Phase change material aided thermal scheming of high power LED: Effect of PCM with varying pitch of hexagonal fins

ABSTRACT

The current experimental investigation focused on the 16 W Light Emitting Diode (LED) with Phase Change Material (PCM)-filled heat sinks to augment consistency, high luminous flux and heat sink with low thermal resistance. Parameters such as input power, fin pitch value and quantity of fins were varied to study the heat transfer performance of the heat sink without and with PCM. Experimental results reveal that the hexagonal heat sink having a pitch of 10 mm performed well due to the increased melting rate of PCM as compared to other heat sinks. The thermal resistance of the H-10 heat sink with PCM was observed to be 3.3 °C/W, which is 73% lower than that of the H-10 heat sink without PCM at 16 W. The junction temperature enhancement ratio of 3.625 was observed for the H-10 heat sink with PCM at 16 W power input for SCT of 90 °C.

KEYWORDS:

• Heat sink
• hexagonal fins
• junction temperature
• thermal resistance
• phase change material
• luminous flux

Disclosure statement

The author affirms that they have no known contending financial benefits or personal associations that could have seemed to influence the work/data conveyed in this study.

Acknowledgments

The authors wish to thank CSIR–CLRI, Chennai, for providing the DSC testing facility. The authors also thank the Management and Department of Mechanical Engineering, Vel Tech Deemed to be University, Chennai for providing support in carrying out this study.

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Notes on contributors

Thangamani Ramesh

T. Ramesh is an Assistant Professor of the Mechanical Engineering Department, Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology, Chennai, India. He received his B.E in Mechanical Engineering and M. E in Engineering Design from S.K.P Engineering College, Triuvannamani, India. His research interest includes Heat transfer in Light emitting diode (LED), and metal based 3D printing.

Ayyappan Susila Praveen

Dr. Praveen A. S. is an Associate Professor of the Mechanical Engineering Department, Vel Tech Deemed to be University, Chennai, India. He received his B.Tech in Mechanical Engineering and M. Tech in Machine Design from University of Kerala, India. He gained his Ph.D. in Mechanical engineering in 2016 from Department of Mechanical Engineering, National Institute of Technology-Trichy, India for the title “Experimental investigation on erosion wear and oxidation behavior of Ni-based thermal spray coatings”. Dr. Praveen’s research interest includes Tribology, Thermal spray coatings and Additive manufacturing of ceramics. His research mainly focuses on the development of ceramic structures using direct ink writing (3D printing) technique for aeronautical, automotive, electronics and medical applications.

Praveen Bhaskaran Pillai

Dr. Praveen Bhaskaran Pillai is currently working as a Postdoctoral fellow in Department of Mechanical and Aeronautical Engineering at university of Pretoria, SA. He received his Ph.D from Nanotechnology Research Laboratory, Department of Mechanical Engineering, National Institute of Technology Tiruchirappalli, India in 2020. His Ph.D thesis was based on thermal performance of Micro-encapsulated Phase Change Material/GnP/LMA based heat sink for thermal management of electronics packaging. His primary area of research is on the scope of PCM for energy storage and thermal management applications, Vacuum Insulation Panel for energy efficient building and heat sink application. He currently focused on research in internal flow heat transfer with upstream and downstream constraints related to case studies in engineering and biological systems.

Sachin Salunkhe

Dr. Sachin Salunkhe is an Associate Professor in the Mechanical Engineering Department at Vel Tech University Chennai, India. He received his PhD from the S.V. National Institute of Technology, Surat, India. His main research interests are in the area of press tool design, AI applications in manufacturing, expert systems for die design, sheet metal forming, CAPP, and CAD/CAM. He has more than 65 research papers in reputed journals, conferences, and four book chapters to his credit. Dr. Sachin is editor of various international journals.