THERMAL SCIENCE

International Scientific Journal

Dhanushkodi Ganesan

,

Venkata Ramanan Madhavan

,

Velraj Ramalingam

THERMAL STUDIES ON HEAT SINKS EXPOSED TO SOLAR IRRADIATION

ABSTRACT
The effect of solar irradiation on the temperature of an electronic device attached to a heat sink is studied. Heat sinks with different surface treatments are considered for this study. The contribution of absorbed solar heat by the Al2O3 coated fin surface varies from 2.1% to 12.4% of the heat generated by the electronic devices and it reveals that the amount of solar heat absorbed by the black painted heat sink is almost equal to the heat generated by the electronics system. It is also found that the percentage of heat transfer by radiation varies from 6.2% to 11.0% for commercial finish heat sinks and is as high as 58.7% for a black painted heat sink. The combined effect of emissivity and solar absorptivity is studied to optimize the heat sink. For 10 mm fin height, the black painted heat sink illustrates better performance and for 20 mm and 30 mm fin height, the Al coated heat sink exhibits better performance. The temperature of the electronic device increases when the base area of the heat sink is increased beyond 700 cm2, which is the optimum base area. When the fin height is increased to 20 mm, the optimum base area for the black painted and Al2O3 coated heat sink is also increased to 780 cm2 and 850 cm2, respectively, thus reducing the device temperature further. The CFD results are validated with the temperature measurement conducted on the heat sink exposed to solar irradiation.
KEYWORDS
Thermal management of electronics, natural convection heat sink, outdoor application, solar heat absorption
PAPER SUBMITTED: 2023-01-10
PAPER REVISED: 2023-02-24
PAPER ACCEPTED: 2023-03-07
PUBLISHED ONLINE: 2023-04-22
DOI REFERENCE: https://doi.org/10.2298/TSCI230110081G
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 1, PAGES [1 - 12]
REFERENCES
  1. Agam, S., The 5G Unleashes the Future, ASME Mechanical Engineering, 141 (2019), 02, pp. 34-39
  2. Chen, Z., et al., Design and Simulation of the Thermal Management System for 5G Mobile Phones, in: Advances in Heat Transfer and Thermal Engineering, Springer, Singapore, Singapore, 2021
  3. Shang, Y., et al., The Design and Thermal Reliability Analysis of a High-Efficiency K-Band MMIC Me­dium-Power Amplifier with Multi harmonic Matching, in: Active and Passive Electronic Components, Hindawi Publishing Corporation, London, UK, Vol. 2016, p. 7
  4. Ellison, G. E., Maximum Thermal Spreading Resistance for Rectangular Sources and Plates with Non-Unity Aspect Ratios, IEEE Transactions on Components and Packaging Technologies, 26 (2003), 2, pp. 439-454
  5. Maguire, L., et al., Systematic Evaluation of Thermal Interface Materials - A Case Study in High Power Amplifier Design, Microelectronics Reliability, 45 (2005), 3-4, pp. 711-725
  6. Wang, X., et al., Effects of filler Distribution and Interface Thermal Resistance on the Thermal Conductivity of Composites Filling with Complex-Shaped Fillers, International Journal of Thermal Sciences, 160 (2021), 106678
  7. Kraus, A. D., et al., Extended Surface Heat Transfer, John Wiley and Sons Inc., New York, USA, 2001, Chapter 13, pp. 572-635
  8. Lee, S., Optimum Design and Selection of Heat Sinks, Proccedings, Eleventh IEEE SEMI-THERM Symposium, San Jose, Cal., USA, 1995, pp. 48-54
  9. Bar-Cohen, A., et al., Design of Optimum Plate-Fin Natural Convective Heat Sinks, Journal of Electronic Packaging June, 125 (2003), 2, pp. 208-216
  10. Liou, H. J., et al., Revisit on the Natural-Convection from Horizontal Multi-Channel Rectangular-Fin Heat Sinks, International Journal of Thermal Sciences, 171 (2022), 107232
  11. Rao, R. V., Venkateshan, S. P., Experimental Study of Free Convection and Radiation in Horizontal Fin Arrays, International Journal of Heat and Mass Transfer, 39 (1996), 4, pp. 779-789
  12. Rao, D. V., et al., Heat transfer from a Horizontal Fin Array by Natural-Convection and Radiation - A onjugate Analysis, International Journal of Heat and Mass Transfer, 49 (2006), 19-20, pp. 3379-3391
  13. Wang, F. F., Electronics Packaging Simplified Radiation Heat Transfer Analysis Method, Proceedings, Inter Society Conference on Thermal Phenomena, Las Vegas, Nev., USA, 2004, pp. 613-617
  14. Yu, S. H., et al., Effect of radiation in a Radial Heat Sink under Natural-Convection, International Journal of Heat and Mass Transfer, 55 (2012), 1-3, pp. 505-509
  15. Huang, L., et al., Cooling Strategy for LED Filament Bulb Utilizing Thermal Radiation Cooling and Open Slots Enhancing Thermal Convection, Proceedings, 16th IEEE ITHERM Conference, Orlando, Fla., USA, 2017, pp. 1030-1033
  16. Zhang, Z., et al., The Role of Anodization in Naturally Cooled Heat Sinks for Power Electronic Devices, ASME J. Heat Transfer, 142 (2020), 5, 052901
  17. Zu, H., et al., Analysis of enhanced Heat Transfer on A Passive Heat Sink with High-Emissivity Coating, International Journal of Thermal Sciences, 166 (2021), 106971
  18. Ganesan, D., Ramalingam, V., Effect of Solar Irradiation on Thermal Performance of Heat Sink - Numerical and Experimental Study, IEEE Transactions on Components, Packaging and Manufacturing Technology, 11 (2021), 9
  19. ***, IEEE Std C37.24™-2017, IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear, 2017
  20. Churchill, S. W., Chu, H. H. S., Correlating Equations for Laminar and Turbulent Free Convection from a Vertical Plate, International Journal of Heat and Mass Transfer, 18 (1975), 11, pp. 1323-1329
  21. Mubarak, R., et al., Improving the Irradiance Data Measured by Silicon-Based Sensors, Energies, 14 (2021), 2766
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Thermal studies on heat sinks exposed to solar irradiation

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence