Numerical modeling for solid–liquid phase change phenomena in porous media: Shell-and-tube type latent heat thermal energy storage

• Published in: Applied energy Vol. 112; pp. 1222 - 1232
• Main Authors: Liu, Zhenyu, Yao, Yuanpeng, Wu, Huiying
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2013
• Subjects: energy; enthalpy; equations; fluid mechanics; foams; heat transfer; Latent heat thermal energy storage; liquids; mathematical models; melting; Melting process; momentum; Phase change material; porosity; Porous media; temperature; thermal properties; Porous media; Phase change material; Melting process; Latent heat thermal energy storage
• ISSN: 0306-2619; 1872-9118
• DOI: 10.1016/j.apenergy.2013.02.022

► The non-equilibrium thermal model is adopted in the numerical simulation. ► The thermal conduction is dominant as PCM embedded within metal foam. ► The performance of latent heat storage using metal foam is significantly enhanced. ► The effects of HTF should be considered in real industrial application. In this paper, a numerical model is established to predict the phase change material (PCM) melting process in porous media. The heat transfer enhancement technique using metal foam in a shell-and-tube type latent heat thermal energy storage (LHTES) unit is investigated. The solid–liquid phase change phenomenon is solved with the enthalpy porosity theory. The computational fluid dynamic technology is adopted to predict the flow and heat transfer for the liquid PCM and heat transfer fluid (HTF). The appropriate source terms accounting for the pressure drop caused by the presence of solid PCM and porous media are added to the momentum equations. The solid–liquid interface position and the temperature distribution are predicted to describe the melting process. The effects of the structural parameters of porous media and the inlet conditions of HTF on the thermal characteristics of LHTES unit are analyzed. The numerical model can be further extended to investigate the thermal performance of different types of storage units in LHTES system.