Utilization of circulating fluidized bed combustors for compressed air energy storage application

  • US 4,936,098 A
  • Filed: 05/13/1987
  • Issued: 06/26/1990
  • Est. Priority Date: 05/13/1987
  • Status: Expired due to Fees
First Claim
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1. A Compressed Air Energy Storage (CAES) system comprising:

  • an electrical machine for use as a motor during a compression mode and for use as a generator during an expansion mode;

    a compression train which compresses air and stores such compressed air in an air storage device during said compression mode, said compression train being selectively coupled to said motor by way of a first clutch means;

    a turbine train which expands said compressed air from said air storage device during said expansion mode, said turbine train being selectively coupled to said generator by way of a second clutch means;

    a heat recuperator for pre-heating said compressed air from said air storage device prior to expansion in said turbine train; and

    an atmospheric fluidized bed combustor (FBC) for further heating said compressed air from said pre-heating means prior to expansion in said turbine train, said atmospheric FBC including a combustion chamber for combustion of low-grade fuel, said combustion chamber having a fuel input, a bed of fluidizable solid particles, an input to receive said fluidizable solid particles, a primary combustion air inlet and a secondary fluidizing air inlet.

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