[fsh]

A sports car radiator has about that size and dumps 1 MW without boiling the coolant.

[alextingle]

A car's "radiator" doesn't actually lose heat by radiation though. It conducts heat to the air rushing through it. That's absolutely nothing like a radiator in a vacuum.

[fsh]

That's the point. Forced air cooling is way more efficient than radiative cooling.

[tsimionescu]

The question was about comparing the 1400KW of radiative cooling to how much convective coolig you could get from the same radiator on Earth.