>That is not what ‘power source’ means. You probably want to read up on some thermodynamics and definitions. I’m guessing you think that if you connect the heat pumps output to it’s input, you’ll have infinite energy?
There is no answer in that whole comment to my question. However, you did answer it in the comment I am replying to:
> you pumped the energy inside and concentrated it a bit.
Yes! That's exactly right. But furthermore:
> You didn't generate more energy than you had before. You did make existing energy more useful for you, comfort wise.
This is exactly right, and it is also known as the first law of thermodynamics. [1]. There is no way to produce energy. Even with electrical generation from geothermal, we are moving energy and concentrating it a bit, as you say, just in different forms.
[1] https://en.wikipedia.org/wiki/First_law_of_thermodynamics