NDLI: Heat Transfer Analysis of the High-Power LED Lamp With Liquid-Cooled Package

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jou, Rong-Yuan
Copyright Year	2010
Abstract	In this study, the technique of immersed LEDs in ambient fluids of air, silicone oil or FC-40, respectively, to cool the LEDs which will generate large amount of heat in operation is investigated by methodologies of experimental measurements and numerical simulations. In experiments, three powers are sequentially input to the LEDs and three fluids, air, silicone oil, and FC-40, respectively, are used to cool the LEDs immersed in these fluids. Temperatures are measured by TCs and IR thermal imager. Detailed temperature and flow fields inside the lamp enclosure are analyzed, and results are compared to experimental measurements. Inclinations of LED lamp in four orientations of 0, 90, 135, 180, respectively, are studied to explore the inclination effects to thermal design of LED lamp. Simulation results found that it is not significant to the LEDs temperature responses. Thermal resistances Rja of the liquid-cooled package of LED lamp are calculated from simulation results, and it is around 13.7 °C/W in this design. In illuminance measurements, measured illuminances show tendency of reciprocal to distance square and proportional to the luminous intensity which is similar to the illuminance principle, and its values are in the sequence of 5W>4W>3W for three kinds of fluids. Basically, illuminances for air, FC-40, and silicone oil fluids are in the sequence of air>FC-40>silicone oil.
Starting Page	175
Ending Page	186
Page Count	12
File Format	PDF
ISBN	9780791844281
DOI	10.1115/IMECE2010-37822
Volume Number	Volume 4: Electronics and Photonics
Conference Proceedings	ASME 2010 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2010-11-12
Publisher Place	Vancouver, British Columbia, Canada
Access Restriction	Subscribed
Subject Keyword	Convective heat transfer Liquid Led Thermal resistance Temperature Computer simulation Brightness (photometry) Light-emitting diodes Flow (dynamics) Convection Design Fluids Heat Simulation results Silicones Heat transfer
Content Type	Text
Resource Type	Article

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