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Thermal energy storage apparatus enabling use of aqueous or corrosive thermal storage media

  • US 5,239,839 A
  • Filed: 06/17/1991
  • Issued: 08/31/1993
  • Est. Priority Date: 06/17/1991
  • Status: Expired due to Term
First Claim
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1. A holdover plate for thermal energy storage in refrigeration and air conditioning systems, said holdover plate comprising:

  • a heat exchanger with an adjacent space in close proximity thereto;

    a plurality of expandable capsules containing a thermal energy storage medium, said capsules substantially filling said adjacent space and said capsules including means to provide for expansion of the thermal energy storage medium without altering outer envelope dimensions of said capsules;

    a containment means forming an exterior of said holdover plate and surrounding said heat exchanger and said adjacent space filled with said capsules, said containment means further containing a convective coupling fluid which thermally couples and is non-corrosive to said heat exchanger, said capsules, and said containment means;

    and wherein said convective coupling fluid transfers heat primarily through natural convection and conduction and does not freeze at operational temperatures of said heat exchanger.

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