Gravel power storage may be key to worldwide green energy use – SlashGear

See on Scoop.itMicro generation – Energy & Power systems

Gravel power storage may be key to worldwide green energy use SlashGear Jonathan Howes, James Macnaghten, and Mark Wagner have created a company called Isentropic which has invented this “pumped-heat electricity storage (PHES)” machine which they suggest will demonstrate an output of 1.5 megawatts of power. To do this, the machine takes surplus energy (from solar power stations or wind) to run a motor which operates a compressor to squeeze its argon gas. The gas gets hot (500 degrees C hot, as it were), and the gas heats the gravel as it travels through the first silo.

See on www.slashgear.com

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