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Un nouveau dispositif de refroidissement de caloduc automatisé pour LED haute puissance.

A novel automated heat-pipe cooling device for high-power LEDs.

Auteurs : XIAO C., LIAO H., WANG Y., et al.

Type d'article : Article

Résumé

In order to develop the thermal management of high-power LEDs, an automatic cooling device was firstly integrated with a microcontroller, heat pipes and fan. According to the experimental results, it was found that the substrate temperature of the high-power LEDs could be controlled automatically, and it could be kept in a relative low range to protect the LEDs, which contributes a better performance and longer lifetime of LED. A numerical model of the cooling system was established and its effectiveness was verified by experimental results. The simulation results show that the LED junction temperature can be maintained at a suitable range. Thus, the thermal resistances Rsa (from the heat sink to the ambient) and Rja (from the LED chip to the ambient) of the cooling system are 0.373°C/W and 5.953°C/W at 12 W, respectively. In addition, increasing the number of heat pipes & cooling fins is an effective method to improve heat transfer of the cooling system. The proposed cooling system, whose total power consumption is less than 1.58 W, is a very promising tool for the heat dissipation of high-power LEDs.

Détails

  • Titre original : A novel automated heat-pipe cooling device for high-power LEDs.
  • Identifiant de la fiche : 30020944
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 111
  • Date d'édition : 25/01/2017
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2016.10.041

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