Effect of thermal conduction path deficiency on thermal properties of LEDs package

Abdelmlek, Khaoula Ben; Araoud, Zouhour; Ghnay, Rabie; Abderrazak, Kamel; Charrada, K.; Zissis, Georges

doi:10.1016/j.applthermaleng.2016.03.100

Cited by 46 publications

(11 citation statements)

References 16 publications

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“…A major problem with high power LED luminaires is the heat generated inside. The distribution of the LEDs and the effect of the number of LEDs lit affect the junction temperature and strongly participate in the degradation of the LED [ 43 ]. Most luminaires contain aluminum heatsinks as a solution.…”

Section: Discussionmentioning

confidence: 99%

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

Unión-Sánchez

Hermoso-Orzáez

Hervás-Pulido

et al. 2022

IJERPH

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Currently, LED technology is an established form of lighting in our cities and homes. Its lighting performance, durability, energy efficiency and light, together with the economic savings that its use implies, are displacing other classic forms of lighting. However, some problems associated with the durability of the equipment related to the problems of thermal dissipation and high temperature have begun to be detected, which end up affecting their luminous intensity and the useful life. There are many studies that show a direct relationship between the low quality of LED lighting and the aging of the equipment or its overheating, observing the depreciation of the intensity of the light and the visual chromaticity performance that can affect the health of users by altering circadian rhythms. On the other hand, the shortened useful life of the luminaires due to thermal stress has a direct impact on the LCA (Life Cycle Analysis) and its environmental impact, which indirectly affects human health. The purpose of this article is to compare the results previously obtained, at different contour temperatures, by theoretical thermal simulation of the 3D model of LED street lighting luminaires through the ANSYS Fluent simulation software. Contrasting these results with the practical results obtained with a thermal imaging camera, the study shows how the phenomenon of thermal dissipation plays a fundamental role in the lighting performance of LED technology. The parameter studied in this work is junction temperature (Tj), and how it can be used to predict the luminous properties in the design phase of luminaires in order to increase their useful life.

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Section: Discussionmentioning

confidence: 99%

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

Unión-Sánchez

Hermoso-Orzáez

Hervás-Pulido

et al. 2022

IJERPH

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show abstract

“…A major problem with high power LED luminaires is the heat generated inside. The distribution of the LEDs and the effect of the number of LEDs lit affect the junction temperature and strongly participate in the degradation of the LED [26]. Most luminaires contain aluminum heatsinks as a solution.…”

Section: Discussionmentioning

confidence: 99%

The Thermal Dissipation of LED Outdoor Lighting Luminaires: Comparative Analysis for a Real Case of Study

Jesús¹,

Jesús²,

Unión-Sánchez³

et al. 2020

Energy Efficiency and Sustainable Lighting - A Bet for the Future

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Today LED technology is being imposed, day by day, in our cities and homes as an efficient way of lighting. The performance of its lighting, durability, energy efficiency, and light, coupled with the economy of its use, is shifting to other classic forms of lighting. However, some problems associated with the durability of equipment associated with thermal dissipation and high-temperature problems, which end up affecting the light intensity and service life, are beginning to be detected. The objective of this paper is to compare the results obtained previously, at different contour temperatures, with the current practical results obtained with a FLUKETI25 thermal imaging camera. The theoretical results will be compared with the current results applied to the different luminaires. Where real thermal dissipation is studied, it is obtained for each of them in the laboratory of illumination with the thermographic camera FLUKE TI. The theoretical and experimental results are evaluated, and the results are discussed. This study shows that instead of LED technology, it is less risky for quality depreciation and durability of lighting if a project has already been achieved that favors optimal thermal dissipation, supported by the importance of choosing an appropriate design and appropriate materials.

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“…Tsai et al [14] analyzed the influence of natural and forced convective conditions on thermal resistance. Similarly, Abdelmlek et al [15], [16] studied the influence of LED quantity and distribution on junction temperature.…”

Section: Introductionmentioning

confidence: 99%

General Analytical Method for Heat Dissipation of N-Layer High-Power LED Systems

Meng

Kong

2021

IEEE Access

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Although the light-emitting diode (LED) has been developed into relative maturity, thermal management remains a very important problem for high-power LED systems. To obtain the temperature distribution and improve the heat dissipation of high-power LED systems, an N-layer model and the analytical solutions to temperature field and thermal resistance are proposed. The equivalent method of fins heatsink is included in modeling. The final analytical solutions are generalized to Nth to adapt flexibly to different system packaging. In particular, the analytical method has obvious advantages in dealing with the thin layer parameter analysis, and it is proved to be accurate and time-saving in comparison with the finite element simulation. The effects of the printed circuit board (PCB) composition and the heatsink on heat dissipation are analyzed in detail, and the related thermo-mechanisms are revealed in terms of thermal resistance. This work can be helpful for the pre-design of high-power LED systems.INDEX TERMS analytical method, heat dissipation, high power-LED system, N-layer model, temperature field, thermal resistance.

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Effect of thermal conduction path deficiency on thermal properties of LEDs package

Cited by 46 publications

References 16 publications

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

Impact of Thermal Dissipation on the Lighting Performance and Useful Life of LED Luminaires Applied to Urban Lighting: A Case Study

The Thermal Dissipation of LED Outdoor Lighting Luminaires: Comparative Analysis for a Real Case of Study

General Analytical Method for Heat Dissipation of N-Layer High-Power LED Systems

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