary Power Pla nt, where the hot water in some way produces steam from a fluid with a lower boiling peak using warmth exchangers. The used water is fed back into the basis for reheating. It is renewable in a sense, as the obtainable heat capacity has its limits. Currently, the universal capacity of geothermal power plants is over 9000MW. The energy cost of easy access geothermal energy power plants is similar to wind energy. An MIT study showed that it is possible to increase the capability in the US alone to at least 100,000 MW, requiring a speculation of up to US$1 billion. It is analogous to drilling for oil; the more you want, the more hard (expensive) it is to find the sources. Clearly, geothermal energy can become a major provider to the worlds energy needs on the long term. Geothermal power plants can regulate the output to the required requests, which is a important advantage and makes them very suitable for base load power (the amount of energy that is always desired). 2.3.6 Tidal Energy If there is one thing we can safely forecast and be sure of on this planet, it is the coming and disappearing of the tide. While the energy capacity is dependable, converting it into electrical power is not simple. One option is to construct a tidal barrage (contrast to hydro lakes) which are not only complex but also cause radical changes to the currents in the estuary that could have enormous effects on the ecosystem. Nonetheless, tidal barrages have a enormous potential, worthwhile further examination. Another option is to use offshore turbines that work analogous to wind parks, but underwater and using the tides as a basis, This technology brings no environmental issues, but as it is in an early stage, the cost is not yet aggressive (like wind energy in the premature days). 2.4 Energy Audit To determine energy performance of a building, both constructional elements and energy production and consumption systems need to be evaluated. Depending on the purpose of the building aforementioned elements and systems have different contribution and a various methodology is needed for precise energy performance calculation. Energy audit is an analysis of thermal performance and energy systems of building with the purpose to determent its energy efficiency or non-efficiency. Energy audit also helps getting new conclusions and suggestions on how to increase the energy efficiency. Main goal of energy audit is to access and process collected data, and to get as much accurate present energy performance of building, concerning construction characteristics in terms of thermal protection, quality and efficiency of heating, ventilation and cooling systems, quality and efficiency of lighting and household   appliances and building management. .   For example Large-scale tidal energy production has been planned for Passamaquoddy Bay straddling New Brunswick and Maine, and the Bay of Fundy as at least the 1930s. Even the late American President John F. Kennedy, a winner of a large-scale barragestyle tidal power plan at Quoddy, envisioned a fossil-fuel-free energy future on the Atlantic seaboard. Newer tidal current technologies offer much more energy generation possibility, and much less environmental trouble, than the impoundment schemes superior in earlier plans. 2.5 Barriers to implement alternative sources of energy The need for using alternate sources for energy has been progressively rising as the environment is getting worse due to human utilization. For those people who wish to make dissimilarity in their lifestyles, or want to help find better energy sources for everybody, there are government allocations that will provide the financial support to do rising energy costs are finally starting to force global leaders to research alternatives and provide the funding to make changes. 2.5.1 Solar water heating systems (SWHS) Problems such as malfunctioning pumps, leakage from tanks etc. were experienced and maintenance and repairing facilities may not be to the required level. However, individual users in direct contact with manufacturing companies were generally satisfied. But this was true for only new systems. An encouraging response came from the potential users; 90% in the cities were willing to buy if it saved them energy. But current high prices of the system were a deterrent to them. Although solar water heating systems are simple in construction, responses indicated that minor faults could lead to serious problems, especially if not detected early. It was found that many systems did not perform as expected due to reasons such as low level of awareness, technical problems and lack of maintenance. It was also revealed that due to unsatisfactory performance, credibility of SWHS was low and there was an urgent need to restore the confidence of both existing and potential users. SWHS are still not pe rceived as environmentally attractive and potentially economical means of providing hot water to targeted users. Therefore, serious efforts and corrective measures both from industry and government are needed for a sustained growth of SWHS market. The key stakeholders (users, manufacturers and experts) indicated that the economic / financial barriers are the most important barriers for SWHS industry. The SWHS were considered high priced compared to conventional water heating systems and electricity made it further unattractive for the low bill electricity consumers. A lack of credit facilities was another obstacle in this category. Awareness / information barriers were ranked second with stakeholder indicating these as most important. Presence of SWHS industry can hardly be noticed by consumers. Industry on the other hand offers very limited choices due to a lack of significant market. Technical barriers were ranked third with stakeholders indicating these as most important. However, some experts and users were of the opinion that technical barrier would have been ranked first if the SWHS were used more widely. SWHS manufacturers on the other hand argued that the lack of knowledge about the system design and operation, and a lack of maintenance were the root cause of the problem. The quality of the product has improved in the last three years. 