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Design Of A Chip On Board (Cob) Led Based Industrial Luminaire With Thermal Simulations. L&E 27 (2) 2019

Light & Engineering 27 (2)

Volume 27
Date of publication 04/22/2019

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Design Of A Chip On Board (Cob) Led Based Industrial Luminaire With Thermal Simulations. L&E 27 (2) 2019
Articles authors:
Seher Ateş, Mustafa B. Yurtseven, Sermin Onaygil

Seher Ateş, graduated from Yildiz Technical University, Mechanical Engineering Department in 2009. She received M.Sc. degree from Istanbul Technical University in 2012. As of December 2010 she is a Research Assistant at Istanbul Technical University, Energy Institute, Energy Planning and Management Division and she is currently working on her Ph.D. Her research interests include thermal management of high power LEDs, thermal analyses of cooling systems, passive cooling methods and application of heat pipes in LED light systems.

Mustafa B. Yurtseven, graduated from Istanbul University, Mechanical Engineering Department in 2003. He got the MSc degree in 2006 and PhD degree in 2017 from Istanbul Technical University, Energy Institute. His research interests include photometric and radiometric measurements of LEDs, thermal management and statistical analyses

Sermin Onaygil, obtained her M.S. degree in February 1983 and her Ph.D. in December 1990 both from Istanbul Technical University (ITU). Energy planning and management, intelligent building systems, energy economy, general illumination techniques as well as road and tunnel lighting, lighting automation, energy efficient measures in lighting can be listed within her basic working areas. She is the founder member of Turkish National Committee on Illumination and currently she is the President of the Committee. She represents Turkey in Division 4 of International Commission on Illumination entitled Transportation and Exterior Applications and actively takes part in various kinds of studies within this division as Vice Director. Sermin Onaygil works as an academic at the Energy Institute in Istanbul Technical University and she is the chairman of Energy Planning and Management Division within this Institute and she also directs master and Ph.D. thesis in these study field

As the equipment is improving, the luminous efficacy of Chip on Board (COB) LEDs are increasing. In this study, the utilization of COB LEDs in an industrial high-bay luminaire, which can be considered as a relatively high power application, has been investigated starting from the initial design process. For an industrial hall, single-chip LED based reference luminaires, which can provide the required lighting quality criteria have been identified. COB LED selection and photometric measurements are done, and the number of COB LEDs to be used has been calculated by targeting the luminous flux value of reference luminaires. The COB LED based luminaire prototype with a plate finned heat sink was modelled by using a CAD software and the computer aided thermal simulations were performed. Then the prototype was manufactured and experimentally analysed. The highest difference between the experimental analysis and the thermal simulation was found to be less than 7 %, which demonstrates the consistency of design and analyses. This study is an example of the steps to be followed in the manufacturing stage of a COB LED based luminaire. Additionally, it is aimed to provide a perspective to the use of COB LEDs in high power applications.
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