Cryogenic liquid-air energy storage uses very low-temperature liquids to store energy, typically in liquid air.The prime focus of this process is storing large-scale electricity. Hence it is a form of battery, albeit not portable. We wrote this article because we believe anything that can safely store renewable energy is good for our planet.
How Grid-Scale Cryogenic Liquid-Air Energy Storage Works
A cryogenic liquid-air energy storage entrepreneur purchases electricity at bulk, paying off-peak rates. They use this energy to cool air from the atmosphere to -195º C / -319º F.
After the air has liquefied it only takes one thousandth of the volume of the original gas. This liquefied gas can store in a large vacuum flask at normal atmospheric pressure for a long time.
However, the liquefied gas can convert back to its original state by warming it again. When the utility calls for more power during demand peaks, the entrepreneur pumps the cryogenic liquid at high pressure into a heat exchanger.
The warming liquid expands a thousand times as it returns to its original state of air. The massive increase in volume and pressure is sufficient to drive a turbine, and deliver electricity to the grid.
New 300-Megawatt-Hour Liquid Air Project Announced
BBC News confirmed a new cryogenic liquid-air energy storage project in the United Kingdom on June 14, 2024. The media says work has already begun to store surplus wind and solar energy at Carrington near Manchester.
The company concerned, Highview Power, has confirmed that funding will come from a variety of sources including UK Infrastructure Bank. This is a private limited company entirely owned by the UK government.
The project is apparently the first commercial-scale venture of this kind. The Carrington location is close to wind farms in the Irish Sea and Scotland, and will be able to store its energy for weeks, even months.
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