COMPRESSED AIR ENERGY STORAGE AND POWER GENERATION DEVICE AND COMPRESSED AIR ENERGY STORAGE AND POWER GENERATION METHOD

摘要

A compressed air energy storage and power generation device 2 comprising a compressor 10, a pressure accumulation tank 12, and an expander 14. The compressor 10 is driven by a motor 30 using renewable energy and compresses air. The pressure accumulation tank 12 stores compressed air. The expander 14 is driven by the compressed air. A power generator 28 is mechanically connected to the expander 14 and generates power. In addition, the device 2 comprises a first heat exchanger 18 that recovers compressed heat, a heat medium tank 20 that stores a heat medium, and a second heat exchanger 22 that heats the compressed air. The device 2 also comprises a first pump 46 and a control device 48a. The first pump 46 adjusts the amount of heat medium supplied to the first heat exchanger 18. The control device 48a controls the first pump 46 and adjusts the amount of heat medium supplied to the first heat exchanger 18 such that the heat medium stored in the heat medium tank 20 is maintained at a prescribed first temperature. As a result, a compressed air energy storage and power generation device 2 capable of maintaining high charge/discharge efficiency is provided.