Cryogenic Battery could be the best option to make renewables much cheaper and greener

Cryogenic energy storage or cryogenic battery is the use of low-temperature liquids (cryogen) such as liquid air or liquid nitrogen as energy storage (battery). But how does it work?

First, the ambient air is filtered to remove impurities. Impurities such as water and CO2 freeze into solid ice during the process, therefore the resulting air is compressed and chilled. This is in order to liquefy use electricity to chill the air to -196C.

Next, the liquid air which takes up one-thousandth of the volume of the gas can be kept for a long time in a large vacuum tank at atmospheric pressure. According to The Guardian, unlike traditional lithium-ion batteries, which typically store electricity for a few hours, the cryogenic battery will be able to store energy for months.

Finally, the liquid air is pumped at high pressure into a heat exchanger, which acts as a boiler. The massive increase in the volume and pressure during gasifying the liquid air is used to drive a turbine or generator to produce electricity.

The story continues in the next post…

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Source:@wikipedia & @Solar_Edition

Photo:@Solar_Edition

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