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by piloto_ciego 33 days ago
Admittedly it is not my field, but back of the envelope calculations in a sun synchronous orbit with the radiators pointed towards deep space seem pretty plausible with about 1.3 to 1.7 ratio of solar area to radiator area.

Like, it's not "great" but if you're not flying around the sun every 72 minutes or whatever and you can keep your panels sun on and radiate into deep space, the numbers aren't bananas.

4 comments

But you need a lot of fluid or gas to move the heat in that radiator system, whereas solar has the benefit of extremely efficiently moving power around at great distances through wiring or integrated bus bars.

And you need to get the heat away from the central point to the extremities of the radiator as much as possible. So you can maximize how much energy can be radiated away.

Seems like the weight of the system would be an issue with whatever gas or liquid you used to fill those radiators, but maybe I'm wrong...

Scott Marley’s got a video on it. The numbers work out.
I dunno I was listening to someone explain this on a podcast and to put up something on the scale of a typical land based data center would make it, by orders of magnitude, the largest spaced based object ever made and most of the size would be the radiators.
Also, you have to iradiate towards a space area which is not occupied by Earth. Ideally you go to Lagrange points with the datacenter but not around the earth.
Is that ratio just for collecting the sun's energy. Or does it include using it?
I sized for an H100, so using it.