Effect of fins on the heating rate of a phase change material in a structure Academic Article uri icon

abstract

  • For heating a structure in winter in a multi-storey building a phase-change material (PCM) layer is used under the floor tiles. The inside space at each level has walls exposed to the ambient, and those are cooled from outside. In winter the PCM layer is heated at night, up to its total melting. In daytime it transfers its heat to the air in the structure and solidifies. The current numerical study focuses on the effect of longitudinal fins immersed in the container of the PCM on the process of solidification of PCM in daytime. The simulations are performed using Fluent 6.3 software, applying the enthalpyporosity approach to the phase-change of the material [1], where the porosity in each cell is set equal to the liquid fraction in that cell. The numerical model relates to the daytime temperature variation inside the structure, and transient conduction across the floor from the PCM layer. The chosen PCM is a …

publication date

  • October 17, 2012