2.5.2 Recommended actions to remove SWHS barriers The Following measures were recommended by the stakeholders to remove the barriers. Information and awareness Development of effective public awareness and promotion programs that are prepared based on market surveys and studies. It was proposed that the programs should concentrate on use of media especially TV and newspapers. The concept, the benefits and the required operating conditions for SWHS should be made clear to end-users through these media strategies. Promotion of SWHS could also be done through participation in various exhibitions held in syndicates, hotels, clubs etc. The demonstration systems can be set-up in places like city councils, clubs, big factories, conference halls, and stadiums etc. where the impact can be far reaching. Printed materials (such as leaflets, brochures) containing information on systems, selection criteria, maintenance requirements, and information about suppliers and their after sales services needs to be made available to the consumers. ther modes for awareness building could include seminars and presentation to targetted users in schools, universities and clubs, and awareness among students by setting up of laboratories in these places. Economic and financial Financial support from the governmental, private sectors and donor agencies to the SWHS needs to be put in place. Availability of credit facilities with low interest rates and reduction in SWHS prices to make it competitive with other alternatives is equally important. Encouraging local manufacture of SWHS by reducing taxes and customs duties on solar water heating system components. Financial and technical support to research and development activities for product improvement should also be provided Technical Current manufacturing standards and specifications should be revised to include quality control and assurance components and installation requirements. SWHS and their spare parts could be made available in shops and markets.   This should be accompanied with availability of maintenance centres within easy reach. A program or mechanism to address the problem of the systems already installed in the new cities needs to be prepared and implemented. Relevant government authorities, manufacturers and dealers of SWHS need to co-operate in this programme. The users of the system need to be made aware o f the maintenance requirements of the SWHS through the program. Formulation and enforcement of appropriate quality checks at the factory level, product quality and performance guarantee and mechanism for their enforceability , and setting up maintenance cum marketing centres for SWHS are other measures to increase their penetration. Institutional A federation, union or society, which can bring representatives of users, companies, financing sources, policy makers and researches on one platform can be very useful to co-ordinate efforts in this area. 2.5.3 PV (photo voltaic) systems for electrification There was a consensus that economic and financial barriers are the most important barriers and should be addressed first. This was followed by policy barriers, indicating need for a governmental mechanism to promote PV technology (Ahmad and Shenawy, 2006). Market barriers were considered next in importance, indicating small size of the market and limited access to international market. Private sector involvement was limited due to small size of the market. Some PV manufacturers even suggested the need for obligatory laws for rural electrification using PVs. While experts and users considered technical problems and availability of maintenance as an important barrier, PV manufacturers did not consider this as a barrier. Important barriers within these categories were as follows: Lack of information The awareness on the applications of solar PV systems is very low. High dissemination costs The target group for solar electrification lives in dispersed rural dwellings, and proportion of wealthy households is also low in these areas. Dwellings are far apart, and therefore the transaction costs for commercial dissemination, installation and after-sales services are very high. These costs are estimated to be about 30% of the total costs of PV systems. Unfavorable tariff system The tariff charged by utilities does not reflect the real cost of rural electrification. Tariffs for electricity are identical in rural and urban areas, although the cost of supplying electricity is much higher in the countryside. On the other hand, consumers with low consumption of electricity pay lower tariffs. This makes PV system uncompetitive with the grid electricity. PV system is also not able to offer the range of services that a grid can offer, making it further uncompetitive. The electricity tariffs do not include external costs (environmental costs) due to use of fossil fuels in electricity generation. If these costs are considered in tariff setting, PV systems could be competitive with traditional electricity sources. Taxes and duties As in many other developing countries, PV system is considered a luxury product and charged very high import duty. Sometimes, tax exemptions may be available for equipment imports for a public or NGO project. But this inhibits commercialization. Further, the components that are produced locally (such as charge regulators, and batteries), attract high duties to protect the market for local manufacturers. This can cause problems if technology with the local manufacturer is not reliable. Import of equipment and materials is also a problem due to foreign exchange constraints. 