IMPROVING LED EFFICIENCY THROUGH THERMOELECTRIC COOLERS: led efficiency
Forfatter
Semester
4. semester
Uddannelse
Udgivelsesår
2019
Afleveret
2019-06-07
Antal sider
47
Abstract
Recent developments in power Light Emitting Diode(LED) industry made LEDs suitable for being effi-ciently used in high intensity lighting fixtures. The ap-plied power can reach up to 60 W/mm2 in the highoutput LEDs, while 80% of this power dissipated asheat loss. The heat loss increases the LED temper-ature, so that its efficiency and lifetime reduce. Aneffective cooling can provide suitable temperature dis-tribution on the LED. Each LED needs specific designand cooling properties of the heat sink system. An in-teresting cooling technology that can be integrated withthe LEDs is thermoelectric cooler (TEC). Thermoelec-tric cooler is able to move the hot zone, due to the heatloss, in the LEDs to the heat sink. Therefore, the con-version efficiency of LEDs enhances at lower operationtemperature
Recent developments in power Light Emitting Diode(LED) industry made LEDs suitable for being effi-ciently used in high intensity lighting fixtures. The ap-plied power can reach up to 60 W/mm2 in the highoutput LEDs, while 80% of this power dissipated asheat loss. The heat loss increases the LED temper-ature, so that its efficiency and lifetime reduce. Aneffective cooling can provide suitable temperature dis-tribution on the LED. Each LED needs specific designand cooling properties of the heat sink system. An in-teresting cooling technology that can be integrated withthe LEDs is thermoelectric cooler (TEC). Thermoelec-tric cooler is able to move the hot zone, due to the heatloss, in the LEDs to the heat sink. Therefore, the con-version efficiency of LEDs enhances at lower operationtemperature