Its running for 15 minutes and then must shut down for a long time to cool down. Thats exactly why those "science-fluencers" said its a dumb idea. This is far away from proving that its a viable idea.
_Radiative cooling_ is the only option because it's in vacuum. But you can transfer heat to the radiator either passively (using thermal conductivity), or actively (using coolant). The second option allows to effectively use larger radiators.
BTW, we seem to have Noisesphere instead of Noosphere.
> The cooling system will only be able to operate in brief spurts of about 15 minutes. After that, the TPUs need to shut down to allow the radiators to catch up.
What you said was just a statement, not something with evidence or reasoning for why it should work. How large of an area is required to dissipate that much heat in a vacuum at a constant rate?
1m² of perfect black body in vacuum at 343K should emit about 700W, according to the Stephan-Bolzmann formula. Should do for a consumer GPU, or an H100.
Since the heat distribution over the radiator is not ideally uniform, I suppose that the emitted power will be less, if they want to keep the chips at 70C.
Since the temperature has the fourth power in the formula, having the GPU work at 100C would increase the radiator efficiency quite a bit.
Curious to see if the experiment changes our understanding of space radiators at a certain scale for non-space exploration purposes.