Calculating the size of a space radiator

1:28:56now at standard 30° C, so that's 300 Kelvin. If I want to dump 1 megawatt of heat, I would need 2,000 m squared. That's 8 tennis courts. And I want to dump just as much energy that's coming in, right? Because if if I don't dump the energy that's coming in, then my temperature increases. And then the electronics are not stable. My satellite keeps increasing in temperature. So whatever energy is coming in, I'd like to dump out. So 1 megawatt in 1 megawatt out the what matters is the temperature that I'm operating at. Okay. Now if 1 megawatt is coming in and now let's say I'm operating at 300° C, that's around 600 Kelvinish.

1:29:37My area has gone down to 150 m squared. I've gone from 2,000 m squared to 150 me squared. That's a reduction of 90%. Right? If I go even further because this thing was at 700° C, right? If I go even further to 600° C now, meaning 900 Kelvin, now my radiators only need to be 30 m squared. And that's totally doable. >> Yeah, that's very reasonable. >> Right. That's that's already in the ballpark of stuff that we've already put out there. >> Right. Right. Right. Right. That's so fat. It's it for me it's a little counterintuitive where it's at the higher you know when you before we started this the higher the temperature

1:30:18the less surface area you need to dissipate >> the heat. It doesn't feel >> Yeah. As long as the stuff is not cooking. >> Right. >> Right. But like it kind of makes sense because um like if you think about like you know those like electric stoves with the coils >> Yeah. >> right? The the higher the temperature the more the more heat is coming out. That's the whole point of how it cooks stuff. that. No, >> right. I mean, no, I guess that's not true because there's like contact, but you get what I'm saying, right? Like, if you're around that thing, >> Yeah, I know what you mean. >> It's like there's there's a lot more photons that are coming out. So, you're dumping a lot more energy and as long as you can live >> in that >> at 700° C, you're good to go. >> And it's just because we've never been able to think about it because we've

1:30:58never been able to operate that temperature level. So, it's never was even a possibility. >> There were no chip components that could withstand that temperature. So everyone was doing these calculations at the lower temperature being like oh I need tennis court sized 4 km squared size but now I've reduced stuff down to like 95 99% the area just because my components can withstand the higher temperature my components my computer can be hotter and so the amount of radiator I need is a lot lot lower by t to the 4th >> this is so I mean you know again there is the industrial scale and all of these other, you know, engineering. But, but to the point you brought up earlier, a

1:31:40lot of the narrative and rhetoric has been dismissive on its face in a way that doesn't even take into account