Presentation Title

Simultaneous Use of Different Passive Cooling Techniques for High Power LED Panels

Faculty Mentor

Sohail Zaidi

Start Date

18-11-2017 10:00 AM

End Date

18-11-2017 11:00 AM

Location

BSC-Ursa Minor 80

Session

Poster 1

Type of Presentation

Poster

Subject Area

engineering_computer_science

Abstract

Accelerated growth of plants on UV illumination finds immediate applications in aerospace and agriculture industries. High-power UV-LEDs are used but their performance depends on temperature. Active cooling techniques (fans/water) must be avoided (complexity/running cost). The impact of humidity and environmental temperature also needs attention. In this work, we explore new methods of using simultaneous passive cooling techniques (heat sink and embedded heat pipes). Two LED panels (LEDLinx AB0051 and LD3009) were investigated. Heat sinks for these panels were designed and optimized using Ansys and R-Tools GEN II modeling. Heat sinks accommodate thermocouples and heat pipes right below the LED panel. Experiments were performed in Hastest Solutions test chambers (Model HPCH-252XSUH). Keysight’s data recorder (model 34970A) was employed. Ocean optics spectrometer (Model USB2000+) was used to obtain the spectral transmission for the LEDs used in each panel. Test chamber temperature and humidity levels were varied (40% to 80%) to see their impact on the heat transfer process. With the proposed passive cooling technique, a 70% reduction in temperature is observed. Environmental temperature and humidity variation study indicated that the achievable minimum temperature was limited by the surrounding temperature. Whereas, effects of surrounding humidity level were found marginal. This presentation includes detailed experimental and theoretical results. Current work is being followed by a 200-Watt LED panel that is being cooled by two heavy duty fans. It is anticipated that the cooling techniques used in this work will virtually eliminate the active fans and will rely on the combination passive cooling techniques.

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Nov 18th, 10:00 AM Nov 18th, 11:00 AM

Simultaneous Use of Different Passive Cooling Techniques for High Power LED Panels

BSC-Ursa Minor 80

Accelerated growth of plants on UV illumination finds immediate applications in aerospace and agriculture industries. High-power UV-LEDs are used but their performance depends on temperature. Active cooling techniques (fans/water) must be avoided (complexity/running cost). The impact of humidity and environmental temperature also needs attention. In this work, we explore new methods of using simultaneous passive cooling techniques (heat sink and embedded heat pipes). Two LED panels (LEDLinx AB0051 and LD3009) were investigated. Heat sinks for these panels were designed and optimized using Ansys and R-Tools GEN II modeling. Heat sinks accommodate thermocouples and heat pipes right below the LED panel. Experiments were performed in Hastest Solutions test chambers (Model HPCH-252XSUH). Keysight’s data recorder (model 34970A) was employed. Ocean optics spectrometer (Model USB2000+) was used to obtain the spectral transmission for the LEDs used in each panel. Test chamber temperature and humidity levels were varied (40% to 80%) to see their impact on the heat transfer process. With the proposed passive cooling technique, a 70% reduction in temperature is observed. Environmental temperature and humidity variation study indicated that the achievable minimum temperature was limited by the surrounding temperature. Whereas, effects of surrounding humidity level were found marginal. This presentation includes detailed experimental and theoretical results. Current work is being followed by a 200-Watt LED panel that is being cooled by two heavy duty fans. It is anticipated that the cooling techniques used in this work will virtually eliminate the active fans and will rely on the combination passive cooling techniques.