Numerical investigation of the thermal performance of water based closed loop oscillating heat pipe (CLOHP)

Conference paper


Yeboah, S. and Darkwa, J. (2015). Numerical investigation of the thermal performance of water based closed loop oscillating heat pipe (CLOHP). 14th International Conference on Sustainable Energy Technologies. Nottingham, UK 25 - 27 Aug 2015 University of Nottingham & WSSET.
AuthorsYeboah, S. and Darkwa, J.
TypeConference paper
Abstract

The enhanced capabilities of Oscillating/Pulsating Heat Pipes (OHPs/PHPs) are often curtailed by a gamut of factors that affects their optimum thermal performance. These factors ranging from their design parameters to operating conditions may not make it feasible to develop experimental prototypes through trial and error as optimum thermal performance cannot be ascertained a priori. In this study, an Eulerian Volume of Fluid (VOF) model coupled with a Level Set Method has been used to numerically investigate the thermal performance of a five-turn water based CLOHP with volume fractions 0.3, 0.5 and 0.7 in vertical and horizontal modes. The capabilities of this computational fluid dynamics (CFD) approach to help predict the optimum thermal performance of OHP/PHPs is well established in literature. A summary of the results from this investigations show that more convective heat transfer rate occurs from the liquid phase than from the vapour phase. Also orientation was found to significantly influence pressure distribution within the CLOHPs. Finally it was observed that thermal resistance was significantly influenced by volume fraction/fill ratio rather than by orientation of the device.

KeywordsClosed Loop Oscillating Heat Pipe, Volume of Fluid (VOF), Computational Fluid Dynamics (CFD), Thermal Performance
Year2015
PublisherUniversity of Nottingham & WSSET
Accepted author manuscript
License
File Access Level
Open
Publication dates
Online07 Jul 2016
Publication process dates
Accepted30 Apr 2015
Deposited05 May 2022
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https://openresearch.lsbu.ac.uk/item/8z926

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