2.5.3.1 Actions to overcome the PV electrification barriers The solar PV systems still have opportunities and potential for contribution to the rural development programs. These include the following: Solar radiation is high in Tropical Island, making solar PV system operation quite reliable and attractive. Technical and technological experiences are available. The actions to overcome the barriers include the following; Awareness campaigns need to be launched on regular basis to bring out the potential merits of PV systems and applications. Financial schemes need to be designed to support buyers. Manufacturers, suppliers, and agents should have their representatives and centres near the consumers. Since the PV programme is in initial stage, government supported market incentives needs to be designed to encourage commercial development and deployment. PV rural electrification projects can be integrated with other development programs. Integration of various PV rural electrification projects can help sharing of experiences in barrier removal. 2.5.4 Large Biogas Plants (LBP) The barriers identified in the case of LBP are: Information and awareness barriers A lack of awareness on LBPà ¢Ã¢â€š ¬Ã… ¸s positive economic and environmental impacts Absence of governmental support for development, awareness and dissemination of the technology, necessary in the early stages of such programs. Institutional barriers Lack of co-operation and communication between the involved institutions, organisations and other stakeholders. Absence of NGOs role Economic and financial barriers Competing petroleum products and electricity are subsidized and easily available. High capital costs of LB P compared to other organic waste treatment systems. There is no economic evaluation for the positive environmental impact of the LBP. Unavailability of land within the targeted sites. Policy barriers A lack of application of environmental laws. Moreover, due to the high revenue generated by the states upon energy provided by the states electricity central, it is very difficult to implement alternative or renewable energy. 2.5.4.1 Actions to overcome the LBP barriers Since the LBP programme is in initial stages, most of the action needed relates to formulation of a proper plan and setting up implementing agencies, and ensuring co- operation between various agencies involved in the programme. The actions may include; Awareness programmes bringing out benefits of LBP as a source of clean energy and provider of environmental benefits through waste treatment. Reforming energy pricing policy to encourage and make RETs competitive with petroleum fuels and electricity. Setting up financing mechanisms to provide financing at reasonable rates of interest. Carrying out market potential study. Setting up a coordinating committee for planning and implementing the national action plan as suggested above for LBP. Strengthening the co-operation between the concerned ministries, institutions and organisations involved in the programme. Encouraging NGOs role in promoting LBP technology. 2.6 Direct and Indirect Impacts Social and environmental impacts of SWHS Energy saved by renewable energy technologies was estimated to be about 65%.   Estimated annual reduction in CO2 emissions is 190 thousand tons. Since the manufacturing is de- centralised and relatively labour intensive (at present, compared to alternatives; oil and electric heating), it is expected to have provided social benefit through increased employment. Unlike oil and gas, it does not need fuel processing, and hence air and water pollution associated with processing of these fuels is reduced. The technology is safer to use compared to other alternatives (gas, electricity). Installation of systems may however need careful planning to avoid disturbing landscape an d building attractiveness. Impacts of PV systems Electrification positively impacts the living conditions of consumers and they provide productive or income generating activities. This is through irrigation of agricultural and grazing lands (using PV pumping technolog y), crop drying and providing energy for small scale projects. As a source of clean energy, it reduces pollution. It also promises to be a sustainable energy source and provides global benefits through reduction of CO 2 emissions from the conventional electricity generation. Impacts of LBPs LBPs have potential to reduce GHG( green house gases) emissions from waste and replacing reducing fossil fuels usage. The organic fertilizer produced by LBPs can substitute a part of chemical fertilizer usage, reducing GHG emissions (emitted from energy used in producing the fertiliser) and soil pollution from chemicals. LBPs can also be expected to have positive social impacts through increased employment and income generating activities.   