CAES plant using steam injection and bottoming cycle expander

摘要

A system and method are provided for a compressed air energy storage (CAES) system. The system and method may include compressing a process gas with a compressor train to produce a compressed process gas. The compressed process gas may be directed to a compressed gas storage unit and stored therein. The compressed process gas from the compressed gas storage unit may be released to a heat recovery unit via a feed line. The heat recovery unit may heat the compressed process gas and direct the heated compressed process gas to an expansion assembly to generate a power output. Feed water from a feed water source may be heated in the heat recovery unit to produce steam for injection into a combustion turbine assembly. The combustion turbine assembly may heat the heat recovery unit via an exhaust line.

主权项

1. A method for operating a compressed air energy storage system, comprising:
compressing a process gas with a compressor train to produce a compressed process gas; directing the compressed process gas to a compressed gas storage unit and storing the compressed process gas in the compressed gas storage unit; releasing the compressed process gas from the compressed gas storage unit to a heat recovery unit via a feed line; heating the compressed process gas in the heat recovery unit and directing the heated compressed process gas to an expansion assembly to generate a power output; feeding feed water from a feed water source to the heat recovery unit and heating the feed water to produce steam; introducing the steam from the heat recovery unit to a combustion turbine assembly; and heating the heat recovery unit with the combustion turbine assembly via an exhaust line.