Abstract
This paper deals with cold heat-release characteristics of the oil (tetradecane, C 14H 30, latent heat 229 kJ/kg, melting point 278.9 K)/water emulsion as a latent heat-storage material having a low melting point. An air-emulsion direct-contact heat exchange method was selected for the cold heat-release from the emulsion layer including solidified tetradecane. The temperature effectiveness, the sensible heat release time and the latent heat release time were measured as experimental parameters. The useful nondimensional correlation equations for those parameters were derived in terms of nondimensional emulsion layer depth, expressed the emulsion layer dimension, Reynolds number for air flow, Stefan number and heat capacity ratio.
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