Machines. Technologies. Materials.
Vol. 15 (2021), Issue 1, pg(s) 28-31

TECHNOLOGIES

Thermodynamic analysis of a 500 MW ultra-supercritical pulverized coal power plant

  • 1 University of Rijeka, Faculty of Engineering, Rijeka, Croatia

Abstract

This paper analyses the performance of a future planned 500 MW ultra-supercritical pulverized coal power plant. The steam cycle configuration comprises a single-stage reheat, four high pressure feedwater heaters, three low pressure feedwater heaters and the deaerator. The electricity generation unit consists of a high pressure turbine, an intermediate pressure turbine, two double-flow low pressure turbines and the electric generator. The analysis is carried out for live steam temperature of 600 °C and pressure of 300 bar while th e reheat steam temperature is 610 °C and the pressure is 50 bar. The condenser pressure is 0.039 bar. The analysis revealed that the ultra-supercritical power plant achieves a gross thermal efficiency of 47.39% and a net thermal efficiency of 45.14%. The specific CO2 emissions per unit of generated electricity are 733.4 kg/MWh. Relatively to existing subcritical units, the analyzed ultra-supercritical power plant achieves a net efficiency gain of 9%-pts. and a CO2 emission reduction of around 20%.

Keywords

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