What Is Passive Cooling?

Active cooling system means that the cooling system consumes energy to cool, in contrast to passive cooling, which does not consume energy during cooling.

Common active cooling will make

Air-cooled , also known as air-cooled , is

Passive cooling, by

Some equipment will generate a large amount of heat during work, and this excess heat cannot be quickly dissipated and accumulated to generate high temperature, which may destroy the working equipment. At this time, the radiator can effectively solve this problem. The heat sink is a layer of good heat-conducting medium attached to the heating equipment. It plays the role of a middleman. Sometimes a fan and other things are added to the heat-conducting medium (heat-conducting paste) to accelerate the heat dissipation effect. But sometimes the radiator also plays the role of a robber. For example, the radiator of a refrigerator is forced to remove heat to reach a temperature lower than room temperature.

The working principle of the radiator is that heat is generated from the heating device and transferred to the radiator and then to the air and other materials, and the heat is transferred through the heat transfer in thermodynamics. The heat transfer methods mainly include heat conduction, heat convection, and heat radiation. For example, when there is a temperature difference between a substance and a substance, heat transfer occurs until the temperature is the same everywhere. The heat sink makes use of this. For example, if a good thermally conductive material is used, the thin and large fin-like structure increases the area and heat conduction speed of the contact between the heating device and the radiator to the air and other substances. ^[2]