scholarly journals Preparation and Property Modification on Novel Energy Storage Material: n-Octadecane PCMs/Expanded Perlite Composite Gypsum Board

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Jianping Zhu ◽  
Benkai Guo ◽  
Huanhuan Hou ◽  
Wenyan Zhang
Keyword(s):  
Mechanical Properties ◽  
Energy Storage ◽  
Building Materials ◽  
Phase Change Materials ◽  
Volume Fraction ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Expanded Perlite ◽  
Gypsum Board ◽  
Transfer Delay

Phase change materials (PCMs) have been widely used to improve the thermal energy storage capacity of building materials. In this study, the n-octadecane (OD)/expanded perlite (EP) composite PCM, which was prepared by incorporation of liquid n-octadecane into EP using the vacuum impregnation method, was used to fabricate the gypsum board. The microscopic, thermal, and mechanical properties were studied. The SEM results showed that OD could be absorbed into the pores of EP uniformly. The FI-IR results showed that OD and EP have good chemical stability. It was found that the gypsum board has best heat transfer delay when the volume fraction of OD/EP was 20% (v/v). The mechanical property of the gypsum board with OD/EP decreased. To deal with the problem, the effect of nano-Al2O3 on the gypsum board was also studied. The results showed that the mechanical properties of the gypsum board were effectively increased when the dosage of nano-Al2O3 was 0.5 wt.%, and the gypsum board had the best thermal insulation effect when the nano-Al2O3 content was 0.3 wt.%. Considering the cost and the comprehensive property, it was suggested that the optimal addition content of nano-Al2O3 was 0.3 wt.%.

Preparation of Energy Storage Ceramsite Manufactured from East Lake Sludge

2011 ◽  
Vol 287-290 ◽  
pp. 694-698
Author(s):  
Bao Guo Ma ◽  
Jun Wang ◽  
Yuan Yuan Wu ◽  
Wen Yang
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Latent Heat ◽  
Building Materials ◽  
Melting Process ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Combination Methods ◽  
East Lake ◽  
Lake Sludge

Phase change material (PCM) can absorb or release a large quantity of latent heat when it changes phase from solid state to liquid state or vice versa, and has very important applications in thermal energy storage systems. One of the combination methods is incorporating PCM in porous building materials, which are suitable matrix materials for PCM. In this paper, two kinds of ceramsite manufactured from East Lake sludge and paraffin were selected to form phase change composites by using the vacuum impregnation method. Differential scanning calorimeter (DSC) analysis was used to evaluate the phase change behavior. The result showed that the peak temperature (TP) and latent heat of the melting process of the paraffin in ceramsite A and B was a little higher than that of the bulk paraffin.

Sepiolite supported stearic acid composites for thermal energy storage

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112493-112501 ◽  
Author(s):  
Qiang Shen ◽  
Songyang Liu ◽  
Jing Ouyang ◽  
Huaming Yang
Keyword(s):  
Energy Storage ◽  
Stearic Acid ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Composite Phase Change Materials

In this paper, novel composite phase change materials (PCMs) were prepared by absorbing stearic acid (SA) into sepiolite (α-sepiolite, β-sepiolite) via a vacuum impregnation method.

Diatomite/Palm Wax Composite as a Phase Change Material for Latent Heat Storage

2015 ◽  
Vol 1126 ◽  
pp. 33-38 ◽  
Author(s):  
Jan Fořt ◽  
Anton Trník ◽  
Milena Pavlíková ◽  
Zbyšek Pavlík
Keyword(s):  
Phase Change ◽  
Latent Heat ◽  
Building Materials ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Heat Storage ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Latent Heat Storage ◽  
Polymer Encapsulation

Wider application of commercially produced phase change materials in production of building composites is limited due to their higher price and the inert polymer encapsulation which negatively affects mechanical parameters. This paper is focused on preparation of the composite material for energy savings. The phase change composite is prepared by soaking palm wax into the structure of diatomite powder using vacuum impregnation method. The compatibility of diatomite and palm wax in a newly developed PCM structure is investigated by FTIR spectroscopy. The improved thermal storage properties obtained by DSC analysis reveal melting temperature at 55.9°C and the phase change latent heat of 78.0 J/g. The laser diffraction based devise is used to determine the particle size distribution in order to assess the suitability of the developed wax/diatomite based composite for the cement based building materials. The obtained results indicate promising results from the point of view of improved latent heat storage at reasonable cost.

