Axial grooved heat pipe is generally called grooved heat pipe. It refers to the opening of an axial groove on the inner wall of the shell to provide a capillary pressure head and a liquid passage. The cross-section of the groove can be rectangular, trapezoidal, circular and variable cross-section grooves. Although the capillary pressure head is small, the liquid flow resistance of the groove core is very small, so it can achieve higher axial heat transfer capacity, smaller radial thermal resistance, good repeatability of the process, and accurate geometric parameters can be obtained. The capillary limit can be calculated correctly. The performance of this kind of tube is basically unchanged after bending, but because of its poor anti-gravity ability, it is not suitable for tilting (hot end up) operation. It is very suitable for zero gravity condition in space. Therefore, it is widely used in space vehicles and high-power devices without reverse heat transfer.

Specification of grooved heat pipe: Φ6mm
Φ6 mm grooved heat pipe length, due to technological factors, the shortest recommended is 100 mm, less than 70 mm grooved heat pipe, not recommended for use, the longest recommended length is 2000 mm, grooved heat pipe beyond this length can also be customized, but not in the recommended range, considering the power and heat transfer characteristics of grooved heat pipe, its ideal size range is: 100 mm to 1000 mm for the optimal size.

Dental mesh in grooved heat pipe specification:

The data are only used as reference for scientific research. In the actual production process, adjustments will be made according to the best heat transfer effect, whichever is the actual product.

Invalid end of grooved heat pipe:
In the production process of Φ6mm grooved heat pipe, there will be spinning seal and vacuum exhaust seal at both ends. The end of the retracted heat pipe can not become the effective heat transfer area as the outer diameter, so there will be the concept of invalid end. The invalid end size of 5mm heat pipe is: spinning seal invalid end 3-4mm, vacuum exhaust seal invalid end 6-7mm, minimum bending radius of heat pipe 9mm.

Bending and flattening of grooved heat pipes:
Users often need to flatten the heat pipe. In principle, bending and flattening operation is not recommended for grooved heat pipe. If there is special need to flatten the heat pipe, relevant data of sintered heat pipe products with parameters are recommended.
The figure above is a schematic diagram of heat pipe test, in which several data can be found in the following charts: diameter of heat pipe, total length of heat pipe, length of evaporation section, length of condensation section, and inclination angle.

Φ6mm grooved heat pipes are often used in practical applications. Users often hear about the need for some parameters of grooved heat pipes in the development and use of application products. Now some relevant data of grooved heat pipes produced by our company are provided to users and research institutions of universities for reference only.