Heat Transfer In Space. Radiation not to be confused with thermal radiation refers to the transfer of heat through empty space. Fluid loops to transfer the heat emitted by equipment to the radiators.
Only a small portion comes as visible light. That means that heat is not spread out through the medium it travels through as on earth. Single phase loops controlled by a pump.
On earth heat travels by conduction convection and radiation.
The common types include plate heat exchangers phes plate fi n heat exchangers tube fi n heat exchangers etc. If as a thought experiment we turned off the pumps and oriented the station so that the radiator was in the shadow of say a solar panel the ammonia would likely freeze after some period of time. In space conduction and convection are almost entirely nonexistent. Conduction is what scientists call the transfer of heat through touching.