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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Thermal management of high-power LED based on thermoelectric cooler and nanofluid-cooled microchannel heat sink
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Thermal management of high-power LED based on thermoelectric cooler and nanofluid-cooled microchannel heat sink

机译：基于热电冷却器和纳米流体冷却微通道散热器的大功率LED热管理

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摘要

Effective thermal management for light-emitting diodes (LEDs) is critical, as temperature significantly affects their lifetime and performance. In this study, a system combining a thermoelectric cooler (TEC) and a microchannel heat sink (MHS) is investigated experimentally for thermal management of high-power LEDs. Nanofluids and water are used as coolant. The LED substrate temperature (T-s) is measured at various TEC powers, nanofluid concentrations, ambient temperatures of LED (T-a), and ambient temperatures of the fluid radiator (T-a,T-f). The effective thermal resistance (Rs-fa) of the LED substrate to the ambient of the fluid radiator is analyzed. Correlations of T-s and Rs-fa are obtained. Results show that the T-s is lowest when the TEC works at its rated power, and T-s is lower than T-a at T-a >= 55 degrees C. Using nanofluids instead of water as coolant reduces the T-s by up to 18.5 degrees C and decreases the thermal resistance by as much as 42.4%. The MHS heat transfer capacity is increased by 38.6%. The T-a,T-f exhibites greater influence on T-s compared to T-a. Results show that favorable performance of the thermal management of the high-power LED is obtained by the proposed nanofluid-cooled TEC-MHS system, particularly at high ambient temperature of LED.
机译：发光二极管（LED）的有效热管理至关重要，随着温度显着影响其寿命和性能。在该研究中，实验研究了将热电冷却器（TEC）和微通道散热器（MHS）的系统进行了实验研究了高功率LED的热管理。纳米流体和水用作冷却剂。 LED基板温度（T-S）以各种TEC，纳米流体浓度，LED（T-A）的环境温度测量，以及流体辐射器（T-A，T-F）的环境温度。分析LED基板的有效热阻（RS-FA）与流体辐射器的环境的环境。获得T-S和RS-FA的相关性。结果表明，当TEC以其额定功率工作时，TS是最低的，TS低于TA> = 55摄氏度。使用纳米流体代替水作为冷却剂将TS减少18.5摄氏度并降低热量并降低热量抗性高达42.4％。 MHS传热能力增加了38.6％。与T-A相比，T-A，T-F对T-S展示更大的影响。结果表明，通过所提出的纳米流体冷却的TEC-MHS系统获得高功率LED的热管理的有利性能，特别是在LED的高环境温度下获得。

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