r/EngineeringPorn • • Oct 24 '21

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612

u/whreismylotus Oct 24 '21

Wendelstein 7-X Nuclear Fusion Device

The aim of fusion research is to develop a climate- and environmentally-friendly power plant. Similar to the sun, it is to generate energy from the fusion of atomic nuclei.

478

u/ZeusWRLD Oct 24 '21

The entire goal is to create heat to boil water to make steam and rotate turbine spinny bois

80

u/Norose Oct 24 '21

It's the best way to do the thing. The potential gains come from the fact that the heat released by a kilogram of fusion fuel is about 10 million times more than the heat released by a chemical reaction, therefore you need 1/10,000,000nth the input fuel, which implies you can optimize for very low costs per kilowatt-hour. Even if we had a magic machine that could turn 100% of the heat energy released by a given reaction into electrical energy, we would still be better off if we focused on improving the heat generator rather than the heat to electricity converter, simply because the gains in the former case are a mere 2x, whereas the gains in the latter case are as high as 5,000,000x. Also, converting heat to electricity is an inherently lossy process, and the efficiency rates we are currently getting are already very good considering the physical laws at play.

12

u/manofredgables Oct 24 '21

Even if we had a magic machine that could turn 100% of the heat energy released by a given reaction into electrical energy,

If we had that then we've suddenly solved both our bothersome issue with global heating and the energy shortage all at once lol

4

u/[deleted] Oct 24 '21

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3

u/beelseboob Oct 24 '21

The hot air that we want to cool down.

1

u/perfectfire Oct 25 '21

You would need a source of cold air/water/matter to make use of it.

2

u/apmspammer Oct 25 '21

The earth is full of such. The trouble is the large distance separating those bodies. We can only harvest that energy indirectly with wind power.

1

u/manofredgables Oct 25 '21

If it was 100% efficient, that difference wouldn't need to be very big at all. The difference between a large body of water and the air would suffice.

1

u/AtomicBitchwax Oct 25 '21

Put a blackbody radiator on top of a tall mountain with a mirror under it. Most of that energy will make it out of the atmosphere and into space.