Thermodynamic and Thermo Economic Optimization of Combined Cycle Power Plant of Shiraz

Combined cycle power plants are the most effective as they not only have a high efficiency and power but also have other advantages like flexibility and quick operationalization. In this paper, the combined cycle power plant of Shiraz, including gas and steam sections, is economically and technologically analyzed and optimized using the EES software. The evaluation criterion in optimization is a function of the total cost, consisting of overheads (thermodynamic costs) and investment cost (economic costs). In this method, the amount of exergy flow in system lines and the amount of exergy destruction in each component of the cycle are determined. Then, with the application of exergy balance cost in each component of the system, exergy cost equation system is worked out, which in turn helps work out the cost of exergy unit in flow lines, the cost of exergy destruction in different components of the system, and other required variables in the analysis of economic exergy.

Keywords:

cycle power plants , exergy , economic exergy , optimization