engleski

Latent thermal energy storage charging and discharging: a numerical study

In this study charging and discharging processes in a longitudinally finned shell-and-tube latent thermal energy storage (LTES) tank, with water serving as the heat transfer fluid (HTF) and paraffin being used as the phase change material (PCM), have been numerically analyzed. Numerical simulations including both phase change processes have been performed neglecting the influence of natural convection in liquid phase of the PCM and the results have been compared with experimental data. From the comparison, it can be observed that natural convection strongly influences the melting process, while its influence on the solidification process is much less significant. It can be concluded that neglecting natural convection in modeling solidification behavior in longitudinally finned shell-and-tube LTES may be beneficial, since an accurate enough solution could be obtained while significantly reducing computation time. Conclusions drawn from this study can be used in further numerical analyses of LTES charging and discharging processes, which could be expanded by including natural convection in the model to more accurately simulate phase change in longitudinally finned shell-and-tube type LTES.

latent thermal energy storage ; charging and discharging ; numerical investigation

nije evidentirano