Abstract: A system comprising two or more thermal stores, a single store for pressurised air and a means of collecting relatively low-grade heat offers the potential for an energy storage system that achieves two desirable aims at the same time: (i) the total exergy that may be released when a given pressurised air store is discharged is maximised and (ii) the ratio between the exergy extracted and the work invested in compressing the air via a multi-stage compressor is also increased by exploiting some source of low-grade heat to augment the thermal content of several thermal stores. The system comprises a compressed air energy storage system which tends, in any one fill-empty cycle of the pressurised air store, to pump heat upwards in temperature from lower-grade stores to the highest-grade thermal store as well as a thermal capture subsystem that can augment the heat content of the lower-grade thermal stores.
Type:
Grant
Filed:
December 5, 2016
Date of Patent:
February 16, 2021
Assignee:
Cheesecake Energy LTD.
Inventors:
Seamus Garvey, Bruno Cárdenas, Bharath Kantharaj, Michael Simpson, Andrew Pimm, James Garvey, Paul Codd
Abstract: A system comprising two or more thermal stores, a single store for pressurised air and a means of collecting relatively low-grade heat offers the potential for an energy storage system that achieves two desirable aims at the same time: (i) the total exergy that may be released when a given pressurised air store is discharged is maximised and (ii) the ratio between the exergy extracted and the work invested in compressing the air via a multi-stage compressor is also increased by exploiting some source of low-grade heat to augment the thermal content of several thermal stores. The system comprises a compressed air energy storage system which tends, in any one fill-empty cycle of the pressurised air store, to pump heat upwards in temperature from lower-grade stores to the highest-grade thermal store as well as a thermal capture subsystem that can augment the heat content of the lower-grade thermal stores.
Type:
Application
Filed:
December 5, 2016
Publication date:
January 3, 2019
Applicant:
Cheesecake Energy Ltd.
Inventors:
Seamus GARVEY, Bruno CÁRDENAS, Bharath KANTHARAJ, Michael SIMPSON, Andrew PIMM, James GARVEY, Paul CODD