Pumped thermal storage cycles with turbomachine speed control
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United States of America Patent
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Sep 12, 2023
Grant Date -
Feb 10, 2022
app pub date -
Oct 25, 2021
filing date -
Sep 27, 2012
priority date (Note) -
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Abstract
The present disclosure provides pumped thermal energy storage systems that can be used to store electrical energy. A pumped thermal energy storage system of the present disclosure can store energy by operating as a heat pump or refrigerator, whereby network input can be used to transfer heat from the cold side to the hot side. A working fluid of the system is capable of efficient heat exchange with heat storage fluids on a hot side of the system and on a cold side of the system. The system can extract energy by operating as a heat engine transferring heat from the hot side to the cold side, which can result in network output. Systems of the present disclosure can employ solar heating for improved storage efficiency.
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