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A heat pipe radiator consists of a sealed tube, a liquid-absorbing core, and a vapor passage. The absorbent core surrounds the wall of the sealed tube and is impregnated with a saturated liquid that is capable of volatilization. This liquid can be distilled water, or ammonia, methanol, or acetone, for example. Heat pipe radiators filled with liquids such as ammonia, methanol, acetone, etc. still have good heat dissipation capability at low temperatures.
When the heat pipe radiator is in operation, its evaporation section absorbs the heat generated by the heat source (power semiconductor device, etc.), so that the liquid in its liquid-absorbing core tube boils into vapor. With the heat of the vapor from the evaporation section of the heat pipe radiator to the cooling section to move, when the vapor heat transfer to the cooling section, the vapor condenses into liquid. The condensed liquid is returned to the evaporating section through the capillary action of the liquid-absorbing core on the wall of the pipe, and so on, repeating the above cyclic process of continuous heat dissipation.
Advantages:
①Fast thermal response, its ability to transfer heat is more than 1,000 times greater than that of copper tubes of the same size and weight.
② Small size and light weight
③ high thermal efficiency, can simplify the thermal design of electronic equipment, such as air-cooled to self-cooling