The effect of micro-encapsulation on thermal characteristics of metallic phase change materials

Benner, Jingru Z.; Shannon, Rebecca C.; Wu, Wentao; Shen, Lu; Metsack, Austen P.; Zhao, Jingzhou

doi:10.1016/j.applthermaleng.2022.118055

Title: The effect of micro-encapsulation on thermal characteristics of metallic phase change materials

Journal Article · 21 January 2022 · Applied Thermal Engineering

DOI: https://doi.org/10.1016/j.applthermaleng.2022.118055 · OSTI ID:1842663

^[1]; Shannon, Rebecca C. ^[2]; Wu, Wentao ^[3]; Shen, Lu ^[2]; Metsack, Austen P. ^[2];

^[2]

Western New England Univ., Springfield, MA (United States); Western New England University
Western New England Univ., Springfield, MA (United States)
Tennessee State Univ., Nashville, TN (United States)

Micro-encapsulated phase change material with metallic core can work under high temperature for energy storage purpose, making it an appealing candidate for renewable energy technologies, such as thermal energy storage for concentrating solar power plants. Here, the objective of this work is to study the impact of encapsulation on the thermal performance of the micro-encapsulated phase change materials under various operating conditions. To evaluate the thermal performance of the micro-encapsulated phase change material particles, the governing equation of transient heat conduction with phase change in spheres with composite walls is solved numerically. The impact of encapsulation shell on the convective heat transfer rate, total energy absorption, latent heat ratio, energy density, and duration of phase change is presented and analyzed under different operating conditions. Three different core materials including tin, aluminum and copper with distinct Stephan numbers are investigated. In addition to the encapsulation shell effect, this model can be used to study micro-encapsulated phase change materials with different material compositions, core to shell ratios, and it can be used to analyze the impact of air gaps in between materials. Understanding the thermal performance at particle level is essential, and the results of this study could potentially be used as input for thermal energy storage system level analysis, such as the charging and discharging processes.

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Research Organization:: Western New England Univ., Springfield, MA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0009095

OSTI ID:: 1842663

Journal Information:: Applied Thermal Engineering, Journal Name: Applied Thermal Engineering Vol. 207; ISSN 1359-4311

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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The Encapsulation Effect on Thermal Performance of Micro-Encapsulated Phase Change Materials During Energy Absorption Benner, Jingru Z.; Shannon, Rebecca C.; Wu, Wentao ASME 2021 International Mechanical Engineering Congress and Exposition, Volume 11: Heat Transfer and Thermal Engineering https://doi.org/10.1115/IMECE2021-73089	conference	January 2022

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