Compressed air-brine energy storage

Sidney Loeb

Energy, 1988, vol. 13, issue 2, 183-190

Abstract: Compressed air-brine energy storage (CABES) is similar to ordinary compressed air energy storage (CAES). However, in CABES, the heat of compression of the air is stored via a surface-type heat exchanger in water or, preferably, concentrated brine contained in an unpressurized reservoir. Furthermore, the brine is stratified into a hot, lower density, upper layer and a cold, higher density, lower layer, thus eliminating half the needed reservoir volume. In the energy delivery phase the hot brine heats the compressed air prior to its expansion through an expander/generator to recover the stored electric energy. Calculations on a three-stage CABES plant indicate that: 1.(1) the overall electric efficiency is at least 67%;2.(2) the energy storage density of the brine is 0.016 m3 per electric kWh delivered from storage;3.(3) the required unit heat transfer surface is 0.27 m2 per electric kWh;4.(4) the contribution of the reservoir and heat exchanger costs to the cost of electric energy delivered from storage is not excessive.

Date: 1988
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:13:y:1988:i:2:p:183-190

DOI: 10.1016/0360-5442(88)90044-8

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