Geothermal heating provides unlimited fuel for people in houses, staying still.
The technology is similar, and it's boring ;-) The market is different. This is an opportunity for entrepreneurs to hire expert drilling engineers out of the oil industry!
This sounds like the beginning of a great sci-fi novel.
A future where Earth's core has cooled because of excess draws to power humanity. Now, the planet is losing it's magnetic field.
To save humanity, humans need to re-heat the core, build biospheres, or leave the planet.
Has anyone done the napkin math for how long that would take?
https://www.forbes.com/sites/alexknapp/2013/04/28/the-center...
Core of earth: 6,000 ºC
https://www.space.com/why-sun-atmosphere-hotter-than-surface
Core of sun: 27 million ºC Surface of sun: 6,000 ºC
"The leading idea among experts is the sun's magnetic field is actually bringing energy from inside the sun up through its surface and into its atmosphere."
The "napkin math" will involve gathering some data about RF power harvesting, and some assumptions (e.g. cosmic rays)
https://news.mit.edu/2020/energy-harvesting-wi-fi-power-0327
https://en.wikipedia.org/wiki/First_law_of_thermodynamics
Do you believe in the 1st law of thermodynamics, that energy is neither created nor destroyed?
https://en.wikipedia.org/wiki/One-electron_universe
We could just balance the system:
core of Earth too hot -> use geothermal
core of Earth too cold -> use solar power
https://news.ycombinator.com/item?id=30476002
It's even more interesting that you mention the magnetic field, could we use solar panels to draw more energy from the sun to power a tesla coil and microwave the core?
(it was not great)
Whereas for geothermal, conventional drilling isn't useful enough for it.