Storage of Excess Heat in Cold Side of Heat Engine
3 Assignments
0 Petitions
Accused Products
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.
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Citations
40 Claims
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1-20. -20. (canceled)
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21. A system comprising:
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a compressor; 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 hot side heat exchanger, the turbine, 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 (22, 23, 24, 25, 26, 27, 28, 32, 33, 34, 35)
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29. A system comprising:
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a compressor; 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 hot side heat exchanger, the turbine, 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 (30, 31)
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36. 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 path including, in sequence, a compressor, a hot side heat exchanger, a turbine, 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 (37, 38, 39, 40)
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Specification