Whether the LED lamp is stable, the quality is good or not, and the heat dissipation of the lamp body itself is important. At present, the heat dissipation of the high-brightness LED lamp on the market usually adopts natural heat dissipation, and the effect is not satisfactory. The heat dissipation is not ideal, and the life of the lamp itself will be affected.
The application of heat dissipating materials in the industry should not only focus on the heat dissipation coefficient, but ignore the thermal resistance value. If you only see a certain heat sink, heat sink, heat sink or thermal film with a good heat dissipation coefficient, you can think that you can conduct high heat out, which may be disappointing. It is expected that the temperature will drop, the LED epitaxial will not be light-degraded due to overheating, the life of the street lamp can be effectively extended, and the acceptance can be smoothly passed, which may not occur.
Etching the tin from the substrate line, coating the LED backlight ink, baking the upper protective film into the oven, leveling the whole board, attaching the thermal conductive film, and then bonding the heat dissipating module with adhesive or lock, in this cumbersome process It can be found that the material with the best thermal conductivity is also defeated by the thermal resistance. The air, the non-closed pores of the joint, the heat-dissipating gasket, the powder formed by the evaporation of the heat-dissipating oil, and the film thickness of the multi-layer thermal conductive film all form a thermal impedance. These multiple levels of thermal resistance can impede the rate of heat conduction, heat conduction is very slow, and even conduction to the surface of the luminaire, resulting in a cumulative increase in heat. The white backlight ink on the surface of the aluminum substrate should not only be reflective, but also can disperse the heat of the lower layer through the backlight of the surface.
Some manufacturers do not observe, replacing the LED-specific backlight ink with a general white text ink, which is equivalent to adding a layer of hard paint to seal the heat. After many failures, manufacturers have accepted new ideas and processes, focusing on the overall cooling program. The aluminum substrate is changed to the special heat-dissipating white backlight ink for LED. If the yellowish backlight ink is specified, the reflectivity will be increased to 91. The soft ceramic heat-dissipating paint is sprayed between the copper foil substrate and the aluminum substrate to reduce the Japanese The amount of the thermal conductive film used increases the breakdown voltage at a very low cost.
To protect the luminaire from the climatic environment, the heat is effectively conducted out, and the effective way to save money is to spray a soft ceramic heat-dissipating paint. Only from the perspective of the overall heat dissipation concept, reducing the thermal resistance interference is the key to the acceptance of LED large lamps. The lamp protection enclosure should be abandoning the traditional plating or baking finish. These two methods will seal the heat back into the fixture.
Why say closed cooling tower is energy saving and environmental protection equipment, more and more users are using this kind of equipment to replace the original equipment (open tower), we can through data analysis and comparison, the two energy data accounting can be obvious. Energy consumption is basically two major aspects, one is water, the other is electricity. Both are energy costs that no cooling tower can escape, unless you leave the equipment on.
First of all, look at the consumption of water. Water is generally consumed in two aspects. One is the flying overflow after spraying, and the other is the evaporation consumption of water.
Let's look at the open cooling tower, the spray water of the tower is basically between two and three percent of the overflow rate, if we according to the daily operation of 10 hours, excluding holidays, 280 days of operation. According to the actual open cooling tower flow of 6000 cubic meters per hour to calculate. 6000*2%*10*280= 336,000 tons of water, and the same closed cooling tower, its spray flying overflow is very small, because after all, the spray work is carried out in the tower, almost can be controlled in a few thousandths, we calculate according to 5 thousandths, the same is 10 hours of work, 280 days a year operation, To achieve the same cooling amplitude is basically 4,500 tons per hour of closed cooling tower is enough, then the calculation results: 4,500 *0.5%*10*280= 63,000 tons, it is not difficult to see, because of the different design structure caused by the waste of spraying water resources, more than 200,000 tons of terror. The bigger the pool of the open tower, the more wasted water, because the evaporation area increases, and the closed cooling tower has no pool, so the consumption here is zero. Judging from the price of a ton of water, just such a equipment, a year to solve the capital of hundreds of thousands of enterprises.
Let's look at the comparison of electric energy, electric energy is not different, because they are all through the same power equipment to operate the equipment, the power of the two is similar, the running time is the same, basically the energy consumption is about the same.
To sum up, for the closed cooling tower energy saving accounting can be strong to open the tower out, and, today are advocating energy conservation and environmental protection, this is the general trend, so the closed cooling tower is more and more favored by the majority of users.
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