Exergetic and thermoeconomic analyses of a combined cycle plant

Abstract

Exergetic and thermoeconomic analyses were performed for a 500-MW combined cycle plant systematically. In this analysis, the mass and energy conservation laws were strictly applied to each component of the system. Careful attention was also paid to the quantitative balances of the exergy and exergetic cost for each component as well as the whole system. The exergoeconomic model employed provided, which is self-consistent the productive structure of the system considered, consequently could visualize the cost formation process and the productive interaction between components clearly. The computer program developed in this study may apply to determine the production cost of any power plant such as gas turbine and gas-turbine cogeneration systems and to study the thermodynamic performance and the sensitivity of such plants to changes in process and/or component design variables.