Importance

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Abstract

A system includes a discharge subsystem with at least one expander stage operable to expand and heat a high-pressure CO2 stream from an existing CO2 pipeline to generate power and output a low-pressure CO2 stream to a storage media. A charge subsystem includes at least one compression stage operable to compress and cool the low-pressure CO2 stream from the storage media and provide a recycle high-pressure CO2 stream to the existing CO2 pipeline. A thermal integration subsystem is in fluid communication with the at least one expander stage and at least one compression stage to provide heating duty and cooling duty for the heating and cooling operations, respectively. The system relies on the existing CO2 pipeline for storage of high-pressure CO2 to provide the benefits described in the disclosure. Related methods are also contemplated.

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First Claim