Re:Geothermal's path to relevance: cheap drilling
by serpix on Tuesday October 26, 2021 @03:51PM
(#29005400)
that is a ground-source heat pump as the heat energy is mostly from ambient solar. But yes very common and I used to have one in my home before I moved away. It cost practically nothing to keep the house at t-shirt temperature during -25c cold weather snaps.
[ Parent
| on HN ]
Re:Geothermal's path to relevance: cheap drilling
by larsalmen on Tuesday October 26, 2021 @04:49PM
(#29006081)
No it's not.
The bore-hole is lined with a outer steel pipe until the drill hits bedrock, keeping it very much insulated from the ground.
And the upper-most part of the energy-well that's lined is considered inactive, and is not counted in the "150 m deep energy well".