Thermal power generation system and method using supercritical carbon dioxide as working fluid

Abstract

A thermal power generation system includes a combustor burning oxygen and fuel with supercritical CO, a turbine driven by the supercritical COand water vapor fed from the combustor, a low-pressure supercritical COstorage storing low-pressure supercritical COfrom the turbine, a compressor compressing the low-pressure supercritical CO, a high-pressure supercritical COstorage storing high-pressure supercritical COfrom the compressor, and a high-pressure supercritical COfeeder supplying between the high-pressure supercritical COstorage and the combustor, in which the high-pressure supercritical COfeeder supplies the high-pressure supercritical COto the combustor at a constant pressure. Thus, the thermal power generation system can perform adjustment of an electric power supply required to use unstable renewable energy sources such as solar and wind power, can achieve high efficiency power generation with high temperature working fluid, and can reduce emissions of environmental load substances such as NOand CO.