Abstract
The physical properties of the test fine capsulated latent heat-storage material-water mixture were described in the first report. This paper deals with flow and cold heat-storage characteristics of the fine capsulated latent heat-storage material-water mixture as a latent heat-storage material having a low melting point of the core material (pentadecane, C15H32, freezing point 283.1 K). A coiled double-tube heat exchanger was used for the cold heat-storage experiment. The pressure drop, the heat-transfer coefficient and the finishing time of cold heat-storage in the coiled tube were measured as experimental parameters. It was clarified that the flow behavior of the fine capsulated latent heat-storage material-water mixture as a non-Newtonian fluid played an important role in cold heat-storage. The nondimensional correlation equations for the additional pressure loss coefficient, the heat-transfer coefficient and the finishing time of the cold heat-storage were derived in terms of Dean number and heat capacity ratio.
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