Why not just bury half of a serling engine underground, then let the natural heat difference between the underground and above ground sections to run the engine, you could generate nearly "free" energy with this.

>he knows

OTEC makes a bit more sense because ocean currents carry the heat whereas the geothermal needs a km of pipes.

>>16718100 (OP)
Natural heat difference stops being a heat difference really fast when you install a heat engine in the ground.

>>16718100 (OP)
Congratulations. You just invented geothermal energy. If only there were a billion dollar industry that was motivated to do basically what you're describing but more efficiently.

I hate entropy so much its unreal

>>16718298
The underground portion will be naturally cooler while the upper portion is heated by the sun then due to residual heat run although at reduced capacity. It might not make much power but it theoretically would still make power just using natural energy to run.

>>16718100 (OP)
Build it then, smartguy.