Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Mechanical Power Engineering

In this study, An energy and exergy analysis were made on the Abu Qir power plant unit 5 in Alexandria, Egypt to measure the performance of the unit and to identify the plant components that have the largest amounts of losses. The analysis was made on the loads 277 MW, 260 MW, 233 MW and it is compared with the design load . The largest amount of exergy destruction was found at the load of 277 MW where the highest exergy destruction was found in the boiler which destroyed 405.6 MW. It is followed by the turbine where 66.3 MW was lost to the environment. The condenser was the third highest source of irreversibility with a value of 13 MW. The 1st and 2nd law net efficiencies in this case were 37.54% & and 35.41% respectively. In addition, The exergy efficiency of the turbine and boiler decreased when the environment temperature raised (as in the summer) while the condenser efficiency increased. Each decrease in the intermediate turbine steam inlet temperature by 10 degrees will cause the unit load to decrease by 5 MW and the thermal efficiency by 0.73%. Also, each raise in the condenser pressure by 0.01 bar, the unit load decrease by0.7 MW and the thermal efficiency drop by 0.8%

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