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A comment on How cheap does solar power need to get before it takes over the world?. Parent comment

Re:How cheap does solar power need to get before it takes ov... by evgen on Tuesday April 19, 2016 @05:59AM (#11525891)
Doesn't this run into insulating problems for the resevoir? How do you prevent the pressure from being lost as heat?
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Re:How cheap does solar power need to get before it takes ov... by dredmorbius on Tuesday April 19, 2016 @11:50AM (#11527798)
Rock is a pretty good insulator.

Anythhing exposed to fluid isn't. Groundwater flws, tanks in air.

I'm not sure about possible ignition explosion risk from residual methaane or hyrogen, say.

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