Tube-belt copper car radiator car radiators are mostly copper and aluminum. Copper is a metal material with the best thermal conductivity and has excellent formability, brazing and corrosion resistance. It has been used for a long time. The most important material for automobile radiators, but copper resource issues and price issues have always been the main reasons for the application of copper radiators. Aluminum has been widely used in automobile radiators in recent years due to its advantages of light weight, low cost, and abundant resources. However, due to its complex process and poor corrosion resistance, it is only used in cars and other small engines. Automobile radiator cores have different structural types. At present, they are mainly tube-type, tube-belt, cell-type, and cell-type. Tube-core type, the experiment used is a tube-belt copper car radiator.

Oscillating flow heat pipes There are two basic structure types of oscillating flow heat pipes for automobile radiators: closed loop structure and open loop structure. Small pipe diameter and repeated bending of the hot and cold ends are the two basic conditions for forming an oscillating flow heat pipe. The oscillating flow heat pipe also has the following basic characteristics: no wick is needed; there can be multiple heating and cooling sections, and the adiabatic section is optional; no additional power is required, self-excited oscillation; surface tension is dominant, but gravity also affects Heat transfer performance; the self-oscillating working fluid transfers both latent heat and sensible heat at the same time. The oscillating flow heat pipe radiator adopts a copper tube with an outer diameter of 4mm and a wall thickness of 0.5mm, with an open loop structure. In order to prevent impurities or dirt from releasing non-condensable gas to damage the vacuum in the tube and hinder capillary action, the pipeline is cleaned in advance, degreasing and descaling, and then manually bent with a special elbow mold, and a vacuum pump is used to pre-pump the pipeline. Low vacuum, and then use diffusion pump to pump high vacuum, flush into the medium ethanol. The heating section of the heat pipe is placed in the water tank, and the heat dissipation section is outside the water tank. The heat pipe is brazed and welded to the partition plate, and the strength of the partition plate is strengthened by welding metal strips. In this way, the connection between the heat pipe and the water tank is not only well sealed, high temperature resistant, and high pressure bearing.

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