Human in deep space in spacesuit, do they need a heater?

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SUMMARY

In deep space, a spacesuit primarily relies on the heat generated by the human body, with insulation playing a crucial role in minimizing energy loss. Theoretical calculations indicate that a 1 square meter object at body temperature emits approximately 480 watts of blackbody radiation, while the human body requires about 140 watts for light work. Spacesuits are designed to manage heat dissipation rather than provide heating, complicating thermal regulation. NASA's spacesuit contracts have shifted from Hamilton-Sundstrand to smaller companies, reflecting changes in the industry.

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Say I have a space suit that is heated only by the heat generated by my body and I am located in deep space where the only heat is from the microwave background. If I kept putting more and more of the best insulation around me will I stay warm? Is there a theoretical limit to how much I can minimize my energy loss?

Thanks for any help!
 
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Unless you are naked in space, keeping warm isn't the problem, keeping cool is. If I did the math right, blackbody radiation of a 1 square meter object with good emissivity at body temp is about 480w. Including condensing the water we breathe, the human body needs to dissipate about 140w when doing light work (astronaut work is not that light). Throw on a pressure suit and it becomes tough to remove that heat. Thus, spacesuits aren't typically equipped with heat, they are just cooled.
 
Nope. Hamilton got to play a bit part as a small Oceaneering subcontractor in exchange for dropping their protest.
 

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