The development of materials used

Because copper has good heat transfer performance, strong corrosion resistance, with sufficient strength, good brazing performance, easy processing and good economy, the original radiator industry has been copper and copper alloy as the main radiator material. With the continuous development of industry, copper consumption is increasing. For the radiator industry, the material problem has become an urgent problem to be solved. The aluminum radiator with light weight, high thermal performance, low cost of raw materials, good reliability, since the mid-1980s, gradually replace the copper radiator, in the car is widely used. In the course of 20 years of development, the wall is becoming thinner, the overall device is more and more light, cooling efficiency requirements are gradually improved, so as to meet the low cost and efficient market requirements.0.

However, aluminum radiator also has its drawbacks exist, Feng Zonghui said that the current high temperature, corrosion resistance, high strength aluminum radiator performance has yet to be improved. Wang Zhongzhu Secretary-General believes that the current high temperature problems is not great, high pressure and high strength to be improved. Shanghai Bell'er Thermal System Co., Ltd. technical director Pan Yunxian pointed out that compared with copper, aluminum does have shortcomings, but we want to see the overall cost of a product, in general, the advantages of aluminum is far greater than the disadvantage.

At present, some new materials are also being developed. Auckland National Laboratory has developed a unique graphite foam material, the graphite foam density of 0.2 ~ 0.6g / cm3, thermal conductivity of 40 ~ 187W / m. K. And because the foam for the honeycomb-like mesh structure, contact surface area is large, can greatly improve the heat transfer coefficient. In addition, some engineering plastics are also gradually used in the radiator does not involve heat transfer components, common is to use enhanced nylon 66 (plus glass fiber nylon 66) injection processing into the radiator water chamber, radiator core and water Between the rooms without brazing, mechanical assembly. However, for the future whether there are other non-metallic materials such as polymer composites can be used for radiator cooling parts manufacturing is still unknown, but first of all, the material itself needs to have better thermal conductivity, the other from the structure also need relatively large Adjustment. At present, some information can be seen from abroad, the production of foam materials made of radiators, the use of nano-fluid as an internal heat transfer medium