The actions that could be taken to overcome the barriers and use the opportunities provided by the RETs are summarised below. Economic / Financial Barriers Creation of financial schemes (for purchasing RETs equipment and systems.) Reduction in taxes and duties on the components and / or materials needed for renewable energy (RE) systems. Government-supported market incentives to encourage commercial development and deployment of RE technologies. Technical Barriers Setting rules and legislation for quality assurance, standardization, and certification of all the RE components and systems. Manufacturers, suppliers, and agents should have their representatives and centres near the consumers. Information and Awareness Barriers Development of effective public awareness and promotion programs such as demonstrations of systems, brochures, training courses, and workshops for targeted users. 2.7 Conclusion From the literature review it can be found that there are different ways to adopt so that to reduce the consumption of energy. It can be found that the solar panel is being used increasing in different industries. Moreover, new measures of alternative energy are being developed to minimize the consumption of energy. Thus the new ways of developing alternative energy will help to lead hotels and other industry to a sustainable industry. Moreover, this also an overview for hotels to know how far they are able to implement alternative source of energy and how they can also be able to reduce their cost of energy and their consumption. However, there are some barriers that they will have to face in order to implement those alternative source of energy. CHAPTER THREE: METHODOLOGY 3.0 Introduction This chapter provides the methodology of the survey envisaged on the implementation of renewable sources of energy in the hotel industry. In this vein, it represents the crux of the study and it therefore, seeks to outline the key aspects before, during and after conducting of the survey. It offers a framework about how the research was carried out and elaborates on the questionnaire design and enumerates several limitations pertaining to the survey. 3.1 Sources of data For this research both primary and secondary data were used. Table 3.1: Types of Data Primary Research Secondary Research Questionnaire Books Academic Journals The research method used to collect and analyses the primary data were the qualitative approach. This is so because these data are considered to be more critical and more likely to present a true picture of the Alternative sources of energy used in hotel industry. 3.2 Method of Data Collection To be able to make a true and valid assessment of the present alternative sources of energy in hotels, it was deemed appropriate to carry out a face to face interview to gauge real situation within the organizations (Appendix A). The interview was addressed to the Maintenance Manager of the different hotels: namely Prince Maurice, Touessrok, Silver Beach, Long Beach and Belle-Mare Plage since they are directly involved in carrying out duties, functions, and management of energy consumption.   3.3 Sampling Since this was a comparative study and we have different hotels thus the Sampling was limited to five hotels. The hotels were contacted through email and telephone calls. These five establishments were selected due to their category, as they are among the best hotels in the district flacq. 3.4 Questionnaire Design The questionnaire used for this survey comprises of 6 questions which Moreover, the following factors were taken into consideration when designing the questionnaire; The questions available in the questionnaire provide the data to meet the objectives. Each question is clear, relevant, concise and well-constructed to encouraged respondents to answer. There are both open-ended and close-ended questions to capture both the qualitative and quantitative data. The aim of the questionnaire was to get specific answers about impletementing alternative source of energy within the hotel sector. 3.6 Interview A face to face interview was conducted with the maintenance manager of the different hotels. Interview questions were designed so as to be more precise in the search of information. It was a structured interview that is the questions and their sequences were fixed. The interviewer reads the questions from the interview schedule previously prepared (Black and Champions 1976: 364-368; Kerlinger 1973: 481). From the interview method, the different management strategies of the different hotels were known. The results gain in the interviews will be used to compare the alternative energy used in the different hotels. The main advantages of that kind of interview are that it permits greater depth of answers and it often has a higher response rate than questionnaires. The interview lasted about an hour with the Maintenance managers for the different hotel, Le Touessrok Hotel, Le Prince Maurice and Long Beach hotel. However, hotels like Belle-Mare Plage and Silver Beach didnt respond to our r equest. There was a combination of different types of questions. As the research is more qualitative in nature, open ended questions were used to allow the respondent to express his or her opinion freely on specific issues and to reply in his own words. The same questionnaire was applicable for all the hotels for the interview. The research questions covered in this questionnaire was related to: Difficulties involved in implementing different alternatives sources of energy in the hotel industry. Government support Energy conservation programs /schemes that are or can be implemented in the hotel