Experimental investigation of nucleate pool boiling heat transfer characteristics on modified copper surface via laser-structured microstructures

Sugumaran, Luvindran and Mohd Zubir, Mohd Nashrul and Kazi, Salim Newaz and Tuan Zahari, Tuan Zaharinie and Mt Aznam, Suazlan and Mohd Halil, Aiman (2023) Experimental investigation of nucleate pool boiling heat transfer characteristics on modified copper surface via laser-structured microstructures. In: 6th International Conference on Clean Energy and Technology 2023, 7-8 June 2023, Bayview Hotel Penang, Malaysia. (Unpublished)

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Abstract

This study aims to evaluate the performance of boiling heat transfer on a structured surface subjected to constant heat flux. A nanosecond laser ablation was used to create different surface profiles on copper samples. Specifically, a series of step-like microstructured surfaces with varying secondary groove widths were fabricated to investigate their effect on nucleate pool boiling heat transfer performance of distilled water. The results indicated a significant enhancement in heat transfer performance for the laser structured surfaces compared to the smooth surface at low heat flux. This improvement was attributed to the increased nucleation frequency, surface area, and nucleation site density. However, at higher heat flux, the surface with a smaller secondary groove width (LS 2) exhibited a decline in heat transfer performance, which was likely due to larger bubble escaping resistance. In contrast, the surface with a larger secondary groove width (LS 1) demonstrated the best heat transfer performance. The current work would help in finding an optimum surface structuring design for gaining higher boiling heat transfer performance which benefits industries dealing with thermal management processes.

Item Type:	Conference or Workshop Item (Slide Presentation)
Additional Information:	8062/105008
Uncontrolled Keywords:	pool boiling, heat transfer enhancement, passive cooling.
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery > TJ163.26 Energy conservation
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Dr. Suazlan Mt Aznam
Date Deposited:	13 Jul 2023 10:20
Last Modified:	13 Jul 2023 10:20
URI:	http://irep.iium.edu.my/id/eprint/105008

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