Geothermal power generation apparatus using compressed air of high temperature and high pressure generated from the compressed air energy storage generation system
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PURPOSE: A geothermal power generator using high-pressure/temperature compressed air of a CAES(Compressed Air Energy Storage) system is provided to be possible not to install a cooler at the back of a compressor by using air as a heat source for geothermal power generations. CONSTITUTION: A geothermal power generator using high-pressure/temperature compressed air of a CAES(Compressed Air Energy Storage) system comprises underground water- bearing stratums(10), a heat-exchange line of injection water(12), an injection water pump(12) and hot water ejection pump(16). A compressed air supply line(8), which connects a compressor to an underground rock storage cavern(6) penetrates the underground water bearing stratums. Subsurface water flows into the underground water bearing stratums through the heat-exchange line of injection water. The heat-exchange line of injection water supplies the water to the ground through heat-exchanging the subsurface water with high-temperature compressed air passing through the compressed air supply line. The injection water pump artificially supplies the subsurface water to the heat-exchange line of injection water. The pick-up pump extracts the heat exchanged water through heat-exchange line of injection water.