What types of electric generation that aren’t heat related? I can think of wind and solar, and hydro? But nuclear and fossil fuels are steam, aren’t they?
You answered your own question - correct on all counts! 😊 There are really very few physical principles to base power generation technology off to begin with; it’s all going to come down to either inducing a current in a conductor by spinning a magnetic field (molten salt solar, nuclear, fossil fuels, hydro, wind, and anything else involving a turbine at any point all operate on this principle), or inducing a current by futzing with quantum mechanics (photovoltaic cells alone operate off this principle, as far as I understand such things - and I understand just enough to know I understand nothing at all).