industry. Awareness of present renewable sources of energy. Future plan to implement renewable sources of energy 3.7 Limitation of study Normally, no survey can experience a perfect evolution. Similarly, the present one had to undergo certain constraints and was subject to various limitations as exhibited below. Further research on how the implementation alternative sources of energy could have been undertaken but due to the restriction such as: The busy schedules of respondents; some of them were not keen to respond to the interview due to time constraints Having access to the hotels was quite difficult since it was time consuming to have the permission and authorization to interview the maintenance managers for example like Belle- Mare Plage and Silver Beach hotel. The main problem were transport facilities , since we had to go to the hotels by bus and taxi 3.8 Conclusion This chapter provides a thorough explanation of how data was collected, processed and analyzed for the methods of data collection. It gives further details on how the questionnaire was designed and how the interview was conducted at the hotels. Lastly, the limitations of the research were discussed that is all the constraints to be able to collect data. CHAPTER 4 RESULT AND DISCUSSION 4.0 Introduction This chapter deals with the findings gain through the interviews of the different hotels, Le touessrok hotel, Long Beach, Le Prince Maurice. These interviews helps us to understand how the two WHS are being managed and what are the different policies that are set up for managing such site. With both interviews, a comparison study of sites is done in order to judge against the strategies being used at both sites. 4.1 Awareness Q1: Are you aware of the renewable sources of energy ( Solar, Wind, Tidal, Biogas and ? Mr, Ahbisek Sobrun, Le Touessrok Hotel:   They are initially aware of renewable sources of energy. For instance, they argued that they are informed about the solar, wind, and tidal energy. Due to the increase demand for energy in the hotel, they stated that they need to venture towards new sources of energy that will have the potential to compensate at least a percentage of the required demand. Mr. Avinash Bissesur,Le Prince Maurice: They were aware of the alternative of energy that can be implemented in the hotel industry due to the fact that they received monthly magazines that are related to those energy and also due to global warming of   the earth which is occurring right now. Moreover, while attending meetings among hotels groups with potential investors towards green energy. Mr. Christian Kim Luck, Long Beach Hotel: They are aware of the alternative source of energy. However, due to the fact of recent renovation of the hotels rating from a 3 star to a 4 star*, investment cost of renovating is so huge that investing in alternative resources of energy would have lead to a deficit. From the above statement of the different   maintenance managers of the hotels, it can be found that they are aware of the different alternatives source of energy available presently. Though, they have the knowledge about the potential benefits of these sources of energy, yet it is quite difficult implement these sources in the hotels   presently. In addition that, participating in conferences, seminars and forums towards green energy, have lead certain hotels companies like sun resorts limited to invest in solar panels as it is going to be implemented at   Le Touessrok Hotel in the future, approximately in seven years. Hence, it is found that the other hotel groups, like Constance, have not opted to go towards green energy presently. 4.2 Implementation Q2: Have you think about implement these alternative source of energy in the hotel? Mr. A. Sobrun, Le Touessrok Hotel: At present the hotel have not implemented any alternative sources of energy. This is because of the initial cost that is huge to invest in these projects. However, they have future plans in investing in these projects. For instance at Le Touessrok they are going to implement the solar panel technology in 7 years. Mr, A. Bissesur, Le Prince Maurice: The hotel has not implement any alternative sources of energy. this is so because the cost of implementing such projects are costly and the return on investment will take several years. Mr. C. K. Luck, Long Beach Hotel:with the recent renovation, the implementation of such projects is not possible for the time being. However, they have future plans for investing in such projects after recovering from the investment cost of the renovation. From the results above, It can be found that the hotels are indifferent for the implementation of the alternative source of energy for the moment as there are lots of research and works to be done in order to implement these sources. They are merely interested in investing in alternative sources of energy, but not for the time being. As stated above by the maintenance manager of Le Touessrok Hotel, they are working upon the implementation of those energy in the seven coming years. But this is not the case for Long Beach hotel and Le Prince Mauritius, where the Maintenance   manager of the respective hotels argued that the implementation of alternative source of energy will cost them a lot money and investment. Hence, it can be found that they have an interest in implementing them in a coming future. 