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

A Characteristic Dimensionless Time in Phase Change Problems

1986 ◽  
Vol 108 (4) ◽  
pp. 310-315 ◽  
Author(s):  
G. C. J. Bart ◽  
C. J. Hoogendoorn ◽  
P. B. J. Schaareman
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Latent Heat ◽  
Analytical Model ◽  
Heat Storage ◽  
Finite Size ◽  
Dimensionless Time ◽  
Latent Heat Storage ◽  
Transition Range ◽  
Change Material

In this paper a comparison is made between an approximate analytical solution and the numerical finite difference solution for the one dimensional solidification of a phase change material of finite size. The analytical model is not only capable of handling materials with a fixed melting temperature but is also extended to cope with materials with a transition range. In the approximate analytical model, use is made of the well known Neumann solution for the solidification in a semi-infinite region. A characteristic dimensionless time has been derived that can be used in a simplified description of the solidification of a phase-change material. With this description the testing of latent heat storage devices can be simplified and the results can also be used in simulation programs of solar energy installations with a latent heat storage.

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