A numerical investigation of the effect of fin inclination angle on the thermal energy storage performance of a phase change material in a rectangular latent heat thermal energy storage unit

Se Hyun Kim, Sudhanshu Pandey, Seong Hyun Park (Corresponding Author), Man Yeong Ha (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)

Abstract

In a numerical investigation of the thermal energy storage performance of a latent heat thermal energy storage system with three angled fins, the enthalpy-porosity model was used to simulate the phase-change process. To analyze the effect of the angle of inclination of the fin (θf) on the heat transfer characteristics and energy storage performance, a parametric study was performed in which θf was varied over the range −40≤θf≤40. The variation in energy storage performance according to fin angle is also analysed, in order to obtain an optimal fin angle for maximum energy storage performance for the geometric shape of interest. The results reveal that both the heat transfer characteristics and the energy storage performance are affected significantly by variations in θf. For cases where the fins are angled downwards, the upward flow is hampered, and where the fins are angled upwards, natural convection is intensified prior to the onset of thermal stratification. During the final stage of the charging process, the quantity of the remaining solid phase change material in the lower region increases, which delays the melting time. In order to evaluate the energy storage performance, the melting time, the total stored energy, and the mean power were calculated. For θf in the range −30≤θf≤−10, the energy storage performance can exceed that for the case of θf=0. The case of θf=−20 shows the best thermal energy storage performance as the average power is up to 19.3% higher than that for the case of θf=0 among all cases considered in present study.

Original languageEnglish
Article number103957
JournalJournal of Energy Storage
Volume47
DOIs
Publication statusPublished - Mar 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • Angled fins
  • Melting
  • Phase change material
  • Thermal energy storage
  • Thermal energy storage performance

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