Optimization of the triple-pressure combined cycle power plant

Thermal Science

关键词: combined cycle;    heat recovery steam generator;    thermodynamic optimization;    thermoeconomic optimization;   

DOI  :  10.2298/TSCI120517137A

来源: DOAJ

【 摘 要 】

The aim of this work was to develop a new system for optimization ofparameters for combined cycle power plants (CCGTs) with triple-pressure heatrecovery steam generator (HRSG). Thermodynamic and thermoeconomicoptimizations were carried out. The objective of the thermodynamicoptimization is to enhance the efficiency of the CCGTs and to maximize thepower production in the steam cycle (steam turbine gross power). Improvementof the efficiency of the CCGT plants is achieved through optimization of theoperating parameters: temperature difference between the gas and steam (pinchpoint P.P.) and the steam pressure in the HRSG. The objective of thethermoeconomic optimization is to minimize the production costs per unit ofthe generated electricity. Defining the optimal P.P. was the first step inthe optimization procedure. Then, through the developed optimization process,other optimal operating parameters (steam pressure and condenser pressure)were identified. The developed system was demonstrated for the case of a 282MW CCGT power plant with a typical design for commercial combined cycle powerplants. The optimized combined cycle was compared with the regular CCGTplant.

【 授权许可】

Unknown