THERMOELECTRIC ENERGY STORAGE SYSTEM AND METHOD FOR STORING THERMOELECTRIC ENERGY
First Claim
1. A thermoelectric energy storage system for providing thermal energy to a thermodynamic machine for generating electricity, comprising:
- a heat exchanger which contains a thermal storage medium; and
a working fluid circuit for circulating a working fluid through the heat exchanger for heat transfer with the thermal storage medium, such that the working fluid will undergo a transcritical process during heat transfer.
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Accused Products
Abstract
A system and method for thermoelectric energy storage are disclosed. A thermoelectric energy storage system can include a heat exchanger which contains a thermal storage medium, and a working fluid circuit for circulating a working fluid through the heat exchanger for heat transfer with the thermal storage medium. The working fluid undergoes transcritical cooling during the charging and transcritical heating during the discharging cycle as it exchanges heat with the thermal storage medium. Improved roundtrip efficiency can be achieved through minimizing the maximum temperature difference (ΔTmax) between the working fluid and the thermal storage medium during operating cycles.
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Citations
16 Claims
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1. A thermoelectric energy storage system for providing thermal energy to a thermodynamic machine for generating electricity, comprising:
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a heat exchanger which contains a thermal storage medium; and a working fluid circuit for circulating a working fluid through the heat exchanger for heat transfer with the thermal storage medium, such that the working fluid will undergo a transcritical process during heat transfer. - View Dependent Claims (2, 3, 4, 5, 6, 11, 12, 13, 14)
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7. A method for storing thermoelectric energy in a thermoelectric energy storage system, comprising;
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circulating a working fluid through a heat exchanger for heat transfer with a thermal storage medium; and transferring heat with the thermal storage medium in a transcritical process. - View Dependent Claims (8, 9, 10, 15, 16)
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Specification