Title: Energy and exergy analyses of a supercritical power plant

Authors: Ebrahim Hajidavalloo; Amir Vosough

Addresses: Mechanical Engineering Department, Shahid Chamran University, Ahvaz, Iran. ' Mechanical Engineering Department, Shahid Chamran University, Ahvaz, Iran

Abstract: 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.

Keywords: supercritical power plants; irreversibility; exergy efficiency; condenser pressure; exergy analysis; energy analysis; ambient temperature; boilers; condensers; heaters; feed water pumps; turbines.

DOI: 10.1504/IJEX.2011.044059

International Journal of Exergy, 2011 Vol.9 No.4, pp.435 - 452

Available online: 25 Nov 2011 *

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