this post was submitted on 14 Sep 2024
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[–] nutsack -5 points 2 months ago (3 children)

you could use space that shit is called as balls

[–] [email protected] 10 points 2 months ago (2 children)

The temp is low but it is a vacuum. Vacuums are bad at dissipating heat. Think of the vacuum walled drinking vessels. They are so efficient at keeping beverages hot/cool because the vacuum insulates the majority of the surface area that heat can move across.

Likewise a cooling tank of water (typical nuclear reactor design) itself surrounded by vacuum, will not cool efficiently at all. Presumably they'd have to use piping to circulate the water over a large surface area of some other medium like the moon rock itself.

[–] Plopp 4 points 2 months ago (1 children)

I've got it. Since we're worried about rising sea levels on earth, we can just pipe the excess water to the moon and flood the moon's surface with water and use that for cooling.

[–] Shard 2 points 1 month ago

Hello, Nobel prize foundation?

Yes, this man right here!

[–] [email protected] 2 points 2 months ago (1 children)

Vacuums are bad at dissipating heat.

They're also very good at not stopping infrared radiation.

[–] [email protected] 2 points 1 month ago* (last edited 1 month ago)

The IR band gap is high enough that you'd need really efficient heat pumps to keep things radiating well. Otherwise the heat pumps generate more heat than you can radiate.

[–] PugJesus 10 points 2 months ago

Dissipating heat in space is actually one of the major issues that comes up in designs for space applications. It's... not easy.

[–] Exusia 6 points 2 months ago (1 children)

Cooling is the process of offloading heat from one atom to another. In space and the moon, there's very little....anything. You can't transfer heat onto nothing - so an "air cooled" heat vent doesn't work. Another user suggested they use the moon itself or moon dust as a heat sink, and you could do that in theory.

[–] [email protected] 2 points 2 months ago (1 children)
[–] [email protected] 1 points 1 month ago

Since we're being pedants, that's moving heat through nothing, not transferring it to nothing.

Not that it's a viable means of heat removal for a reactor.