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Life of Pulsating Heat Pipe

Time：

2025-01-31

source:

Pulsating Heat Pipe is a new type of high-efficiency heat transfer element, and its life is affected by many factors.

From the perspective of internal working fluid, the stability of working fluid is of great significance to the life of Pulsating Heat Pipe. If the working fluid decomposes, deteriorates or reacts chemically with the pipe wall material during long-term operation, it will affect the normal operation of the vapor-liquid two-phase flow inside the heat pipe. For example, some working fluids may be chemically unstable in high temperature environments, which will gradually corrode the inner wall of the heat pipe, causing holes or increased roughness on the pipe wall, thereby interfering with the normal pulsating flow formation and reducing the service life of the Pulsating Heat Pipe.

Pulsating Heat Pipe

The material properties of the heat pipe also largely determine its life. The pipe wall material needs to have good thermal conductivity, corrosion resistance and mechanical strength. Good thermal conductivity ensures that heat can be transferred quickly, while corrosion resistance can resist the erosion that may be caused by the working fluid and the possible corrosion effects of the external environment. If the mechanical strength of the pipe wall material is insufficient, deformation, rupture, etc. may occur when it is subjected to internal pressure fluctuations and temperature changes for a long time. For example, in some high-frequency pulsation processes, the pipe wall is subjected to greater stress. If the material strength is not enough, it is easy to be damaged, thereby ending the service life of the Pulsating Heat Pipe.

Operating conditions are also a key factor affecting the life. If the Pulsating Heat Pipe is operated at too high or too low a temperature, its performance will be degraded faster. Too high a heat load may cause the working fluid to boil violently, resulting in excessive pressure impacting the pipe wall; while too low a temperature may deteriorate the fluidity of the working fluid and make it impossible to maintain a normal pulsating cycle. In addition, frequent starts and stops will also have an adverse effect on the Pulsating Heat Pipe. The temperature and pressure changes during each start and stop will bring a certain impact to the heat pipe, which will damage its structural integrity over a long period of time.

To extend the life of the Pulsating Heat Pipe, it is necessary to carefully select the appropriate working fluid and pipe wall material, and strictly control its operating conditions to ensure that it works in a stable and suitable environment.

Key words：

heat pipe

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