[76834]

I tend to agree.
The I²R losses would be more that practical unless you had humongous conductors.
Go back to my initial thought of water, steam , condensate method.
Very similar to the Frasch Process for extracting sulphur but in reverse.
Cold water goes down and hot water/steam comes up.

[spinestein]

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[spinestein]

I do like the water idea, though.