Nuclear power appears to be a powerful way to make steam that spins a turbine. Same with geothermal, wind, & hydro. Maybe not solar? Isn’t energy lost in the multiple energy conversions (heat, water state, kinetic)? Is it theoretically possible to have a power source that more directly moves electrons through a circuit? If solar is the only one that can, it’s limited in efficiency and where it can be used. What about power generation undersea or on Ganymede or something?
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You have more effects like Solar, but they are usually less efficient than spinning turbines. For example the Piezoelectric effect turns physical tension directly to electric voltage. Or the Peltier effekt turns heat to electricity. Oh and you can do it chemically in batteries and fuel cells, but then you need a constant supply of your chemicals from somewhere. Oh and nuclear batteries (RTG radioisotope thermoelectric generator) also have no moving parts.
These all work by using some outside force to kick an electron over a barrier and force it to take the long way back through your circuit
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