Quote:
Originally Posted by freebeard
Your search term: '[*your_state} hot springs'
I like the concept of the water-to-water-to-air heat exchanger. A tank at the bottom of a well with two pipes down to it, and a DNA spiral inside the tank. The 'dirty' water never goes anywhere.
For economical reasoning purposes, lower tank is 6-8" PVC tens of feet long, with a loose copper spiral.
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Turbines would require 500-F, dry, super-heated stream, requiring equivalent down-hole temperature.
Way beyond the capability of PVC plastic.
If corrosive hot brine were present, we'd be looking at stainless steel.