A multi-scale analysis of the impact of pressure on melting of crystalline phase change material germanium telluride

2014 ◽  
Vol 105 (17) ◽  
pp. 173509 ◽  
Author(s):  
Jie Liu
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Crystalline Phase ◽  
Scale Analysis ◽  
Germanium Telluride ◽  
Multi Scale ◽  
The Impact ◽  
Change Material ◽  
Multi Scale Analysis

scholarly journals Numerical Simulation of the Impact of the Heat Source Position on Melting of a Nano-Enhanced Phase Change Material

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1425
Author(s):  
Tarek Bouzennada ◽  
Farid Mechighel ◽  
Kaouther Ghachem ◽  
Lioua Kolsi
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Phase Change Material ◽  
Numerical Study ◽  
Melting Rate ◽  
Heat Transfer Fluid ◽  
Commercial Code ◽  
Tube Position ◽  
The Impact ◽  
Change Material

A 2D-symmetric numerical study of a new design of Nano-Enhanced Phase change material (NEPCM)-filled enclosure is presented in this paper. The enclosure is equipped with an inner tube allowing the circulation of the heat transfer fluid (HTF); n-Octadecane is chosen as phase change material (PCM). Comsol-Multiphysics commercial code was used to solve the governing equations. This study has been performed to examine the heat distribution and melting rate under the influence of the inner-tube position and the concentration of the nanoparticles dispersed in the PCM. The inner tube was located at three different vertical positions and the nanoparticle concentration was varied from 0 to 0.06. The results revealed that both heat transfer/melting rates are improved when the inner tube is located at the bottom region of the enclosure and by increasing the concentration of the nanoparticles. The addition of the nanoparticles enhances the heat transfer due to the considerable increase in conductivity. On the other hand, by placing the tube in the bottom area of the enclosure, the liquid PCM gets a wider space, allowing the intensification of the natural convection.

scholarly journals Latent Heat Thermal Storage of Nano-Enhanced Phase Change Material Filled by Copper Foam with Linear Porosity Variation in Vertical Direction

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1508
Author(s):  
Mohammad Ghalambaz ◽  
Mohammad Shahabadi ◽  
S. A. M Mehryan ◽  
Mikhail Sheremet ◽  
Obai Younis ◽  
...  
Keyword(s):  
Natural Convection ◽  
Phase Change ◽  
Phase Change Material ◽  
Metal Foam ◽  
Vertical Direction ◽  
Melting Time ◽  
Copper Foam ◽  
Average Porosity ◽  
The Impact ◽  
Change Material

The melting flow and heat transfer of copper-oxide coconut oil in thermal energy storage filled with a nonlinear copper metal foam are addressed. The porosity of the copper foam changes linearly from bottom to top. The phase change material (PCM) is filled into the metal foam pores, which form a composite PCM. The natural convection effect is also taken into account. The effect of average porosity; porosity distribution; pore size density; the inclination angle of enclosure; and nanoparticles’ concentration on the isotherms, melting maps, and the melting rate are investigated. The results show that the average porosity is the most important parameter on the melting behavior. The variation in porosity from 0.825 to 0.9 changes the melting time by about 116%. The natural convection flows are weak in the metal foam, and hence, the impact of each of the other parameters on the melting time is insignificant (less than 5%).

scholarly journals Multi-scale analysis of the impact of polylactide morphology on gas barrier properties

Polymer ◽  
2017 ◽  
Vol 108 ◽  
pp. 163-172 ◽  
Author(s):  
Samira Fernandes Nassar ◽  
Alain Guinault ◽  
Nicolas Delpouve ◽  
Véronique Divry ◽  
Violette Ducruet ◽  
...  
Keyword(s):  
Barrier Properties ◽  
Scale Analysis ◽  
Gas Barrier ◽  
Multi Scale ◽  
The Impact ◽  
Multi Scale Analysis ◽  
Gas Barrier Properties

scholarly journals An Integrated Approach to Assess the Impact of PCM [Phase Change Material] to Reduce the Energy Consumption in Buildings-a Review

2018 ◽  
Vol 7 (4.24) ◽  
pp. 100
Author(s):  
Mr. K.Pavan Kumar Reddy ◽  
Dr. B. Nageswara Rao ◽  
Dr. M. Srinivasa Reddy
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Air Temperature ◽  
Building Materials ◽  
Integrated Approach ◽  
Critical Examination ◽  
Latent Heat Storage ◽  
Change Temperature ◽  
The Impact ◽  
Change Material

The achievable joining of Phase Change Material [PCM] in building materials has pulled in a lot of examination intrigue overall due to the need on a dangerous atmospheric deviation and further more the capacity of PCMs to reduce vitality utilization in structures owing to their warm vitality stockpiling capacities. As a substance with high warmth  of combination, PCM is equipped for putting away and discharging enormous measures of vitality inside the assortment of inert warmt in liquefying and hardening forms at the specific change temperature. For as long as 25 years,critical examination has been attempted on potential utilization of PCMs in concrete. Latent Heat Storage [LHS] aimed a PCM is unbelievably alluring because of its high vitality stockpiling thickness and its isothermal conduct all through the stage change process. Expanding the warm stockpiling ability of a building will upgrade the human solace by diminishing the recurrence of inside air temperature swings all together that the inside air temperature is nearer to the pre defined temperature for a broadened measure of time.

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