2025, Vol. 12, No. 3. - go to content...

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DOI: 10.15862/13INOR325 (https://doi.org/10.15862/13INOR325)

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Chaschin Ye.A., Shilov I.V., Maslakova G.V. Increasing the lifespan of a direct-hung LED lamp. Russian journal of resources, conservation and recycling. 2025; 12(3). Available at: https://resources.today/PDF/13INOR325.pdf (in Russian). DOI: 10.15862/13INOR325

Increasing the lifespan of a direct-hung LED lamp

Chaschin Yevgeny Anatolievich
Kovrov State Technological Academy named after V.A. Degtyarev, Kovrov, Russia
E-mail: kanircha@list.ru
ORCID: https://orcid.org/0000-0002-4000-0035
RSCI: https://elibrary.ru/author_profile.asp?id=42261
SCOPUS: https://www.scopus.com/authid/detail.url?authorId=6506540880; https://www.scopus.com/authid/detail.url?authorId=6507486248

Shilov Igor Vyacheslavovich
Kovrov State Technological Academy named after V.A. Degtyarev, Kovrov, Russia
E-mail: shilov@dksta.ru
RSCI: https://elibrary.ru/author_profile.asp?id=42266

Maslakova Galina Vladimirovna
Lipetsk State Technical University, Lipetsk, Russia
E-mail: maslakova.gv@ya.ru
RSCI: https://elibrary.ru/author_profile.asp?id=667627

Abstract. In engineering practice, it is not uncommon for LED direct-mount lights with a power of more than 50 W to be used for lighting hangars and other industrial premises. The practice of using LED lights in such cases shows that the light output decreases over time due to the progressive degradation of LEDs caused by an increase in the temperature of the active area of the LED crystals, which is caused by a violation of the thermal regime. According to the basic principles of thermal management, the temperature of the active area is determined by the temperature at the point of contact between the PCB and the metal base on which the LED modules and the LED light housing are placed, which also serves as a heat sink. This makes it relevant to determine the heat-efficient shapes of enclosures that also function as heat sinks. In the article, on the example of an LED luminaire containing 3 LED modules of electrical/thermal power of 45/35 W each, the simulation of the thermal system for the housing with a length of 450 mm, made by extrusion of aluminum alloy AD31 GOST 4784-97, is performed. According to the results of modeling in the SolidWorks software package, taking into account the thermal resistance between the LED and the housing, the possibility of preserving the resource of operation of LED luminaires of direct suspension by topological optimization of the housing and spatial orientation is considered. It has been shown that the ability to select heat-efficient radiator shapes without significantly complicating the topology of their surfaces by increasing the role of the thermal conductivity mechanism allows for a 20 % increase in the service life of an LED lamp. t has also been shown that changing the spatial orientation of a direct-suspension LED lamp allows it to be operated at ambient temperatures up to 400C while maintaining its service life.

Keywords: energy saving; LED lamp; thermal management; topology; thermal conductivity; resource; extrusion

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