الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Demand for power generation has been increasing day by day and, hence, a clean and efficient way of generating power is becoming more and more important. Egypt’s power generation majorly depends on fossil fuels like Heavy oil and Natural gas. Among power plants, New Abu-Qir Natural gas fired power plant is of great concern due to the relatively high production. Analysis of the power generation systems is an important issue that enables getting the efficient use of the energy resources. In the present research, an exergy analysis is performed in order to analyze the system performance. This research deals mainly with the exergy analysis of New Abu-Qir Natural gas fired power plant operating in subcritical conditions. The power of this plant is 650 MW and the main steam conditions at full load used are 538 o C temperature and 166 bar pressure. The objective of this study is to analyze the various working parametric conditions that lead to the highest exergy destruction. This thesis will examine a detailed exergy analysis of a thermal power plant, in order to assess the distribution of irreversibility and losses, which contribute to loss of exergy efficiency in system performance. The power plant model used different operating conditions at full load and part loads. The overall exergy efficiency of the plant was determined to be 38.56 % at full load. The results obtained from the exergy analysis showed that the steam generator had the highest exergy losses followed by the turbine. The exergy losses in the steam generator and the turbine represent 87.7 %, 7.6 %, respectively of the total exergy losses of the plant. The results revealed that the irreversibility in the combustion process is the main reason for exergy loss in the steam generator. This irreversibility is due to the greater entropy generation. Increasing the preheated air temperature, increasing the feed water temperature, increasing the main steam temperature, increasing the main steam pressure, and decreasing the excess air percentage lead to decrease the exergy destruction rate in the steam generator.