Application of Air-Tight Sheet in the Storage Tank for the Generation of Electricity by the Compressed Air Energy Storage Gas Turbine System (CAES-G/T)

The CAES-G/T requires storage of compressed air at a maximum pressure of around 8Mpa. With a view to achieve practical CAES-G/T system, air-tight lining structure was proposed and have been investigated. The properties required for air-tight lining structure are that they should be sufficiently pressure-resistant and air-tightness. Among some polymers we selected isobutylene-isoprene rubber for most adaptable material. In addition, to verify the applicability of air-tight lining structure, In-situ Storage Test was performed using a test cavern. The results have demonstrated that the air-tightness requirement was met, but measurements showed evidence of a slight degree of leak from the air-tight sheet. Therefor, after the completion of the test, the facility was removed to clarify the causes of problems and to establish the appropriate measures to improve the design. This paper reports a study of selection of air-tight sheet and results of In-situ storage test.