It’s pretty much the only pathway to make heat spin a turbine.
Comment on Reactor goes brrr
undefined@lemmy.hogru.ch 3 months agoI never understood that either. It seems like the steam production is an extra step.
someguy3@lemmy.world 3 months ago
booly@sh.itjust.works 3 months ago
Well, efficiently, at least.
You can always heat up a hot air balloon and have it yank a system of pulleys, but you’re gonna lose a lot of energy that way.
gens@programming.dev 3 months ago
Turning heat into mechanical or chemical or electric energy directly is really hard, you know.
It’s funny that you can get more energy from gas by using it to heat water and using a steam turbine to drive whatever. It’s just not always practical.
wander1236@sh.itjust.works 3 months ago
I’m not really sure how else you’d do it. The energy we can get out of fission is in the form of heat, and steam isn’t as compressible as just gas and it’s easy to make with just heat. Combine that with electromagnetism giving you electricity by spinning some magnets around some coils, and there you go.
It’s probably possible to get some air hot enough and do some fancy convection work to get it to spin a rotor, but that’s going to be really inefficient.
You could also use the heat to make materials glow and put a solar panel nearby, but that’s also going to be pretty inefficient.
ryedaft@sh.itjust.works 3 months ago
Get beta radiation and then put the electrons directly into the wires.
Saber_is_dead@lemmy.world 3 months ago
One by one.
ryedaft@sh.itjust.works 3 months ago
Artisanal, hand wrought electricity.
Rakonat@lemmy.world 3 months ago
It’s just taking advantage of the change in matter state. H2O expands ~16,000 times it’s size when it boils from liquid water to gaseous steam. That increase in size means it wants to go somewhere else, we just control where it goes and it’s relief valve happens to be going through a spinning wheel with magnets on it, inducing currents in the coils of wire around the wheel.
Yes it’s way more complicated than that, but it’s the best way we have of turning heat into electricity, so it’s what we use. With the primary exception of solar, nearly every form of power production is using heat energy to indirectly spin a wheel.
Screen_Shatter@lemmy.world 3 months ago
So my general understanding is that you can use a magnet to create an electrical current. Its like it pushes the electrons, like a paddle pushing water. So they coil a bunch of wire around a magnet and rotate the magnet, which moves the electrons in the wire and that gets you electrical power. But you need something to push that magnet around, so you attach that to a big ass fan and use steam to push the fan. That’s your turbine. Nuclear power is just using a hot rock to make the steam. Hydroelectric power uses a river to push the turbine. Wind power is doing the same thing, just uhhh, with wind.
Vespair@lemm.ee 3 months ago
Jesus christ this comment deserves a noble prize. Incredibly succinct explanation of something I didn’t get before.
Yondoza@sh.itjust.works 3 months ago
Honestly, fantastic explanation!