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As a first step for studying the effect of porous metal plate-type-fin on the melting process of latent heat storage, fundamental experiments using paraffin wax with the melting point of some 40°C have been conducted. In this study, melting processes for three kinds of heat storage systems, namely the system without any fins, and the systems with horizontal fin arrays and a vertical fin, are investigated under the same heating conditions. From the experiments, the melting pattern and the transient temperature change for each system are clarified. Further, natural convection flow in the system during the melting process is visualized using the photochromic technique. The visualization of the temperature field near the vertical heat source wall is also performed using the shadowgraph technique. From those visualizations, the characteristics of the velocity and temperature fields near the heat source wall are clarified for each heat storage system.

Effect of Porous Metal Plate-Type-Fin on Melting of Paraffin and Visualization of Its Melting Process