If you look at diagrams of the International Space Station you'll see they have rather large radiators, so it does work in space. They're always positioned in

If you look at diagrams of the International Space Station you'll see they have rather large radiators, so it does work in space. They're always positioned in shade to radiate heat most efficiently. It's the two long pieces labeled 11 in this diagram: https://www.nasa.gov/sites/default/files/thumbnails/image/its_2.jpg https://www.nasa.gov/sites/default/files/thumbnails/image/it...