Storage of excess heat in cold side of heat engine
First Claim
Patent Images
1. A system comprising:
- a compressor;
a recuperator;
a hot side heat exchanger;
a turbine;
a cold side heat exchanger;
a cooling heat exchanger; and
a working fluid circulating in a closed cycle path through, in sequence, the compressor, the recuperator, the hot side heat exchanger, the turbine, the recuperator, the cooling heat exchanger, and the cold side heat exchanger in both a charge mode and a discharge mode, wherein the cooling heat exchanger is configured to remove heat from the working fluid.
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Abstract
Extra heat in a closed cycle power generation system, such as a reversible closed Brayton cycle system, may be dissipated between discharge and charge cycles. An extra cooling heat exchanger may be added on the discharge cycle and disposed between a cold side heat exchanger and a compressor inlet. Additionally or alternatively, a cold thermal storage medium passing through the cold side heat exchanger may be allowed to heat up to a higher temperature during the discharge cycle than is needed on input to the charge cycle and the excess heat then dissipated to the atmosphere.
165 Citations
20 Claims
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1. A system comprising:
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a compressor; a recuperator; a hot side heat exchanger; a turbine; a cold side heat exchanger; a cooling heat exchanger; and a working fluid circulating in a closed cycle path through, in sequence, the compressor, the recuperator, the hot side heat exchanger, the turbine, the recuperator, the cooling heat exchanger, and the cold side heat exchanger in both a charge mode and a discharge mode, wherein the cooling heat exchanger is configured to remove heat from the working fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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a compressor; a recuperator; a hot side heat exchanger; a turbine; a cold side heat exchanger; a working fluid circulating in a closed cycle path through, in sequence, the compressor, the recuperator, the hot side heat exchanger, the turbine, the recuperator, and the cold side heat exchanger in both a charge mode and a discharge mode; a cold side thermal storage (“
CTS”
) medium;a first CTS tank; an intermediate CTS tank; a CTS heat exchanger, wherein the CTS heat exchanger is configured to remove heat from the CTS medium; a second CTS tank; a first flow path configured to flow CTS medium from the first CTS tank, through the cold side heat exchanger, and to the intermediate CTS tank; and a second flow path configured to flow CTS medium from the intermediate CTS tank, through the CTS heat exchanger, and to the second CTS tank. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method comprising:
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in a closed cycle system operating in a power generation mode, circulating a working fluid through a closed cycle fluid path including, in sequence, a compressor, a recuperator, a hot side heat exchanger, a turbine, the recuperator, and a cold side heat exchanger in both a charge mode and a discharge mode; flowing a cold side thermal storage (“
CTS”
) medium at a first variable flow rate from a first CTS tank, through the cold side heat exchanger and in thermal contact with the working fluid, and to an intermediate CTS tank; andflowing the CTS medium from the intermediate CTS tank, through a CTS heat exchanger, and to a second CTS tank, wherein the CTS heat exchanger is configured to remove heat from the CTS medium. - View Dependent Claims (17, 18, 19, 20)
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Specification