Polymer-Based Repair Mortar Containing Waste Perlite Powder

2021 ◽  
Vol 898 ◽  
pp. 73-79
Author(s):  
Radek Hermann ◽  
Jakub Hodul ◽  
Aleš Jakubík
Keyword(s):  
Mechanical Properties ◽  
Bonding Strength ◽  
Building Materials ◽  
Expanded Perlite ◽  
High Bonding Strength ◽  
Repair Mortar ◽  
Very High

This paper deals with the problematics of utilization of waste perlite from production of expanded perlite in polymer-based material. The goal of this paper is to develop repair mortar containing as high amount of waste perlite as possible as substitution for filler. The resulting mortar exhibits very high physical-mechanical properties such as high bonding strength to a large variety of building materials. The microstructure and the re-dispersibility of filler were also studied.

Study on the Thermal Properties of Paraffin/Expansion Perlite Composite Phase Change Mortar

2011 ◽  
Vol 374-377 ◽  
pp. 1274-1277 ◽  
Author(s):  
Qing Wang ◽  
Jing Zhang ◽  
Jing Da ◽  
Hui Zhao ◽  
Kun Ran
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Phase Change ◽  
Phase Change Materials ◽  
Paraffin Wax ◽  
Expanded Perlite ◽  
Cooling Process ◽  
Heating And Cooling ◽  
As Adsorption

Phase change materials were prepared by the paraffin wax as phase change materials and expanded perlite as adsorption carrier in this paper. Phase change mortar was prepared by part of the sand been replaced. The heat ability which adjusts and stores heat in the heating and cooling process with different phase change materials was researched and its mechanical properties were tested and evaluated.

scholarly journals Characterization of MgCl2·6H2O-Based Eutectic/Expanded Perlite Composite Phase Change Material with Low Thermal Conductivity

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2369 ◽  
Author(s):  
Chao Zhang ◽  
Zeyu Zhang ◽  
Rongda Ye ◽  
Xuenong Gao ◽  
Ziye Ling
Keyword(s):  
Thermal Conductivity ◽  
Phase Separation ◽  
Phase Change ◽  
Phase Change Materials ◽  
Impregnation Method ◽  
Expanded Perlite ◽  
Thermal Reliability ◽  
Low Thermal Conductivity ◽  
Human Thermal Comfort ◽  
Save Energy

The melting points of the phase change materials (PCMs) incorporated into the walls of buildings should be within the human thermal comfort temperature range. In this paper, 15 wt.% of MgCl2·6H2O was mixed with CaCl2·6H2O to obtain the eutectic with a melting point of 23.9 °C. SrCl2·6H2O suppresses the supecooling of the eutectic. The combination with expanded perlite (EP) via the impregnation method overcomes the phase separation and liquid leakage of the CaCl2∙6H2O-MgCl2∙6H2O mixture. The composite PCM is form-stable with the maximum loading mass fraction up to 50 wt.% and latent heat of 73.55 J/g. EP also significantly reduces the thermal conductivity of the CaCl2∙6H2O-MgCl2∙6H2O from 0.732 to 0.144 W/(m·K). The heating-cooling cycling test reveals that the composite PCM is thermally stable. The cheap eutectic salt hydrate, with little supercooling, no phase separation and liquid leakage, low thermal conductivity and good thermal reliability, show great potential as envelope materials to save energy consumption in buildings.

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