에너지 발전형 LED 모듈의 열전달 경로 해석과 Heat sink 설계 최적화

Abstract

Variation of thermal resistivity depending on temperature difference and measurement of thermal resistivity of thermoelectric device in LED lighting engine module were studied. Generated power from waste heat and photometric characteristics of LED engine module were measured. From the measured and analysed data, we can concluded as follows. Control of temperature difference at the low temperature pare than at high temperature part was advantageous for LED module. The sum of the measured thermal resistance of LED module and thermoelectric device was 2.654 K/W and the measured total thermal resistance was 2.41 K/W. As a result of thermal simulation, minimum LED p-n junction temperature was 69.3 ℃ when the pin number is 23 pieces and 1mm of thickness. When 700 mA was applied to the LED engine module, 0.086 W of maximum power was obtained with 0.15 A of load. Light efficiency of LED module with thermoelectric device was 126.9 lm/W and it was confirmed 3.7 lm/W of efficiency decreement.