Compressed air expands

Isothermal compressed air energy storage (ICAES) technology enables a site-anywhere, zero-emissions storage solution. Photo credit: SustainX

Isothermal compressed air energy storage (ICAES) technology enables a site-anywhere, zero-emissions storage solution. Photo credit: SustainX

It looks like compressed air energy storage (CAES) may have come of age as a utility-scale technology, with SustainX pushing the button on its 1.5MW installation in New Hampshire, US, last week. The isothermal plant is the first of its kind to go live, and thus the first bulk-scale CAES project that does not require additional fuel such as natural gas to reheat the compressed air on its release cycle.
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