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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

DIRECT CONTACT MELTING HEAT TRANSFER ON A HEATED SURFACE

Get access (open in a dialog) DOI: 10.1615/IHTC8.1010
pages 1805-1810

Аннотация

Experimental and analytical investigations were performed on the direct contact melting phenomena, where a solid phase change material (PCM), pressed on a heat transfer surface with a temperature higher than the melting point, melted from the contacting boundary.
First, as a basic investigation, the steady state direct contact melting phenomena on a flat heat transfer surface was discussed. The liquid layer thickness distribution between the surface and the solid PCM besides the temperature- and velocity- distributions in the liquid layer were calculated numerically for various conditions. The relation among the nondimensional mean heat flux at the heat transfer surface, the Stefan number and the nondimensional contact pressure was analytically expressed as a formula, which was confirmed by experiments using ice and octadecane. Next, the formula was used approximately to analyze the quasi-steady state phenomena, where the contacting force varies with time due to the solid phase reduction by the phase change. The analytical results were also confirmed by experiments. Finally, the results were applied to estimate the characteristics of a latent heat thermal energy storage capsule.