Enhancement of Heat Dissipation by Laser Micro Structuring for LED Module

Lu, Lihua; Zhang, Zhen

doi:10.3390/polym10080886

Cited by 13 publications

(5 citation statements)

References 38 publications

(41 reference statements)

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“…Later, this work is complemented with a validation analysis of the methodology with the practical results realized with a thermographic camera. We analyzed the actual results of the thermal dissipation of the luminaire with respect to the boundary conditions in the lighting laboratory [ 31 ], trying to assess and contrast the theoretical results, expected a priori in the design phase, with the real and practical results obtained [ 32 ]. We will try to justify that an adequate design and the choice of materials are key elements that allow a better heat dissipation in LED luminaires, improving their stability and lighting performance [ 33 ].…”

Section: Methodsmentioning

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: Methodsmentioning

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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“…Cabe mencionar los trabajos de Ventola et al (2014) y Lu et al (2018), quienes evaluaron la disipación de calor y el rendimiento térmico en disipadores de calor con superficies microtexturizados fabricadas por grabado con láser. En estos análisis, al realizar cambio geométricos complejos sobre las superficies, se nota una mejora significativa en la disipación de calor al ambiente, con lo que se logra disminuir la temperatura del cuerpo sólido sin aumentar su tamaño, ideal para la refrigeración de dispositivos eléctricos y electrónicos que tienden a reducir su área y tamaño.…”

Section: Superficies Biotexturizadas En El Diseño De Disipadores De C...unclassified

Análisis y diseño de sistemas térmicos. Aplicaciones en disipadores de calor y gasificadores de biomasa

Villalba¹,

Delgado-Mejía²,

Montoya³

et al. 2023

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En este libro, podrás encontrar metodologías para el diseño y análisis de sistemas térmicos, especialmente para gasificadores y disipadores de calor. Metodologías que van de la mano de herramientas computacionales y de nuevas estrategias que permiten optimizar estos sistemas. En los primeros dos capítulos se presentan dos métodos para mejorar el desempeño térmico de disipadores de calor; jugando con la modificación del área superficial, en los que, además, se realiza un análisis térmico, mediante software de fuente abierta y comercial con el objetivo de mostrar las bondades de cada uno. En el tercer capítulo se plantea un estudio detallado para el diseño y análisis de gasificadores de cascarilla de arroz de lecho fijo, en el que se definen algunas consideraciones derivadas de la experiencia acumulada por el equipo de investigadores de la Institución Universitaria Pascual Bravo, donde se dan a conocer aquellos parámetros característicos del proceso.

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“…Polymer substrates can be developed with various functionalities, such as self-cleaning, heat dissipation, anti-reflection, light extraction, and gas diffusion barrier (GDB) properties, through surface treatment and thin-film processes. [26][27][28][29][30][31][32][33] In particular, the plasma technology has been effectively used to impart various functionalities to polymer substrates. However, the prevailing plasma treatment of polymer surfaces involves a low-speed and high-temperature process that causes thermal damage to the polymer, making it difficult to commercialize the treated surfaces.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Reliable Organic Light–Emitting Diodes Enabled by a Multifunctional Hazy Substrate for Extreme Environments

Jeon,

Lee,

Nam

et al. 2023

Adv Funct Materials

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As transparent, flexible, and wearable organic electronics degrade under normal outdoor environmental conditions (e.g., water vapor, oxygen, and UV light) and extreme environments, including washing or rain, a customized encapsulation technology is required to improve device reliability. Herein, a simple process is presented for fabricating multifunctional hazy substrates (MFHSs) with excellent gas diffusion barrier (GDB), flexibility, UV reflectance, light scattering, and waterproof properties. First, a spiky polyethylene terephthalate (PET) surface is produced with 76.0% optical haze through ion‐beam treatment followed by the formation of a hydrophobic layer to achieve a waterproof effect (contact angle: 153.3°). Then, a multifunctional multibarrier film is fabricated based on a nano‐laminated distributed Bragg reflector and functional polymer on the functional PET substrate to serve as a GDB and UV filter. This multibarrier film has excellent mechanical and chemical stabilities, in addition to having a water vapor transmission rate of 10−6 g m−2 day−1 and UV transmittance of <3%. The so‐fabricated MFHS not only increases the device efficiency by 73% but also enables a highly flexible and environmentally stable organic light–emitting diode. The surface treatment and encapsulation technologies developed in this study are expected to increase the lifetime of organic devices and facilitate high outdoor usability.

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Enhancement of Heat Dissipation by Laser Micro Structuring for LED Module

Cited by 13 publications

References 38 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

Análisis y diseño de sistemas térmicos. Aplicaciones en disipadores de calor y gasificadores de biomasa

Highly Efficient and Reliable Organic Light–Emitting Diodes Enabled by a Multifunctional Hazy Substrate for Extreme Environments

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