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Are you suggesting to basically harvest the thermal energy in the rock in a non-renewable fashion? I don't think that is very promising, the heat capacity of ro

by phreeza 11mo ago

Are you suggesting to basically harvest the thermal energy in the rock in a non-renewable fashion? I don't think that is very promising, the heat capacity of rock is not that huge. Back of the envelope calculation is drawing 1 GW from a cubic Kilometer of rock would lower the temperature by 1 degree C every 25 days. So I think you'd deplete a typical borehole quite quickly?

griffzhowl 11mo ago
> Are you suggesting to basically harvest the thermal energy in the rock in a non-renewable fashion? As I understand it, that's how many geothermal plants work, effectively mining the heat underneath them, but at a rate of extraction that means they would become uneconomical over a span of decades rather than months.