| 摘要 |
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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