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Melting Heat Transfer Characteristics of Plural Phase Change Microcapsules Slurry Having Different Diameters  

Kim, Myoung-Jun (College of Ocean Science & Technology, Kunsan National University)
Kim, Myoung-Hwan (College of Maritime Science, Korea Maritime University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.28, no.8, 2004 , pp. 1225-1238 More about this Journal
Abstract
The present study has been performed for obtaining the melting heat transfer enhancement characteristics of water mixture slurries of plural microcapsules having different diameters encapsulated with solid-liquid phase change material(PCM) flowing in a pipe heated under a constant wall heat flux condition. In the turbulent flow region, the friction factor of the present PCM slurry was to be lower than that of only water flow due to the drag reducing effect of the PCM slurry. The heat transfer coefficient of the PCM slurry flow in the pipe was increased by both effects of latent heat involved in phase change process and microconvection around plural microcapsules with different diameters. The experimental results revealed that the average heat transfer coefficient of the PCM slurry flow was about 2～2.8 times greater than that of a single phase of water.
Keywords
Melting Heat Transfer; Phase Change Material; Plural Microcapsules; Microconvection;
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