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Semlight LED high bay light Radiator Technical Introduction-Micro Grooves composite phase change


 
 Since 2006 Semlight Company began working on research and development of high-power LED high bay light, and has made a number of technologies innovation breakthroughs in the field of high power LED high baylight. Its mission is to develop a new generation of LED lighting products with more green, environmentally friendly, energy-saving features.
 
 Above 150w LED high bay light, Semlight adopts Micro Grooves composite phase change radiator. Working principle as follows: When one end of the radiator heat, its internal heat transfer medium filled (usually industrial water or acetone) will heat vaporized into vapor phase fluid, vapor phase fluid rapidly transfer heat to the heat sink through the internal micro-channel structure the other end or other parts. When the fluid reaches the vapor condensing end, will become condensate liquid form, releasing latent heat of vaporization, then the liquid fluid from the interior of the subtle groove group, returned to the heating side, so that through continuous media condensation and evaporation cycle, to achieve a micro grooves composite phase change heat sink fast, cooling function.
 Micro Grooves composite phase change of LED High Bay Light has following features:
 
 1. Super thermal capacity: Micro Grooves composite phase change LED high bay radiator has superconducting heat conduction; the heat capacity is 10,000 times than the aluminum plate. Such technology makes heat from LED transfer to the area large aluminum fins. LED chip operating temperature is below 90 ℃. Thermal conductivity of copper is about 400W / (m * ℃); Compare with copper, micro capillary groove composite phase change has superconducting heat capacity. With a long 50cm, diameter 1cm  solid copper heat energy transport 200W at 100 ℃ operating temperature, copper ends of the temperature difference of up to 70 ℃, but half of the length and weight, and the same work condition, micro-groove group phase change radiator reach the same effect, and the temperature drop of only 0.5 ℃, the experiment shows micro-groove group phase change technology has superconducting transition heat conduction.
 
 2. Super cooling capacity: Take hot flow density reached 400W / c ㎡, its ability 1000 times higher than the water-cooled, approximately 100 times higher than the heat pipe. Take the heat capacity 100 times than forced water cooling, 1000 times higher than the forced air cooling. Under a standard atmospheric pressure, the boiling point of water is 100 ℃, 1Kg water temperature from 99 ℃ to 100 ℃, require the thermal energy of 4200 joules; 1Kg 100 ℃ water absorbing heat becomes steam 100 ℃, the temperature does not change, but absorb 2260000 joules. Water cooling for the sensible heat exchange, low heat, MGCP technology is latent heat exchange, super heat capacity. That 1Kg water rise 1 ℃ only need 4200 Joule heat, 1Kg 100 ℃ water absorbing heat becomes steam 100 ℃, the temperature does not change, but absorb 2260000 joules. The absorbed heat is 500 times different; therefore, there is a huge difference between the heat transfer capacity.
 
 3. No-power consumption cooling: passive cooling without fans or pumps, no cooling energy, no power running, saving energy. Micro Grooves composite phase change technology make use of high-power electronic devices generate heat energy to take the heat medium kinetic and potential evaporation, steam flow to the condenser heat condensed into a liquid by means of heat taken micro-groove group capillary forces and liquid gravity back into the high-power electronic heat taken devices, in order to achieve closed cooling cycle without external power.
 
 4. Light weight, small size: the same power LED high bay light, micro capillary groove composite phase change weight radiator is 50% less than aluminum extrusion heat sink, and the volume is less than 60%.
 High reliability: stable LED High Bay Light, no startup problems, the reliability is much higher than the fan, water cooling and heat pipe radiator.
 The difference between Semlight Micro Grooves composite phase change radiator and heat pipe as below:
 1, the form is similar with that of heat pipe, but there are essential difference in the heat transfer mechanism, structure, and high bay light performance;
 2, using powerful micro-size composite phase change heat transfer enhancement principle; heat pipe is only ordinary film evaporation;
 3, no inherent boiling heat pipe, entrainment, capillary forces, and many other heat transfer limit;
 4, no such problems as that from heat pipe: high contact resistance and complex equipment;
 5, no heat pipe problem starts with work stability aspects;
 6, the same temperature per unit area, its heat removal capacity is about 100 times higher than that of the heat pipe, and the system of high bay light is simple and compact.
 Semlight LED high bay light due to use this advanced cooling technology, chip junction temperature is 15-20 ℃ lower than that of conventional aluminum radiator.  Thus, LED light decay is very small, greatly extending the life of   the LED light source. Hope you can get the best LED high bay light at http://www.semlight.com/LED-high-bay-lights.html.