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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

LATENT HEAT THERMAL ENERGY STORAGE BY USING BINARY MIXTURE

Get access (open in a dialog) DOI: 10.1615/IHTC8.950
pages 1767-1772

Abstract

Latent heat thermal energy storage is investigated by using a binary mixture of p−C6H4Cl2 and p−C6H4Br2 as a heat storage material. In solidification of a binary mixture, the melting temperature changes due to the variation of mixing ratio are caused by the segregation. Two solidification models are proposed for a theoretical analysis. In the first model, the solidification increases in the direction of the heat flow. In the other, it is assumed that the segregation grows perpendicularly to the heat flow, which corresponds to a dendritic solidification. The former model can be well applied in the low mixing ratio of p−C6H4Cl2 and the latter can be used in the high mixing ratio. The temperature profile also changes in accordance with the initial mixing ratio of the two materials, however, the variation of the transfered heat from outside with time is quite similar to that of pure material having the same melting temperature. The effect of free convection on heat storage performance is also investigated by changing the direction of the heat input or output.