Light & Engineering 28 (5)

Volume 28
Date of publication 10/16/2020
Pages 106–115

Research Into The Junction Temperature And Power Of New Led Modules Generation In Dependence On Variable Parameters Light & Engineering Vol. 28, No. 5

Articles authors:

Kemal Furkan Sokmen, Osman Bedrettin Karatas

Kemal Furkan Sokmen is an assistant professor at the Department of Mechanical Engineering, Faculty of Engineering and Natural Science, Bursa Technical University, Bursa, Turkey. He received his Ph.D. in Mechanical Engineering from Bursa Uludag University. His research interests include heat transfer, computational fluid mechanics, electronic cooling, and thermal comfort

Osman Bedrettin Karatas is a research assistant at the Department of Mechanical Engineering, Faculty of Engineering and Natural Science, Bursa Technical University, Bursa, Turkey. He received his M.Sc. degree in Mechanical Engineering from Hitit University. His research interests include heat transfer, fluid mechanics and electronic cooling

Abstract:

In this research, the change in the junction temperature and luminous flux of a new generation LED module depending on variables such as radiation, lens piece, ambient temperatures, currents, and quantity of elements had been studied. Commercial software FloEFD2019 was used in the finite volume analysis made during the study. The analyses were verified by experiments. On basis of the analysis, a solution was obtained that does not depend on the number of elements. The force of gravity was taken into account. While the ambient temperatures were taken as Ta = 23 °C and 40 °C, and the radiation value as 1009 W/m2, currents as 140 mA, 160 mA, 180 mA, 200 mA, 220 mA and 240 mA, meanwhile, samples numbers on PCB were taken as 101 and 202. In order to determine the effect of the lens piece located on the LED module, the analysis was repeated with and without using the lens. As a result of the study, it was found that the increase in ambient temperature and radiation has an adverse effect on the temperature Tj and luminous flux. It has been observed that changing samples number has a negligible effect on luminous flux and temperature Tj. It was found that the use of radiation and lenses are the most important factors affecting the luminous flux of the module.

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Keywords

DOI: https://doi.org/10.33383/2019-101

Article in RUS:
Svetotekhnika #3, 2020, pp. 63–70