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

摘要

A thermal power generation system includes a combustor burning oxygen and fuel with supercritical CO₂, a turbine driven by the supercritical CO₂ and water vapor fed from the combustor, a low-pressure supercritical CO₂ storage storing low-pressure supercritical CO₂ from the turbine, a compressor compressing the low-pressure supercritical CO₂, a high-pressure supercritical CO₂ storage storing high-pressure supercritical CO₂ from the compressor, and a high-pressure supercritical CO₂ feeder supplying between the high-pressure supercritical CO₂ storage and the combustor, in which the high-pressure supercritical CO₂ feeder supplies the high-pressure supercritical CO₂ to 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 NO_x and CO₂.