AIR COMPRESSION HEAT ACCUMULATING POWER PLANT WITH AN UNDERGROUND HEAT ACCUMULATOR FORMED IN THE AQUIFER (GAES)

摘要

The offered high-temperature GAES is designed as a stabilising structure in high-power electroenergetic systems to ensure high quality, economy and safety of these systems. The GAES relates to electric energy accumulation equipment in which the unclaimed electric energy is converted by means of an electrically-driven compressor ( 3, 4, 6 ) into the air compression heat working medium-air (WMA) and WMA pressure potential energies accumulated in Underground Heat Accumulator (UHA) ( 14 ) and, in case of the demand, these potential energies from UHA ( 14 ) by means of the WMA turbine ( 18, 19 ) and the turbogenerator ( 21 ), converted back into electric energy. The principal novelty of the proposed GAES is that UHA ( 14 ) is formed in the aquifer ( 15 ) which, at the same time, is the storage of the compressed WMA. UHA ( 14 ) is conditioned to the WMA pressure (volume), temperature, moisture ensuring agreement of these parameters with certain parameters of the UHA ( 14 ) operation. A thermos-type pressure duct ( 13 ) has developed for the transfer of the WMA into/out of UHA ( 14 ). A rock cementation method has been worked out. The GAES can be formed on the aquifer ( 15 ) base at the depth from 150 to 700 m. The GAES ensures practically unlimited energy capacity and a high coefficient of efficiency of about 85%.