Effect of key parameter on thermodynamic and thermoeconomic performance of steam power plant

摘要: The first law of thermodynamics is a useful tool for thermodynamics processes analysis. The exergy analysis of a conventional steam power plant was done. This analysis is based on first and second law of thermodynamics. In the present paper, a conventional steam power plant was investigated using a thermoeconomic analysis. Having done this analysis the inefficient components of a steam power plant cycle was identified. In this analysis, it was assumed that the cycle components are adiabatic and the potential and kinetic terms of exergy were negligible. The exergy analysis combined with the economical aspects. These aspects include capital investment cost, fuel cost and operating and maintenance cost for evaluation of final cost of product. According to this calculation exergy destruction cost of each component in the cycle and their role were evaluated. Based on these results the effect of the component efficiency on the final cost of the product and performance revealed. Effect of main steam temperature, reheated temperature, condenser pressure and number of the feed water heaters on cycle performance and final electrical power cost were also determined.