I worked on geothermal control systems a decade or so back. There are some less obvious applications for geothermal that reduce electric use (as opposed to generating electricity).
The systems I worked on were for cooling larger structures like commercial greenhouses, gov installations and mansions. 64° degree water would be pumped up from 400' down, run thru a series of chillers (for a/c) and then returned underground - about 20° or 25° warmer.
I always thought this method could be used to provide a/c for neighborhoods, operated as a neighborhood utility. I've not seen it done tho. I've seen neighborhood owned water supplies and sewer systems; it tells me the ownership part seems feasible.
In the nordics it is common to have ground source heat pumps (brine in closed circuit pipe or bore hole) that are run backwards in summer to cool the house while actually assisting in storing heat back in the ground to extract in the winter. It’s a bit like regenerative breaking on electric cars.
Shallow geothermal works fine for heating. And you can use the ground as a heat sink. But if you want to generate power, you need to get down to where temperatures can boil water. That's deeper than most oil wells. Fervo Energy claims to have found 270C at 3350 meters well depth. That's progress.
Oh, Fervo Energy again. They're trying to IPO, hence the hype.
Wikipedia's warning: This article reads like a press release or a news article and may be largely based on routine coverage. (February 2026)
This article may have been created or edited in return for undisclosed payments, a violation of Wikipedia's terms of use. It may require cleanup to comply with Wikipedia's content policies, particularly neutral point of view.
This isn’t really an evaluation of the company, just explaining how they had to use different financing approaches as they grew and derisked their technology (which makes sense).
Compared to some other new approaches for getting clean base load power, it seems like they’ve been pretty grounded and methodical.
It really is off-brand for this administration. They are only interested in energy sources you pull out of the ground, burn, and turn into CO2/pollution.
It has exclusivity which might be enough, you can't own the sun (modulo Simpsons episode) but you might be able to "own" geological hotspots for this purpose, the same way you can "own" a coal mine or an oil well. Remember the goal here is to create poverty. I mean, obviously you say you want to create "wealth" but only in a relative sense.
I worked on geothermal control systems a decade or so back. There are some less obvious applications for geothermal that reduce electric use (as opposed to generating electricity).
The systems I worked on were for cooling larger structures like commercial greenhouses, gov installations and mansions. 64° degree water would be pumped up from 400' down, run thru a series of chillers (for a/c) and then returned underground - about 20° or 25° warmer.
I always thought this method could be used to provide a/c for neighborhoods, operated as a neighborhood utility. I've not seen it done tho. I've seen neighborhood owned water supplies and sewer systems; it tells me the ownership part seems feasible.
In the nordics it is common to have ground source heat pumps (brine in closed circuit pipe or bore hole) that are run backwards in summer to cool the house while actually assisting in storing heat back in the ground to extract in the winter. It’s a bit like regenerative breaking on electric cars.
Shallow geothermal works fine for heating. And you can use the ground as a heat sink. But if you want to generate power, you need to get down to where temperatures can boil water. That's deeper than most oil wells. Fervo Energy claims to have found 270C at 3350 meters well depth. That's progress.
> if you want to generate power, you need to get down to where temperatures can boil water. That's deeper than most oil wells.
That’s going to be very dependant on location.
Here in NZ there are regions where water is boiling at surface level.
According to the below, 18% of our power is produced with it.
https://www.eeca.govt.nz/insights/energy-in-new-zealand/rene...
I think you're describing what is known as "district energy" systems.
Isn't that similar to how neighborhood heat pumps work?
https://www.araner.com/blog/district-heating-in-sweden-effic...
Oh, Fervo Energy again. They're trying to IPO, hence the hype. Wikipedia's warning: This article reads like a press release or a news article and may be largely based on routine coverage. (February 2026) This article may have been created or edited in return for undisclosed payments, a violation of Wikipedia's terms of use. It may require cleanup to comply with Wikipedia's content policies, particularly neutral point of view.
Here's a more realistic evaluation of Fervo.[1]
[1] https://www.latitudemedia.com/news/what-fervos-approach-says...
This isn’t really an evaluation of the company, just explaining how they had to use different financing approaches as they grew and derisked their technology (which makes sense).
Compared to some other new approaches for getting clean base load power, it seems like they’ve been pretty grounded and methodical.
> Trump has shown support for geothermal energy projects in his second term in office, unlike for other renewable energy sources,
He heard there was drilling involved
It really is off-brand for this administration. They are only interested in energy sources you pull out of the ground, burn, and turn into CO2/pollution.
It has exclusivity which might be enough, you can't own the sun (modulo Simpsons episode) but you might be able to "own" geological hotspots for this purpose, the same way you can "own" a coal mine or an oil well. Remember the goal here is to create poverty. I mean, obviously you say you want to create "wealth" but only in a relative sense.
They're pretty friendly to nuclear which comes out of the ground.
The whole continent of America made a breakthrough?