4.3 Barriers in implementing Q3: What would be the difficulties involved in implementing these alternative sources of energy? Mr, A. Sobrun,Le Touessrok Hotel: To start with, the main drawback is about the huge investment cost that should be done in order to have these sources of energy. for instance, if they want to reduce the consumption of energy by at least 30 % they will have to invest about several millions. However, we are planning to insert solar panel in   the future and this will take us around 6-7 years to implement this project. The main reason is that this decision has been taken from the main office and the maintenance manager cannot take decisions alone. Investing in the solar panel in 7 years later, will help us to have the sufficient amount of finance and support from the government. We also perceive that in 7 years the investment cost will be lowered in cost and we will have a greater return on investment. However, we do ,believe that in the future coming years we may have other alternative sources of energy that can be more efficient than solar panels. Moreover, we have to look for a better landscaping area whereby we could benefit from maximum sunlight as well as not having a scenic pollution due to the fact that solar panel takes a lot of space. Mr. A. Bissesur, Le Prince Maurice:   the main drawback is about the cost involved in the solar panel. We do believe that this will reduce our consumption of energy but it will be in the long run. If we want to supply all the hotel it will cost us about several hundred millions of rupees. We should also take into consideration about the shareholders since they wont receive too much of dividend if the hotel invest huge sum of money.   We will have to take into consideration about the land clearing in order to allocate space for these panels. Moreover, care should be taken before investing in such project since this industry is seasonal and during off-peak season we wont recover our cost. Mr. C. K. Luck, Long Beach hotel: to start with, the main drawback is about the huge investment cost that should be done in order to have these sources of energy. The main reason is that this decision has been taken from the main office and the maintenance manager cannot take decisions alone. However, we do ,believe that in the future coming years we may have other alternative sources of energy that can be more efficient than solar panels. Moreover, we have to look for a better landscaping area whereby we could benefit from maximum sunlight as well as not having a scenic pollution due to the fact that solar panel takes a lot of space. From the above analysis it can be found that the major constraints in implementing alternative sources of energy is merely in the investments costs involved in these projects. The second factor is concerned about land area whereby there should be clearance of certain land area in order to implement these solar panel since they cover large spaces. In addition to that decision are taken by head office and thus it is quite difficult and time consuming. Besides, that decision is quite difficult to implement without their consentment since huge investment affect their dividend yield. Furthermore, since the tourism and hospitality industry is seasonal, during off-peak season will be quite difficult to cover the cost. 4.4 Energy Saving Q4: What are the energy saving decisions that to implement in the hotel? Mr, A. Sobrun, Le Touessrok Hotel : We usually place notice in the staff canteen , rooms and we lay emphasis to give initiatives to our staff and guest towards energy conservation. We are working on the implementation of the LED (light emitting diode) project whereby we would lik to replace all bulbs by LED . All our lighting system and air conditioning in rooms and villas are all link to the key of the rooms . For instance , once the key is inserted in the room th lighting system and conditioning system are in operation. Mr. A. Bissesur, Prince Maurice : It is a mere fact that we should be aware about the increase in demand for energy in the tourism and hospitality sector. However initiative should be taken in the hotel itself, in order to have a reduction in the daily cost in energy. We have All our lighting system and air conditioning in rooms and villas are all link to the key of the rooms . For instance , once the key is inserted in the room the lighting system and conditioning system are in operation. Mr. C. K. Luck, Long beach : For our hotel ,we have put low consumption bulbs in order to save in terms of cost, light sensors are also placed in various parts of the hotel, in order not to waste energy During the day.   We have design the hotel in such a way that we benefit from sunlight and it is not necessary   to light up the rooms during the day. We also have educative campaign to all staff in order for them to be conscious about energy conservation. All our lighting system and air conditioning in rooms and villas are all link to the key of the rooms . For instance , once the key is inserted in the room th lighting system and conditioning system are in operation From the above analysis it has been found that the three hotels take measures at least to save energy in the hotel. The more the hotel is the generating revenue the more they are trying to use certain measures for energy conservation. Moreover, the fact that energy consumption is a cost for the hotel they have to abide by the rules that the government have set up. Also use of the bulbs that the government has put into action in Mauritius is useful to save energy. The more they are going to save the energy the more the revenue will be. The fact that hotel extensive amount of air conditioning in rooms and light, it has become a great issue in the hotel industry. Therefore as these hotels are among the best hotels they are trying the maximum to implement energy saving measures. For Long Beach hotel it is a good decision whereby to use the natural light rather than electricity. More hotels should implement these simple methods so that to save energy. 