Thermal performance of a heat sink (HS)-phase change material (PCM) assisted dual heat pipe (DHP) for LED cooling
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Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
PERGAMON-ELSEVIER SCIENCE LTD
Erişim Hakkı
Özet
This study evaluates the cooling of 30 W high-power light-emitting diodes (LEDs) using a configuration of LED-heat sink (HS), phase change material (PCM), and dual heat pipe (DHP). Furthermore, it aims to recover HS and DHP from abandoned computers, reduce the thermal resistance between the LED junction and the surrounding air, significantly enhance heat dissipation efficiency, and protect luminous flux. Results show that the average thermal resistance (Rth) values for natural convection and forced convection, measured by the PCM-HS-DHP, were 3.50 and 3.22 degrees C/W, respectively. LED's maximum junction temperature (Tj,max) is below 113.9 degrees C and 104.4 degrees C in natural convection and forced convection, respectively, which meets the requirement of the LED operating below 120 degrees C. The luminous flux in the forced convection was 3.19 % higher than that in the natural convection, attributed to a lower Tj,max of 8.34 % due to increased heat transfer. This means extending the LED's lifespan. The enhancement ratio (ER) and reduction ratio (RR) values of 2.54 and 5.54, respectively, showed promising outcomes. Reducing the power of the LED, increasing the air velocity, arranging the DHP to draw heat directly from the entire PCM pool or HS base, and increasing the PCM volume can provide better performance and lower Tj,max.
Açıklama
Anahtar Kelimeler
LED cooling, Heat sink, Phase change material, Heat pipe, Performance analysis
Kaynak
INT COMMUN HEAT MASS
WoS Q Değeri
Scopus Q Değeri
Cilt
167
