Abstract

This paper deals with thermal properties of oil (tetradecane, C14H30, melting point of 278.9K) / water emulsion as a latent heat storage material having a low melting point. The measured results of the physical properties of the test emulsion, i.e., thermal conductivity, specific heat, latent heat and density, were discussed for the temperature region of solid and liquid phases of the dispersion material (tetradecane). It was clarified that Eucken's equation could be applied to the estimation of thermal conductivity of the emulsion. Moreover it was established that tetradecane as the dispersion material exhibited a supercooling phenomenon which influenced the thermal properties. Useful correlation equations of thermal properties for the emulsion were proposed in terms of temperature and concentration ratio of the emulsion constituents.

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