Principle
The heat pipe uses the evaporative cooling effect, and the heat is quickly transferred due to the temperature difference between the two ends. The heat pipe is divided into two parts, the evaporation heating end and the condensation end. When the heated end begins to heat up, the liquid around the pipe wall will instantly vaporize to produce steam. At this time, the pressure of this part will increase, and the vapor flow will flow to the condensing end under the traction of the pressure. After the vapor stream reaches the condensation end, it condenses into a liquid, and at the same time releases a lot of heat, and finally returns to the evaporation heating end with the help of capillary force and gravity to complete a cycle.
A typical gravity heat pipe is shown in the below figure. The closed pipe is first evacuated and filled with a proper amount of working fluid in this state. The working fluid is heated at the lower end of the heat pipe. The working fluid absorbs heat and vaporizes into steam, and rises under a slight pressure difference. To the upper end of the heat pipe, and release heat to the outside, condensing into liquid. Under the action of gravity, the condensate returns to the heated section along the inner wall of the heat pipe, and is heated and vaporized again, so that the heat is continuously transferred from one end to the other end. Due to the phase change heat transfer, the thermal resistance in the heat pipe is very small.
The heat pipe has the advantage of extremely fast heat transfer speed. It can effectively reduce the thermal resistance value and increase the heat dissipation efficiency when installed in the radiator. It has extremely high thermal conductivity, which is hundreds of times the thermal conductivity of pure copper.
Gravity heat pipe radiator (module type device)
Technical performance
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1
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Natural convection cooling power
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200~2600W；
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2
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Fan auxiliary cooling power
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3600~20000W，Wind speed:3~8m/s
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3
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Applicable ambient temperature
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-10℃~40℃；
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4
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Temperature rise of radiator substrate
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35℃~45℃；
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5
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Geometric size
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The depth of the radiator is 200~500mm, and the plate width is determined according to the heat flux distribution and the actual conditions of the user;
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Gravity heat pipe radiator (two-stage device)
Technical performance
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1
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Natural convection cooling power
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100~600W；
|
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2
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Fan auxiliary cooling power
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1500~2000W，Wind speed:3~6m/s
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3
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Applicable ambient temperature
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-10℃~40℃；
|
|
4
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Temperature rise of radiator substrate
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35℃~45℃；
|
|
5
|
Geometric size
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Determined according to the heat flux distribution and the actual conditions of users;
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