Keywords: supercritical power plants, irreversibility, exergy efficiency, condenser pressure, exergy analysis, energy analysis, ambient temperature, boilers, condensers, heaters, feed water pumps, turbines
Energy and exergy analyses of a supercritical power plant
Energy and exergy efficiencies of a supercritical power plant have been studied in this paper. The effect of ambient weather condition was considered on the condenser pressure. It was shown that high ambient temperature has more adverse effect on the exergy efficiency than the energy efficiency. As ambient temperature increases, the exergy efficiency of the boiler, condenser, heaters and feed water pump decrease, while the exergy efficiency of the turbine improves slightly. The analysis showed that exergy efficiency of the supercritical boiler is considerably higher than the conventional boiler but it is still the main source of total irreversibility.