This week we want to share with you another curious technology of energy storage - compressed air energy storage (CAES) - a way to store energy generated at one time for use at another time.
For example, when the wind blows a wind turbine will produce power, but this power may be produced when there is no demand for it. At this time it becomes necessary to store the electricity, so it can be used when there is a peak in demand.
CAES plants can be compared to pumped-hydro power plants in terms of their applications. But, instead of pumping water from a lower to an upper pond during periods of excess power, in a CAES plant, ambient air or another gas is compressed and stored under pressure in an underground cavern or container. When electricity is required, the pressurized air is heated and expanded in an expansion turbine driving a generator for power production.
Compressed air energy storage is the second biggest form of energy storage currently behind pumped storage.
Did you find this technology interesting? Follow our posts to know more about batteries as an energy storage technology!