An experimental study of a phase change storage system

Hawlader, Mohammad Nurul Alam and Smita, Panga (2011) An experimental study of a phase change storage system. In: Alternative energy. IIUM Press, Kuala Lumpur, pp. 23-29. ISBN 9789674181581

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Abstract

This paper describes the heat transfer process and the movement of the solid-liquid interface when the energy is added to a PCM, paraffin wax, through a vertical wall heated under conditions of uniform heat flux and constant temperature. Experiments indicate that the initial mode of heat transfer in the melting process was purely conduction controlled, and early convection due to volumetric expansion of the liquid PCM was followed by the solely buoyancy driven natural convection within the liquid. At this stage, the superheating of the liquid led to a combined convection and conduction mode of heat transfer until eventually conduction became the dominant mode of heat transfer. Superheating and subcooling of the PCM reduce the rate of propagation of the solid-liquid interface. Numerical simulation, based on the enthalpy formulation, indicated the presence of convection in the fluid region of the PCM, which is confirmed by the results from the experiments.

Item Type:	Book Chapter
Additional Information:	6548/20049
Uncontrolled Keywords:	Phase change materials, latent heat storage, heat transfer processes, melt profiles
Subjects:	T Technology > TH Building construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof Mohammad Nurul Alam / M N A Hawlader
Date Deposited:	31 May 2012 10:34
Last Modified:	31 May 2012 10:34
URI:	http://irep.iium.edu.my/id/eprint/20049

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