A Study on Active-Cooling Control Technology of High-power LED Lighting Luminaries
Date Issued
2009
Date
2009
Author(s)
Lo, Yi-Hsuan
Abstract
The main objective of this study is to develop LED with active-cooling technique, designing an interior droplight, which can provide high power LED for the purpose of heat dissipation in high temperature environment (e.g. mines, factories and desert areas). This study uses DC 12V compressor as active-cooling component, with the interior droplight design, integrating the condenser, expansion valve, and evaporator into a system. The aim of applying this system is to dissipate the heat from the 150W LED into the environment. In addition, the temperature measured by the aluminum PCB is then processed for feedback control. The inverter technology is used to change the rotating speed of the compressor, to control the temperature of aluminum PCB, and to save power while the compressor is in operation. The LED aluminum PCB is controlled at around 50oC under ambient temperature 25℃, and the average power consumption of the compressor is 26W.The COP is 5.77, and the overall LED efficacy is about 85.2 lm/W. At 40℃, the average power consumption of the compressor is 48W.The COP is 3.13, and the overall LED efficacy will be reduced to about 77 lm/W.
Subjects
active-cooling
high temperature
Type
thesis
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