Approximate Analytical Model for Solidification Process in a Rectangular Phase-Change Material Storage with Internal Fins

2020 ◽  
pp. 219-229
Author(s):  
R. Kothari ◽  
S. Das ◽  
S. K. Sahu ◽  
S. I. Kundalwal
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Analytical Model ◽  
Solidification Process ◽  
Internal Fins ◽  
Change Material

Numerical Simulation on Melting and Solidification of a Phase-Change Material in an Aluminum Plate-Fin Thermal Storage

2008 ◽  
Author(s):  
Minhui Lv ◽  
Hao Peng ◽  
Xiang Ling
Keyword(s):  
Numerical Simulation ◽  
Phase Change ◽  
Flow Velocity ◽  
Phase Change Material ◽  
Solidification Process ◽  
Thermal Storage ◽  
Aluminum Plate ◽  
Inlet Temperature ◽  
Change Material ◽  
Melting And Solidification

The numerical simulation on melting and solidification process of a phase-change material (PCM) in an aluminum plate-fin thermal storage was performed in this paper. The phase-change material-naphthalene was stored in the stacked passages with fins while water flew along other adjacent passages with fins as the heat transfer fluid (HTF). The PCM stored or released a large amount of heat during melting or solidification. A three-dimensional numerical model was performed to investigate the effect of flow parameters (inlet temperature and flow velocity of HTF) on the melting and solidification time. The results indicated that the rate of phase change was strongly dependent on the inlet temperature and flow velocity of HTF during storing or releasing heat. And the detail description of solidification process were discussed and presented.

scholarly journals Analytical Study of the Solidification of a Phase Change Material in an Annular Space

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5561
Author(s):  
Zygmunt Lipnicki ◽  
Tomasz Małolepszy
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Material ◽  
Solidification Front ◽  
Solidification Process ◽  
Theoretical Research ◽  
Graphical Form ◽  
Annular Space ◽  
Conjugate System ◽  
Change Material

In this study, the process of the solidification of a PCM (phase change material) liquid in an annular space was analytically investigated with the use of a simplified quasi-steady-state model. This model described the phase change phenomenon with the cylindrical solidification front and with the solidification liquid overheated above the solidification temperature. One of the important novelties of the applied model was the determination of the coefficient of the heat transfer between the liquid and the solidified layer on the solidification surface, which was calculated as a function of the location of the solidification front. A method for calculating the variable coefficient of heat transfer on the surface of the solidification front during the solidification process is presented. The contact layer between the cold wall and the solidified layer was incorporated into the model and played an important role. The theoretical analytical method describing the solidification process based on the quasi-steady model was used in the study. Moreover, the main problem considered in this work could be reduced to a conjugate system of differential equations, allowing it to be solved numerically. From this perspective, the influence of various dimensionless parameters on the solidification process could be clearly seen. The obtained numerical results are presented in graphical form. The results of the theoretical research were compared with the experimental research of one of the author’s earlier works and they showed a significant agreement. Finally, the simple analytical approach presented in this work can be used for designing annular heat accumulators.

Thermal Performance Test and Improvement for Phase Change Material Composite through Nucleating Additive

2017 ◽  
Vol 753 ◽  
pp. 44-49
Author(s):  
Yin Zhang ◽  
Yang Ming ◽  
Ming Shan Zhang
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Thermal Performance ◽  
Performance Test ◽  
Solidification Process ◽  
Heat Of Fusion ◽  
Strontium Sulfate ◽  
Change Temperature ◽  
Solid Liquid ◽  
Change Material

Solid-liquid phase change material (PCM) is of high phase change heat and application potentials of thermal energy storage. In this paper, the thermal performance of PCM composites of sodium acetate and urea are investigated through experiment. Moreover, the main thermal-physical properties of such PCM composites with different mixing mass ratios are obtained through T-history method. The results show that with the rising urea mass fraction, both the phase change temperature and latent heat of fusion (enthalpy) decline. It also indicates that strontium sulfate is an effective nucleating additive to decrease super-cooling degree during solidification process for such composite PCM. This work is of high significant in improving the thermal performance of PCM composite and extending its applications.

scholarly journals Effect of Supercooling on the Solidification Process of the Phase Change Material

2017 ◽  
Vol 105 ◽  
pp. 4321-4327 ◽  
Author(s):  
Huoyan Hu ◽  
Xing Jin ◽  
Xiaosong Zhang
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Solidification Process ◽  
Change Material

Analytical model to study the heat storage of phase change material envelopes in lightweight passive buildings

2020 ◽  
Vol 169 ◽  
pp. 106531 ◽  
Author(s):  
Lu Bai ◽  
Jingchao Xie ◽  
Mohammed M. Farid ◽  
Wei Wang ◽  
Jiaping Liu
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Analytical Model ◽  
Heat Storage ◽  
Change Material
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