05 Mar '12, 3pm

Liquid Air for Utility-Scale Energy Storage?: It takes plenty of electricity to make air cold enough to turn f...

Liquid Air for Utility-Scale Energy Storage?: It takes plenty of electricity to make air cold enough to turn f...

It takes plenty of electricity to make air cold enough to turn from a gas into a liquid. What if you could reverse that process and turn that energy sink into a source of energy storage? U.K.-based Highview Power Storage is trying out just that technology right now, in a 300-kilowatt, 2.5 megawatt-hour pilot plant built at a Scottish & Southern power station outside London that’s feeding stored energy into the grid. Now the startup, which has raised £11 million ($17.4 million) of private investment to date, wants to build a 10-megawatt, 40 to 50 megawatt-hour facility, CEO Gareth Brett told me in an interview last week. At that scale, Highview is targeting total costs of about $1,000 per kilowatt, or about $500 per kilowatt-hour of energy stored, he said. That price is lower than most, if not all, of the battery-based grid storage technologies now being deployed for grid-s...

Full article: http://www.greentechmedia.com/articles/read/liquid-air-fo...

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