Compressed air energy storage gas turbine power system (CAES-G/T) and a pilot plant

摘要

Compressed Air Energy Storage Gas Turbine (CAES-G/T), which combustion air is compressed to high pressure in off-peak periods with excess energy and then stored in an underground storage cavern and in peak periods of power demand the compressed air is withdrawn from the cavern to supply for gas turbine, is coming up as a new type of technology for load leveling power system. New Energy Foundation (NEF) committed the technological development study on advanced load leveling power system by the government (MITI) is constructing a CAESG/T pilot plant at the disused Sunagawa Coal Mine site in Hokkaido on purpose to verify mainly the praticality and the safety of a built underground storage cavern in fissured hard rock bed, which is the first trial of its type in the world. Experimental operation of the pilot plant is scheduled in 2001. Including certification of the functions and the operational characteristics of the CAES-G/T, through operations such as storing high pressure air, holding it and releasing it, mainly, derived observation data on behaviors of the underground storage cavern, particularly on quantity of air leakage, temperature of the storage air, stress and deformation on the segments lining structure with joints and the interactive rock foundation, are comprehensively investigated. Consequently, an engineering apraisal of physically sound functions concerning both the airtight and the resisting pressure of the underground storage cavern can be done.