Whether the performance of the heat sink is excellent depends on two factors: pressure drop and heat transfer characteristics. The effect of porous foam metal on the heat transfer enhancement of the heat exchanger is very significant, but the pressure drop is also increased. In practical applications, comprehensive design should be considered and optimized. Foam metal for LED lamp cooling application prospects LED is an energy-efficient light source, and because of its small size, it is loved by designers. But they can only be called "small" only when they are not involved in thermal management. Although the operating temperature is much lower than that of incandescent lamps, with the rapid development of the LED industry, more and more high-power products are born, and a large amount of heat seriously affects the life of LED lighting systems, becoming LED as a new The biggest bottleneck in the development of a generation of environmentally friendly lighting. Conventional aluminum heatsinks rise with the LED temperature, there is no active cooling system, and eventually the LEDs burn out, but installing an active cooling system adds significant cost and makes the entire lighting system too bulky. Therefore, solving the problem of balance of cost, volume and heat dissipation effect, especially for high-power LED heat dissipation, has become a research hotspot of major manufacturers in the industry. The open-cell foam metal itself has a thermal conductivity much lower than that of a solid metal, even close to a heat-resistant material, but according to different requirements, the foam aperture (hole size) can be made from several tens of micrometers to several millimeters, and the material has a large Specific surface area and low density (the same material Lu Meng, etc.: foam metal LED light radiator research status technical engineering 2% ~ 10%) and other characteristics, and any metal material can be processed, metal foam can be burned to the pipeline On the inside and outside surfaces, the material shows great potential application value in thermal fluid engineering (new efficient compact heat exchangers). The LED cooling technology in foreign countries is relatively mature, and it is still in the preliminary research stage in China. In view of the problem of the volume of the led lamp, it is not appropriate to add a heat sink inside, and the external heat sink can better dissipate the heat. At present, aluminum radiator materials are generally used for heat dissipation. Foam metal has excellent heat dissipation performance, and its quality is relatively light. It is reasonable to believe that foam metal will have great application value in LED heat dissipation. Tr Span Air Layer Knitting Fabrics Air Knitting Fabric,Double Face Knit Fabric,Polyester Air Layer Fabric,Tr Span Air Layer Knitting Fabrics Shaoxing Yihui Textile Co.,ltd. , https://www.yihuitextile.com
The foreign LED cooling technology is relatively mature and still in the preliminary research stage in China.