4.5 New equipment to save reduce energy cost Q5: Do you encourage energy conscious specification in selection of new equipment? Mr, A. Sobrun, Le Touessrok Hotel : concerning the selection of equipment it is quite difficult to implement decisions about the selection of equipment that consume less electricity this is so because the equipment are bought by the head office and they are the one who do the selection. In addition, to that, It is the research and development of the manufacturer itself to develop equipment that have low consumption of energy. For instance, we have replaced the pizza oven which was initially operational with gas and this has been replaced by an oven using wooden brickets. This is more efficient Mr. A. Bissesur, Le Prince Maurice: when our equipment have reached their life time, we replace them with new and more efficient equipment in terms of energy saving and increase in output produced, for example, new mechanized vegetable peelers. We opt for equipment that have better yield in terms of output and energy consumption. Mr. C. K. Luck, Long Beach Hotel: with the recent renovation, we have included low consumption equipments and materials concerning HVAC ( Heating, ventilation and Air- conditioning system. This is has been the decision of the head office in order to reduce the daily cost in energy As per the answers above it can be seen that Le Touessrok hotel finds it difficult to buy new equipments because it does not depend on them, it is a decision that should be taken by the management moreover according to its statement the hotel is already trying to apply the new equipments to the hotel that is the pizza oven. They are not really concerned by this as for the staff its the management that needs to take the appropriate measures. Concerning the long beach hotel and Le Prince Maurice they are already applying the new equipments to the hotel. According to them they are concerned directly by the usage of electricity thats why they are adapting low consumption equipments in their hotels. That is long beach is applying it to their HVAC system and LE Prince Maurice for their mechanized vegetable peelers. 4.6 Action to be Taken Q6: Do you think that action needs to be taken immediately to reduce energy consumption? Mr, A. Sobrun, Le Touessrok: since we are having more and more development, especially in the tourism and hospitality industry ,there is an increase in the demand for energy. During the dawn the amount of energy consumed by hotels ,especially electricity is enormous. If we do not venture in new alternative sources of energy, we are going to be faced with a shortage in the supply of electricity. Mr. A. Bissesur, Le Prince Maurice: We should lay emphasis towards sensitization of our staff and guest since initiative for energy conservation should be done from the root itself. Once they are conscious it is believed that there will be a reduction in the daily cost in energy . In the future if we invest in alternative sources of energy we shall be better off in the long term towards energy consumption. Mr. C. K. Luck, Long Beach: According the maintenance manager, energy conservation can be done through small incentives like installation of light sensors in toilets , rooms and pathways. In addition street lighting that are included in the pathway of the hotel could be replaced by solar lamps From the above statement of the different maintenance managers of the hotels, it can be found that they are aware of the fact that staff as well as customers must be sensitized on the consumption of energy because according to Le Touessrok if alternative sources of energy is not used in the near future they will face a shortage in the supply of electricity. Moreover as there are new technologies being adopted in these hotels these require more and more energy thus alternative sources must be developed. According to Le Prince Maurice sensitization should start. Sensitization can be done through meeting with the staff as well during the relax time of the guest and this can take only 5 minutes to encourage them to save energy. Finally Long beach stated that the sensitization can also be done through small incentives such as like installation of light sensors in toilets , rooms and pathways. Chapter 5 Recommendation and Conclusion 5.0 Recommendation The recommendations are intended to be comprehensive but reflect the priority energy issues. The resulting recommendations are categorised into these main areas: 5.1 Renewable Energy Initiatives To expand the use of renewable energy technologies in hotels of Mauritius it will be critical to identify key project opportunities. One of the main fundamentals matters are to attract probable investors is a basic set of data identifying key resource locations and telling the likely quantity and quality of such assets. A broad measurement of renewable energy resources, including hydro, wind, biomass, solar and geothermal, should be assembled, building on past assessments such as the BEB.Renewable Energy Study. (1990) and the BEL .Least-cost Generation and Transmission Planning Study. (1999). Site-specific assessments should be conducted in expectation of locating quality resources with the probable for commercial utilization. All projects recognized must incorporate the issue of natural disaster attentiveness into their design and execution. Carry out renewable-energy resource assessments for hydro, wind, biomass, geothermal, and solar energy and amass these into a single Renewable Energy Resource Database to use in promoting Le Touessrok, La prince Maurice and Long beach as a destination for renewable-energy investments. The database should not only identify resources, but should contain potential project proposals. 