LAPSE:2023.25683
Published Article
LAPSE:2023.25683
A Numerical and Experimental Study of a Novel Heat Sink Design for Natural Convection Cooling of LED Grow Lights
Ram Adhikari, Dawood Beyragh, Majid Pahlevani, David Wood
March 29, 2023
Light-emitting diode (LED) grow lights are increasingly used in large-scale indoor farming to provide controlled light intensity and spectrum to maximize photosynthesis at various growth stages of plants. As well as converting electricity into light, the LED chips generate heat, so the boards must be properly cooled to maintain the high efficiency and reliability of the LED chips. Currently, LED grow lights are cooled by forced convection air cooling, the fans of which are often the points of failure and also consumers of a significant amount of power. Natural convection cooling is promising as it does not require any moving parts, but one major design challenge is to improve its relatively low heat transfer rate. This paper presents a novel heat sink design for natural convection cooling of LED grow lights. The new design consists of a large rectangular fin array with openings in the base transverse to the fins to increase air flow, and hence the heat transfer. Numerical simulations and experimental testing of a prototype LED grow light with the new heat sink showed that openings achieved their intended purpose. It was found that the new heat sink can transfer the necessary heat flux within the safe operating temperature range of LED chips, which is adequate for cooling LED grow lights.
Keywords
heat transfer, LED grow light, natural convection cooling, rectangular fins with openings
Suggested Citation
Adhikari R, Beyragh D, Pahlevani M, Wood D. A Numerical and Experimental Study of a Novel Heat Sink Design for Natural Convection Cooling of LED Grow Lights. (2023). LAPSE:2023.25683
Author Affiliations
Adhikari R: Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
Beyragh D: Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
Pahlevani M: Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada
Wood D: Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada [ORCID]
Journal Name
Energies
Volume
13
Issue
16
Article Number
E4046
Year
2020
Publication Date
2020-08-05
Published Version
ISSN
1996-1073
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PII: en13164046, Publication Type: Journal Article
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LAPSE:2023.25683
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doi:10.3390/en13164046
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Mar 29, 2023
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