Numerical analysis and field study of the time-dependent exergy-energy of a gas-steam combined cycle

Abstract

In this study, a time-dependent exergy analysis of the Fars Combined Power Plant Cycle was considered. The exergy analysis was used to investigate each part of the actual combined cycle by considering irreversibility from April 2006 to October 2010. Performance analysis was performed for each part by evaluating the exergy destruction in each month. By use of the exergy analysis, the aging of each part was evaluated with respect to time. In addition, the rate of lost work for each month was calculated and the variation of this parameter was considered as a function of aging rate. Finally, the effect of exergy destruction of each part on the exergy destruction of the whole cycle was investigated. The entire analysis was realized for Unit 3 and 4 of the gas turbine cycle that combine with Unit B of the steam cycle in the Fars Combined Power Plant Cycle located in the Fars Province in Iran.