Numerical simulations of latent heat thermal energy storage utilizing double inclined fin

• Main Authors: Saldi, Zaki S., Prabowo, Bayu, Buana, Indra, Diguna, Lina J.
• Format: Conference Proceeding
• Language: English
• Subjects: Computational fluid dynamics; Computer simulation; Energy storage; Enthalpy; Heat transfer; Latent heat; Liquid phases; Mathematical models; Melting; Phase change materials; Porosity; Thermal energy
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0013597

In this study, melting characteristics of a Latent Heat Thermal Energy Storage (LHTES) system with Phase Change Material (PCM) utilizing double inclined fin was numerically investigated in order to guide the design of such systems for energy storage. This configuration was compared with other fin designs with varying inclination in terms of phase change front movement, flow patterns, time history of liquid fraction, and heat transfer enhancement relative to the finless design. The study was based on Computational Fluid Dynamics (CFD) simulations of conductive and convective heat transfers during the melting (energy storing) stage, with solid-liquid phase change sub-model based on enthalpy-porosity approach. Conjugate heat transfer approach, resolving solid tube and fin thickness, was also employed. The negatively inclined double fin of -20° was found to have the maximum heat transfer rate and minimum melting time, followed very closely by the oppositely inclined double fin of 20° and -20°. These models can therefore be considered favorable from the viewpoint of energy storing.