Simulation and Parametric Optimization of Thermal Power Plant Cycles

The objective of the paper is to analyze parametric studies and optimum steam extraction pressures of three different (subcritical, supercritical and ultra-supercritical) coal fired power plant cycles at a particular main steam temperature of 600 0C by keeping the reheat temperature at 537 0C and condenser pressure at 0.09bar as constant. In order to maximize the heat rate gain possible with supercritical and ultra-supercritical steam conditions, 8 stages of feed water heater arrangement with single reheating is considered. The system is optimized in such a way that the percentage exergetic losses are reduced for the increase of the exergetic efficiency and higher fuel utilization. The plant cycles are simulated and optimized by using Cycle Tempo 5.0 simulation software tool. From the simulation study, it is observed that the thermal efficiency of the three different power plant cycles obtained as 41.40%, 42.48% and 43.03% respectively. The specific coal consumption for three different power plant cycles are 0.56 Tonnes/MWh, 0.55 Tonnes/MWh and 0.54 Tonnes/MWh. The improvement in feed water temperatures at the inlet of steam generator of respective cycles are 291 0C, 305 0C and 316 0C.

Source: Perspectives in Science - April 27, 2016 Category: Science Source Type: research