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SYSTEMS AND METHODS FOR ENERGY STORAGE AND RETRIEVAL

  • US 20150260463A1
  • Filed: 03/25/2015
  • Published: 09/17/2015
  • Est. Priority Date: 09/27/2012
  • Status: Active Grant
First Claim
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1. An energy storage and retrieval system, comprising:

  • a compressor;

    a first heat storage unit;

    a turbine;

    a second heat storage unit;

    a working fluid that flows along a fluid flow path in a closed cycle including, in sequence, the compressor, the first heat storage unit, the turbine, and the second heat storage unit; and

    an auxiliary tank comprising the working fluid, wherein the auxiliary tank is in fluid communication with the fluid flow path of the closed cycle; and

    wherein the system alternately operates as both (i) a heat engine to provide mechanical work from heat and (ii) as a heat pump to use mechanical work to store heat.

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