5.2 Energy Efficiency Initiatives From an individual perspective, it can mean significant savings over the long term. However, despite the obvious benefits, there has historically been a lack of energy-efficiency initiatives in Hotels in Mauritius. Implement a broad energy-efficiency training program for utility staff, hotel developers and engineers, possible entrepreneurs and other pertinent stakeholders. The hotels of Mauritius Building Codes should be reviewed to include potential energy saving design features. Appliance importers should be educated about energy efficiency and encouraged to import energy efficient appliances. The long-term success of energy-efficiency initiative depends on a high level of encouragement from the general public Design and initiate a national energy-efficiency education and awareness programme meant at all sectors of civil society, to correspond the overall goals of the government with respect to the country, economic development, defense of the environment, and the links to, and adv antages of energy-efficiency. This programme can be conducted in conjunction with the awareness programme on renewable energy. 5.3 Solar Energy As consumers demand more eco-friendly vacation choices, the tourism industry is responding with energy-efficient and carbon friendly resorts and hotels. Other environmental steps the hotel has taken include food composting and recycling, installation of a new kitchen exhaust hood control system to save energy costs, and converting to CFL lights wherever possible and replacing garage lights with QL lights for energy savings. There is a need to understand that the sun is the main source of energy of the earth and the solar system. They should investigate how the water cycle transforms solar energy into hydroelectric power. Moreover they should to understand the process of photosynthesis and investigate the different methods of direct collection of solar energy. Finally, be able to recognize the use of photovoltaic cells in transforming the energy received from the sun into electrical energy. 5.4 Wind and water Energy The hotel should understand that wind and water are major energy sources of life on earth. And be able to identify several sources of wind and water energy as alternative forms of energy. Moreover they should determine the advantages and disadvantages of using alternative energy sources and investigate the working of windmills and how they are used to obtain energy from wind. Furthermore, the hotels should understand the working of modern wind turbines and modern wind energy systems and how alternative forms of energy are directly or indirectly converted into other forms of energy, such as heat and electricity. Also to investigate the process of obtaining energy from water waves. 5.5 Conclusion In the very near future, energy efficient hotels will cease to be the exception but will be the rule. Energy conservation and the intelligent utilization of renewable energy sources are prerequisite for sustainable development of tourism. Due to global warming and increased standards in hotel industry, there is an increasing demand for energy for cooling in general, although this is especially reflected in hotel industry peaking in summer period. Furthermore, energy demand for hot water and food and beverages preparation in a hotel increases proportionally with the number of tourists. All these energy issues are overburdening the ever competing hotel industry. Hotels, in order to optimize their energy costs and implementation of renewable energy sources utilization, have to perform energy audit an analysis of thermal performance and energy systems of building with the purpose to determent its energy efficiency or non-efficiency. From a hotel managements perspective, energy represents a significant but one of many cost items in their balance sheets that could influence on hotels bottomline profits4. Energy efficiency measures can always be implemented in a building to improve energy systems. They vary from simple measures of energy efficiency with no additional costs, measures with small expenses and fast payback period (up to 3 years) to those measures with higher expenses, longer pay back period (more than 3 years) which are connected to reconstruction activities. Due to heterogeneity of accommodation facilities in size, age, construction material, energy appliances, luxury level, location, etc. that affect the consumption pattern, it is difficult to apply common methods of energy consumption analyses such as energy auditing in hotels without some adjustments. This induces another problem for evaluating energy efficiency in hotel industry which is deciding on what is the industry best practice and lack of benchmarking32. Although it is difficult to benchmark   alternative sources of energy in overall hotel industry, a successfulness of the suggestion measures could be individually evaluated by the same quality of service provided and pleasure of guests achieved in the hotel while having lower energy bills than before the energy efficiency measures applied.