Acceleration of melting process of phase change material using an innovative triplex-tube helical-coil storage unit: Three-dimensional numerical study

2021 ◽  
Vol 39 ◽  
pp. 102603
Author(s):  
Soroush Entezari ◽  
Amin Taheri ◽  
Meysam Khatibi ◽  
Hamid Niazmand
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Numerical Study ◽  
Three Dimensional ◽  
Melting Process ◽  
Helical Coil ◽  
Storage Unit ◽  
Change Material

Numerical study of melted PCM inside a horizontal annulus with threads in a three-dimensional model

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12178-12185 ◽  
Author(s):  
Tianyu Zhang ◽  
Qing Tang ◽  
Huilin Lu ◽  
Shuai Wang ◽  
Liyan Sun
Keyword(s):  
Phase Change ◽  
Numerical Investigation ◽  
Phase Change Material ◽  
Numerical Study ◽  
Three Dimensional ◽  
Melting Process ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Change Material ◽  
Shell Geometry

This paper presents a numerical investigation of the melting process of a phase change material (PCM) in a tube and shell geometry.

scholarly journals Effects of Pressure-Induced Density Changes in the Thermal Energy Absorbed by a Micro-Encapsulated Phase-Change Material

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1254 ◽  
Author(s):  
Ernesto Hernández-Cooper ◽  
José Otero
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Mass Conservation ◽  
Melting Process ◽  
Thermal Balance ◽  
Rate Of Change ◽  
Storage Unit ◽  
Proposed Model ◽  
Change Material

Density changes produced by pressure increments during melting of a spherically confined phase-change material have an impact on the thermal energy absorbed by the heat storage unit. Several authors have assumed incompressible phases to estimate the volume change of the phase-change material and the thermal balance at the liquid–solid interface. This assumption simplifies the problem but neglects the contribution of density changes to the thermal energy absorbed. In this work, a thermal balance at the interface that depends on the rate of change of the densities and on the shape of the container is found by imposing total mass conservation. The rigidity of the container is tuned through the coupling constant of an array of springs surrounding the phase-change material. This way, the behavior of the system can be probed from the isobaric to the isochoric regimes. The sensible and latent heat absorbed during the melting process are obtained by solving the proposed model through numerical and semi-analytical methods. Comparing the predictions obtained through our model, it is found that even for moderate pressures, the absorbed thermal energy predicted by other authors can be significantly overestimated.

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