Thermodynamic Simulation of A Combined Cycle Power Plant At Part-Load Operation

A 355 MW combined-cycle power plant has been modeled and simulated at part loads. Results of a sensitivity analysis of the effect of high pressure (HP) on the combined-cycle performance are presented. The best combination of process parameters of steam leaving the steam generator that will give optimum performance of the combined-cycle power plant were determined at part load operation. Results for the optimum values of thermal efficiency and power output, together with values of the decision variables, are presented. At part loads, the plant demands lower values of HP pressure to get a suitable dry steam at the steam turbine exit. The combined cycle gives higher power output with high efficiency at full load comparatively at partial loads.