Thermal regulating performance of gypsum/(C18–C24) composite phase change material (CPCM) for building energy storage applications

Karaipekli, Ali; Sarı, Ahmet; Biçer, Alper

doi:10.1016/j.applthermaleng.2016.06.160

Cited by 67 publications

(18 citation statements)

References 33 publications

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“…One of the goals of this work was to accurately determine the compositiono ft he eutectic mixture so that we could prepare samples of the eutectic composition for further investigation. [17] To that end, we determined the binaryp hase diagram of adipic acid and boric acid. Thep hase diagram of the AA-BAb inary eutectic system, shown in Figure 1, indicates that the lowest eutectic melting point was obtained at ac omposition of 80 wt %A Aa nd 20 wt %B A, and that the phase changet emperature was 135.04 8C.…”

Section: Resultsmentioning

confidence: 99%

Thermally Stable Phase Change Material with High Latent Heat and Low Cost based on an Adipic Acid/Boric Acid Binary Eutectic System

et al. 2017

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An adipic acid/boric acid (AA–BA) binary eutectic mixture containing 80 wt % adipic acid and 20 wt % boric acid was investigated as a new phase change material (PCM) with high latent heat, high thermal stability, and low cost. The material′s thermophysical properties and thermal stability were studied using differential scanning calorimetry (DSC), X‐Ray Diffraction (XRD), and thermogravimetric analysis (TGA). The thermal stability was investigated in situ over 100 cycles using DSC. The phase change temperature of the AA–BA binary eutectic mixture was 135.04 °C and the latent heats of the melting and crystallization process were 283.42 and 272.16 J g−1, respectively. The latent heat of melting only dropped 4.94 % after in situ 100 cycles using DSC. Following comparison of thermal properties and price of the AA–BA eutectic mixture PCM with those of some composite PCMs, the results indicate that the newly prepared AA–BA eutectic mixture is a potential phase change material for thermal storage tanks.

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Section: Resultsmentioning

confidence: 99%

Thermally Stable Phase Change Material with High Latent Heat and Low Cost based on an Adipic Acid/Boric Acid Binary Eutectic System

et al. 2017

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“…Therefore, this is an effective way to use solar energy and improve energy efficiency of buildings. 2,3 Solid-liquid PCMs are preferred due to their capability of storing and releasing large amounts of heat within a narrow range of temperature. A PCM impregnated into building walls must have a high latent heat and high thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…A PCM impregnated into building walls must have a high latent heat and high thermal conductivity. 2,3 They should also have a melting temperature slightly above 20°C to meet the need of thermal comfort of the building. According to the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), the recommended comfort room temperature is 21.0°C to 23.0°C in winter and 23.5°C to 25.5°C in summer.…”

Section: Introductionmentioning

confidence: 99%

Binary mixtures of fatty alcohols and fatty acid esters as novel solid‐liquid phase change materials

et al. 2019

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Summary The discovery of new eutectic phase change materials (PCMs) will overcome the current PCM challenges such as nonbiodegradability, super‐cooling, and limited thermal stability. This paper reports on the development of new bio‐based PCMs composed of binary mixtures of fatty acid esters and fatty alcohols at their eutectic compositions, which provide potential solid‐liquid PCMs for building applications. Six binary systems, namely 1‐dodecanol (DD) + methyl stearate (MES), DD + methyl palmitate (MEP), DD + methyl laurate (MEL), 1‐tetradecanol (TD) + MES, TD + MEP, and TD + MEL were prepared and their thermal behaviours were deliberated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), long‐term thermal stability test, and mass loss analysis. Amongst the studied systems, phase change transition temperature and latent heat of fusion of the eutectic mixtures of DD‐MES, DD‐MEP, TD‐MES, and TD‐MEP were found to be suitable for the building application with values of 22.46°C/201.91 J/g, 20.34°C/224.45 J/g, 32.05°C/209.38 J/g, and 26.72°C/210.15 J/g, respectively. The average degree of super‐cooling for all PCMs was below 2°C, and no significant changes in thermophysical properties of the developed PCMs were observed after 1000 thermal cycles.

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“…Thus, PCMs are widely used in building energy conservation . Furthermore, PCMs can be implemented by integration with different building structures such as gypsum board, plaster, concrete, clay minerals, or other wall‐covering materials . However, there are some difficulties in fabrication of building materials containing PCMs.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9] Furthermore,P CMs can be implemented by integration with different buildings tructures such as gypsum board, plaster, concrete,c lay minerals, or other wall-covering materials. [10][11][12] However, there are some difficulties in fabrication of building materials containing PCMs. One is the incorporation of PCMs into construction materials.P CMs in buildingm aterials are usually enclosed in metallic or polymeric capsules,a nd the encapsulation of the PCM is expensive and may affect the mechanical strength of the material or lead to seepage duringt he melting period of PCMs.T herefore, it is necessary to achieve direct heat exchange between the PCMs and the medium to increase thermal energy storage performance.…”

Section: Introductionmentioning

confidence: 99%

Energy‐Efficient Heat Storage using Gypsum Board with Fatty Acid Ester as Layered Phase Change Material

Jeong

Chang

et al. 2017

Energy Tech

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The thermal performance of phase change materials (PCMs) for energy savings is important in various fields. Fatty acid waxes are types of organic fatty acid ester PCMs made from under‐used and renewable feedstocks. However, they possess one major drawback, namely their phase instability in the liquid state. Therefore, to improve stability during phase transitions, a new method of leakage prevention was developed to form the layer. The thermal properties of the layered PCM gypsum boards were analyzed by differential scanning calorimetry (DSC), phase change, enthalpy, and leakage tests. Finally, a dynamic heat transfer analysis of the layered PCM gypsum board was performed for the evaluation of the peak temperature reduction time lag effects of the prepared specimen. The latent heats of palm wax (PW) and beeswax (BW) were 178.1 and 173.6 J g−1 during heating, 159.7 and 140.9 J g−1, during freezing, respectively. Furthermore, the peak temperatures of the three wax‐infused layered PCM gypsum board samples were reduced by 4.6, 6.6 and 0.9 °C, respectively, compared with reference gypsum board.

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Thermal regulating performance of gypsum/(C18–C24) composite phase change material (CPCM) for building energy storage applications

Cited by 67 publications

References 33 publications

Thermally Stable Phase Change Material with High Latent Heat and Low Cost based on an Adipic Acid/Boric Acid Binary Eutectic System

Thermally Stable Phase Change Material with High Latent Heat and Low Cost based on an Adipic Acid/Boric Acid Binary Eutectic System

Binary mixtures of fatty alcohols and fatty acid esters as novel solid‐liquid phase change materials

Energy‐Efficient Heat Storage using Gypsum Board with Fatty Acid Ester as Layered Phase Change Material

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