High-efficiency liquid heat exchange in compressed-gas energy storage systems
First Claim
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1. A method for improving efficiency of a compressed-gas energy storage and recovery system, the method comprising:
- within a cylinder assembly, compressing gas from a first pressure to a second pressure larger than the first pressure, thereby storing energy;
during the compression, introducing a heat-transfer fluid into the cylinder assembly to exchange heat with the gas, thereby increasing efficiency of the energy storage, a portion of the gas dissolving into the heat-transfer fluid;
exhausting from the cylinder assembly gas at the second pressure, at least a portion of the heat-transfer fluid remaining in the cylinder assembly; and
thereafter, recovering energy from gas effervescing from the heat-transfer fluid in the cylinder assembly.
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Abstract
In various embodiments, efficiency of energy storage and recovery systems employing compressed air and liquid heat exchange is improved via control of the system operation and/or the properties of the heat-exchange liquid.
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20 Claims
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1. A method for improving efficiency of a compressed-gas energy storage and recovery system, the method comprising:
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within a cylinder assembly, compressing gas from a first pressure to a second pressure larger than the first pressure, thereby storing energy; during the compression, introducing a heat-transfer fluid into the cylinder assembly to exchange heat with the gas, thereby increasing efficiency of the energy storage, a portion of the gas dissolving into the heat-transfer fluid; exhausting from the cylinder assembly gas at the second pressure, at least a portion of the heat-transfer fluid remaining in the cylinder assembly; and thereafter, recovering energy from gas effervescing from the heat-transfer fluid in the cylinder assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification