Response Characteristic of Internal Surface of Phase Change Wall on Outdoor Temperature Changes

In the paper, mathematical model of phase change wall prepared by different ways and common wall was built and simulated by ANSYS. Response characteristic of internal surface of phase change material wall on outdoor temperature changes was studied when phase change material was added into the wall by different ways. Results in this paper can provide the basis for the application of the wall with phase change material.

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Clothing temperature changes of phase change material-treated warm-up in cold and warm environments

Fibers and Polymers ◽

10.1007/bf02875673 ◽

2005 ◽

Vol 6 (4) ◽

pp. 343-347 ◽

Cited By ~ 29

Author(s):

Kyeyoun Choi ◽

Hyejin Chung ◽

Boram Lee ◽

Kyunghee Chung ◽

Gilsoo Cho ◽

...

Keyword(s):

Phase Change ◽

Phase Change Material ◽

Warm Up ◽

Temperature Changes ◽

Change Material

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Validation of a mathematical model for encapsulated phase change material flat slabs for cooling applications

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2011.03.034 ◽

2011 ◽

Vol 31 (14-15) ◽

pp. 2340-2347 ◽

Cited By ~ 42

Author(s):

Ming Liu ◽

Wasim Saman ◽

Frank Bruno

Keyword(s):

Mathematical Model ◽

Phase Change ◽

Phase Change Material ◽

Flat Slabs ◽

Encapsulated Phase Change Material ◽

Change Material

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Mathematical Model of Multi-Layer Wall with Phase Change Material and its Use in Optimal Design

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.649.295 ◽

2013 ◽

Vol 649 ◽

pp. 295-298

Author(s):

Lubomir Klimes ◽

Pavel Charvát ◽

Josef Stetina

Keyword(s):

Mathematical Model ◽

Optimal Design ◽

Phase Change ◽

Phase Change Material ◽

Control Volume ◽

Operational Conditions ◽

Volume Method ◽

The Mathematical Model ◽

Change Material

The paper deals with the mathematical model of the multi-layer wall containing the phase change material (PCM). The model utilizes the effective heat capacity method for modeling the latent heat of phase change and the control volume method is used for the discretization of the model. The utilization of the model is then demonstrated on the problem of the optimal design of the multi-layer wall with the PCM. The TMY2 data for the city of Brno were used in simulations as operational conditions. The main attention is aimed at the determination of the optimal thickness of the PCM layer for the multi-layer wall design with various thicknesses of the masonry.

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Melting Within a Spherical Enclosure

Journal of Heat Transfer ◽

10.1115/1.3245053 ◽

1982 ◽

Vol 104 (1) ◽

pp. 19-23 ◽

Cited By ~ 72

Author(s):

F. E. Moore ◽

Y. Bayazitoglu

Keyword(s):

Mathematical Model ◽

Energy Storage ◽

Flow Field ◽

Phase Change ◽

Experimental Evidence ◽

Phase Change Material ◽

Saturation Temperature ◽

Temperature Profiles ◽

Change Material ◽

Storage Characteristics

Melting of a phase change material within a spherical enclosure is considered. The phase change material is initially at its saturation temperature. Suddenly the enclosure temperature is increased to a fixed value. The density of the solid is assumed to exceed the density of the liquid, the implication being that the solid continually drops toward the bottom of the shell as melting progresses. This motion of the solid generates a flow field within the liquid. A mathematical model is developed and confirmed by experimental evidence. The interface positions and the temperature profiles for various Stefan and Fourier numbers are determined, and the energy storage characteristics are studied. It is found that the convective effects can be neglected only at small Stefan numbers.

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Phase Change Material Freezing in an Energy Storage Module for a Micro Environmental Control System

Journal of Thermal Science and Engineering Applications ◽

10.1115/1.4040697 ◽

2018 ◽

Vol 10 (6) ◽

Cited By ~ 2

Author(s):

H. Ezzat Khalifa ◽

Mustafa Koz

Keyword(s):

Mathematical Model ◽

Phase Change ◽

Phase Change Material ◽

Environmental Control ◽

Finite Thickness ◽

Element Model ◽

Storage Device ◽

Freezing Process ◽

Latent Heat Storage ◽

Change Material

Abstract This study analyzes phase change material (PCM) freezing process in a novel latent heat storage device (LHSD). Heat is removed from the PCM with an embedded evaporator. A mathematical model of freezing in a finite-thickness PCM slab is presented. An experimentally validated reduced-order model (ROM) based on the mathematical model was developed to analyze the heat transfer between the freezing PCM and an evaporating refrigerant flowing inside a flat, microchannel tube coil embedded in the PCM. A detailed finite element model (FEM) of the same device was also developed and employed to verify the validity of the ROM over a wider range of conditions. The freezing times and total “cooling” stored in the PCM computed by the ROM agree very well with those computed by the detailed FEM. The ROM executes in ∼1 min for a full heat exchanger, compared with more than 10 h for the FEM, making the former much more practical for use in parametric analysis and optimization of design alternatives.

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Experimental Research on the Heat Transfer and Mechanical Property of Phase Change Material Wallboards

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.1153 ◽

2013 ◽

Vol 291-294 ◽

pp. 1153-1158

Author(s):

Quan Ying Yan ◽

Ran Huo ◽

Li Hang Yue ◽

Lin Zhang ◽

Li Li Jin

Keyword(s):

Heat Transfer ◽

Mechanical Property ◽

Phase Change ◽

Phase Change Material ◽

Phase Change Materials ◽

Liquid Paraffin ◽

Common Wall ◽

Mixing Method ◽

The Common ◽

Change Material

This paper investigated the heat transfer and mechanical property of phase change material (PCM) walls and common wall. Three mixtures of liquid paraffin-46# paraffin, liquid paraffin- lauric acid and capric-myristic acid were prepared and mixed respectively with high-density polyethylene (HDPE) to prepare shape-stabilized phase change materials. Then direct mixing method was used to add these materials into cement mortar in order to make phase change walls. The results shows that the temperatures and heat flow on phase change walls’ surface are all lower than those of common wall; PCMs of different thermal properties have a more and more obvious distinction in heat storage performance with the increasing content of them added in the wall; PCM walls have lower compressive strength than the common one. Results can provide the basis for the application of phase change material walls in real buildings.

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Numerical Model of Time-Dependent Gas Flows Through Bed of Granular Phase Change Material

International Journal of Computational Methods ◽

10.1142/s0219876219500105 ◽

2019 ◽

Vol 17 (06) ◽

pp. 1950010 ◽

Cited By ~ 4

Author(s):

Nickolay A. Lutsenko ◽

Sergey S. Fetsov

Keyword(s):

Mathematical Model ◽

Energy Storage ◽

Phase Change ◽

Numerical Method ◽

Phase Change Material ◽

Time Dependent ◽

Finite Difference Schemes ◽

Gas Flows ◽

Calculation Results ◽

Change Material

A novel mathematical model and original numerical method for investigating time-dependent gas flows through a bed of granular phase change material (PCM) are proposed and described in detail. Such material is modeled as a porous medium, and continua mechanics method are used for constructing the mathematical model. The numerical method is based on a combination of explicit and implicit finite-difference schemes. Comparison of calculation results with known experimental data demonstrates a very good coincidence. The results of the study can be applied in modeling the thermal energy storage with granular PCM in advanced adiabatic compressed air energy storage and other heat storage devices.

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