COMPRESSED AIR ENERGY STORAGE TECHNOLOGY
Compressed air energy storage (CAES) uses surplus energy to compress air stored in the reservoir. The compression of the air generates heat. The air stored is then released to a turbine combustor to generate electricity. The aim, of course, is to save as much as possible unused renewable energy from the system. Then, when electricity is needed again, the compressed air is released and spins the turbine to unleash the power back for usage. The first such system was a 290MW plant developed by E.ON-Kraftwerk at Huntorf, Germany, in 1978. The intention was to help manage grid loads by storing electricity as pressurized air during nighttime when demand was low and rereleasing it when demand increased. The plant is still operationally used for backup power.
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