What is the working principle of radiation heat dissipation?

Radiant heat dissipation is the method of heat radiation that is emitted from the surface of a warm object and received by a cooler object. The heat dissipated through this route accounts for about 70% to 85% of the total heat dissipation.
Radiant heat dissipation is related to the temperature difference and the radiation area. When the ambient temperature is higher than the human body temperature, it cannot rely on radiation to dissipate heat. Convection cooling refers to the fact that the air that is closely attached to the heat source rises in temperature and expands in volume as a result of the radiation. The cold air is then replenished, and the surface of the heat source exchanges heat with the colder air that has been newly moved, thus continuously taking away heat.
After knowing this working principle, I believe that consumers also understand how to maintain this product.

Siphon principle principle of refrigeration

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