TY - JOUR
TI - Optimization of the triple-pressure combined cycle power plant
AU - Alus Muammer
AU - Petrović Milan V
JN - Thermal Science
PY - 2012
VL - 16
IS - 3
SP - 901
EP - 914
PT - Article
AB - The aim of this work was to develop a new system for optimization of  parameters for combined cycle power plants (CCGTs) with triple-pressure heat  recovery steam generator (HRSG). Thermodynamic and thermoeconomic  optimizations were carried out. The objective of the thermodynamic  optimization is to enhance the efficiency of the CCGTs and to maximize the  power production in the steam cycle (steam turbine gross power). Improvement  of the efficiency of the CCGT plants is achieved through optimization of the  operating parameters: temperature difference between the gas and steam (pinch  point P.P.) and the steam pressure in the HRSG. The objective of the  thermoeconomic optimization is to minimize the production costs per unit of  the generated electricity. Defining the optimal P.P. was the first step in  the 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 282  MW CCGT power plant with a typical design for commercial combined cycle power  plants. The optimized combined cycle was compared with the regular CCGT  plant.