Orude, Okemena Jerry <br/><br/>
COMPARATIVE ANALYSIS OF COMBINED THERMAL POWER AND REFRIGERATION SYSTEMS UTILIZING SOLAR ENERGY / 
OKEMENA JERRY ORUDE; SUPERVISOR: ASST. PROF. DR. ALI SHEFIK; CO-SUPERVISOR: ASST. PROF. DR. HUMPHREY ADUN 
 - x, 94 sheets;  31 cm.  Includes CD 
<br/><br/>Thesis (MSc) - Cyprus International University. Institute of Graduate Studies and Research Energy Systems Engineering Department 
<br/><br/>Includes bibliography (sheets 84-94) 
<br/><br/> ABSTRACT<br/>In the present study, 3 solar thermal powered electricity and cooling cogeneration <br/>systems are analysed and compared. The first system uses thermal energy from a <br/>parabolic trough collector (PTC) to generate electricity using an organic Rankine cycle <br/>(ORC) and portion of the produced power is used to provide cooling using a vapor <br/>compression refrigeration cycle. In the second cycle, the energy from the PTC is used <br/>to simultaneously generate electricity and provide cooling using a vapor ejector <br/>cogeneration cycle. In the third system, the energy from the PTC is used to <br/>simultaneously generate electricity and provide cooling using a vapor absorption <br/>cogeneration cycle.<br/>The 3 systems are analysed based on thermodynamic and exergy viewpoints. Energy, <br/>exergy, and exergy cost rates are calculated for all cycle streams. The results showed <br/>that system 2 has the highest energy efficiency of 16.33% compared to 14.47% for <br/>system 1, and 12.37% for system 3. Similarly, system 2 has the highest exergy <br/>efficiency of 63.54% compared to 56.29% for system 1, and 48.15% for system 3. <br/>From the exergoeconomic analysis, the total production unit cost is lowest in system <br/>2 which has 73.02 $/GJ compared to 75.33 $/GJ in system 3, and system 1 has 291.7 <br/>$/GJ. From the exergoenvironmental analysis, system 2 has the highest amount of fuel <br/>and CO2 emission savings followed by system 1 and then system 3. The CO2 emission <br/>savings in system 2 is 198 tons/yr compared to 168 tons/yr in system 1, and 134 tons/yr <br/>in system 3. The exergoenvironmental impact factor and exergoenvironmental impact <br/>index also show that system 2 has the most suitable impact of the 3 systems. <br/>The 3 systems all reacted positively to an increase in solar radiation as more energy <br/>will be available to power each of the systems. However, for an increase in the cooling <br/>load, system 1 was negatively affected while system 2 and system 3 were positively <br/>affected. This shows that system 1 will have a better performance when it is <br/>predominantly used for power generation than for cooling. Overall system 2 was <br/>shown to have the best results of the 3 systems.<br/>Keywords: Cooling, Exergoeconomics, Exergoenvironmental, Exergy, Power, Solar <br/>thermal. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cooling--Dissertations, Academic<br/>Exergy--Dissertations, Academic<br/>Solar thermal energy--Dissertations, Academic