Experimental investigation of carbon nanotube coated heat sink for LED thermal management

Ramesh, T.; Praveen, Ayyappan Susila; Pillai, Praveen Bhaskaran

doi:10.1016/j.matpr.2022.08.370

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…The convective and total heat transfer coefficients of the cross-finned heat exchanger rose by 11% and 15%, respectively, as compared to the plate-fin heat sink. Recently, relatively few research (both experimental and numerical) on PCM-based heat sinks for high-power LED applications have been undertaken [13][14][15][16][17]. The PCM consists of three general thermal storage modes: sensible heat, latent heat, and thermochemical energy.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of In/Out Radial-Finned Heat Sink with PCM under Constant and Intermittent Power Mode in Power LEDs

Ramesh,

Praveen,

Pillai

et al. 2023

International Journal of Photoenergy

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The findings of the experimental study into optimizing the heat transfer rate of a PCM-based heat sink for high-power LEDs are presented in this work. The study investigated five heat sink types, with and without PCM. The LED case and junction temperatures, LED module temperatures, heat storage and release rate analyses, analyses of three types of cyclic operation modes, luminous flux, and heat sink thermal resistance were all examined independently. The results indicated that the PCM-based LED heat sink had improved thermal performance. The LED junction temperature of the PCM-equipped E-20 heat sink is nine degrees Celsius lower at 10 W than that of the heat sink without PCM. Furthermore, the E-20 heat sink with PCM extends the LED module’s critical lifespan. As a bonus, the E-20 with PCM had a 38.19 percent lower thermal resistance at 10 W than the E-20 without PCM. According to these results, the heat sink E-20 emits 715 lm at 10 W when operated without a phase-change material (PCM). With the same input power, the luminous flux of an E-20 equipped with a heat sink and a phase-change material (PCM) is 750 lm, a gain of 4.7%. Finally, clearly recommend the heat E-20 sink with PCM suitable for high-power LED thermal management system.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of In/Out Radial-Finned Heat Sink with PCM under Constant and Intermittent Power Mode in Power LEDs

Ramesh,

Praveen,

Pillai

et al. 2023

International Journal of Photoenergy

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“…A heat sink is considered one of the conventional approaches to address thermal issues in high-power LED lighting (Bobaru and Rachakonda, 2004;Bouknadel et al, 2014;Lee, 1995). For the improved thermal management, alternative methods such as jet impact cooling, phase-change cooling, and the use of nanofluids have been reported (Chen et al, 2022;Jiu et al, 2022;Lin et al, 2012;Moradikazerouni, 2022;Naphon et al, 2018;Ramos-Alvarado et al, 2013;Ramesh et al, 2022). While these methods offer enhanced the heat dissipation, they often require the use of a fan, complex and costly designs, and regular maintenance, leading to disadvantages such as extra additional energy consumption, bulkier systems, and significant noise levels (Lai et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Thermal management of multiple LEDs for high-power lighting applications

Cho,

JANG

2023

IJERR

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Power LED lighting has suffered from substantial heat generated, leading to significant performance degradation. Consequently, achieving an optimal distribution of LEDs is essential to ensure high luminance efficiency. Implementing effective thermal treatment is important to prevent any potential degradation in the performance of the LED lighting system. Optimizing the arrangement of individual LEDs is a promising approach to mitigating heat accumulation issues. In this paper, we propose a reasonable approach to obtaining the optimal distribution of LED lighting systems under DC biasing and PWM operating conditions. The thermal analysis simulation was performed based on the theoretical assumption to evaluate the thermal distribution of a single LED. Thermal analysis was conducted on an LED lighting system with 20 LEDs, and the distance between LEDs ranged from 4 mm to 24 mm. The simulated analysis showed that the maximum temperature could be controlled from 65.1 ℃ to 58.7 ℃. We discussed the optimum arrangement of LEDs and how heat generated by an LED influences the system. In addition, the LED lighting was operated in PWM mode to mitigate the thermal issues. The relationship between luminance efficiency and operation condition is discussed. Thus, the luminance efficiency improved from 114.8 lm/W to 126.8 lm/W, and the thermal relaxation time was no longer than 0.013 s. The process of determining the optimal distance between LEDs was very effective in achieving an optimized power operating condition and LEDs distribution in the module for a compact volume and enhanced performance.

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Experimental investigation of carbon nanotube coated heat sink for LED thermal management

Cited by 2 publications

References 15 publications

Experimental Study on the Effect of In/Out Radial-Finned Heat Sink with PCM under Constant and Intermittent Power Mode in Power LEDs

Experimental Study on the Effect of In/Out Radial-Finned Heat Sink with PCM under Constant and Intermittent Power Mode in Power LEDs

Thermal management of multiple LEDs for high-power lighting applications

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