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Journal articles on the topic 'Composite phase change material'

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Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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1

Shi, Qi Song, and Tai Qi Liu. "Preparation and Performance of Polyethylene Glycol / Polyacrylamide Phase Change Material." Advanced Materials Research 284-286 (July 2011): 1983–86. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.1983.

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This study involved the preparation and characterization of polyethylene glycol (PEG)/ polyacrylamide (PAM) composite as solid-solid phase change materials (PCM). In this study, the polyethylene glycol / polyacrylamide composites as solid-solid phase change material was prepared, and the phase change behavior and crystalline morphology of the phase change materials were investigated using differential scanning calorimeter (DSC) , wide-angle X-ray diffraction (WAXD). Results indicated that the composite remained solid when the weight percentage of PEG was less than 60%. The PEG/PAM composite that exhibited solid-solid phase change behavior can be used as a new kind of phase change material for the shortage of thermal energy and temperature control.
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2

Hou, Changlin, Wei Zhang, Renshan Chen, and Haonan SG. "Study on Temperature Control and Anti-icing Performance of Asphalt Pavement Based on Composite Phase Change Material with Wide Phase Change Interval." Journal of Physics: Conference Series 2393, no. 1 (December 1, 2022): 012031. http://dx.doi.org/10.1088/1742-6596/2393/1/012031.

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Abstract To improve the temperature regulation effect of phase change materials on asphalt pavement, phase change materials A and B were prepared for the optimal phase change temperature range of anti-condensation ice and snow melting at -5°C~5°C in this paper. According to the phase change temperature range of phase change materials A and B, the phase change material composite optimization temperature regulation performance test was carried out to form a composite phase change material with temperature gradient laps. The influence of composite phase change materials on asphalt performance was tested. The test shows that the best composite ratio of phase change material A and phase change material B is 5:1, and the temperature regulation performance of composite phase change material is better than that of A and B alone. The ability of composite phase change material to inhibit cooling increases with the amount of admixture, and the best admixture ratio in the mixture is 5 ‰ of the total mass of the mixture.
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3

Mao, Jun, Shui Lin Zheng, Yu Zhong Zhang, Yan Ping Bai, and Yue Liu. "Preparation and Characterization of Diatomite Loaded Composite Phase Change Materials." Applied Mechanics and Materials 320 (May 2013): 314–19. http://dx.doi.org/10.4028/www.scientific.net/amm.320.314.

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Organic phase change materials like paraffin as phase change material, modified diatomite as carrier, composite phase change material with proper phase change temperature and larger phase change enthalpy is prepared by melt blending. The structure and performance of composite phase material are characterized using SEM, FI-IR and synthesized thermal analyzer DSC. The results show that the phase change temperature of composite phase change material is 30, and phase change enthalpy is 89.54J/g. With every part preserved, phase change particles are distributed in the diatomite/melted paraffin matrix evenly. Stable composite phase change materials are prepared with diatomite as carrier and paraffin as PCM, which are bonded with Vander Waals forces in the form of physical adsorption.
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4

Wu, Wei, Yu Feng Chen, Xing Shi, Shi Chao Zhang, and Hao Ran Sun. "Preparation and Properties of Polyalcohol Phase Change Material for Insulation." Key Engineering Materials 512-515 (June 2012): 936–39. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.936.

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In this paper, the composite phase change materials for insulation were prepared by melt-soaking method. Trimethylolethane (PG) was chosen to be the phase change material (PCM) and two kinds of porous materials as the supporting matrices separately. The effects of both matrices to PG were analyzed by X-ray diffraction (XRD), and the heat insulation properties of composites were evaluated by Plat heat insulation test device. At last, microstructures of composites were observed by scanning electron microscope (SEM) and their effects to composites were discussed.
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5

Jiang, Feng, Yong Le Hou, Yong Lin Hu, Wei Dong Zhu, and Qing Hua Wang. "Setting for the Application of Phase Change Paraffin in Block Masonry." Applied Mechanics and Materials 448-453 (October 2013): 1308–11. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.1308.

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This paper studies the insulation properties of masonry filling paraffin composite phase change material. With high density polyethylene (HDPE) as wrapping materials and solid-liquid mixing paraffin as phase change materials, solid-liquid mixed paraffin phase change material with different amount of admixture is prepared, and the problem of flowing after paraffin phase change is then solved. The phase change temperature and the phase change latent heat of composite phase change material with different amount of admixture are tested. The results showed that the composite material with 30% of 52 # solid paraffin, 70% of liquid paraffin, 70% of HDPE coating performs best as to the phase transition temperature and latent heat. On this basis, This paper studies the composite phase change wall with phase change materials 0%, 33%, 66% and100%. Results show that the composite phase change material wall’s heat preservation performance has significantly improved. the temperature fluctuation range of internal and external wall surface is 4.2 °C lower than unfilled wall.
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6

Liang, Jiyuan, Xuelai Zhang, and Jun Ji. "Hygroscopic phase change composite material——A review." Journal of Energy Storage 36 (April 2021): 102395. http://dx.doi.org/10.1016/j.est.2021.102395.

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7

FUKUCHI, Kohei, Katsuhiko SASAKI, Yusuke TOMIZAWA, Ken-ichi OHGUCHI, Ryohei SUZUKI, Tsuyoshi TAKAHASHI, and Takahito EGUCHI. "Strength Properties of Composite Material Containing Phase Change Material." Proceedings of Mechanical Engineering Congress, Japan 2018 (2018): J0450403. http://dx.doi.org/10.1299/jsmemecj.2018.j0450403.

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8

Pop, Lucian-Cristian, Mihaela Baibarac, Ion Anghel, and Lucian Baia. "Gypsum Composite Boards Incorporating Phase Change Materials: A Review." Journal of Nanoscience and Nanotechnology 21, no. 4 (April 1, 2021): 2269–77. http://dx.doi.org/10.1166/jnn.2021.18957.

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The purpose of this review is to provide an overview of the available gypsum based composite including various phase change materials employed to increase the thermal energy storage capacity of building materials. A wide range of materials such as n-alkane, saturated fatty acid, fatty acid esters etc are used as phase change materials. Adding carbonaceous material (carbon nanofibers, activated nanocarbon, graphite nanosheets etc.) to augment some properties is also a common practice. In addition, there are presented the methods of obtaining the nano/macro-composites together with some thermal characteristics of the newly prepared materials.
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9

Zong, Jianping, Defu Wang, Yanlin Jin, Xing Gao, and Xinxin Wang. "Preparation of Stearic acid/Diatomite Composite Phase Change Material." E3S Web of Conferences 245 (2021): 03070. http://dx.doi.org/10.1051/e3sconf/202124503070.

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The composite phase change material was prepared via the impregnation method using diatomaceous as the carrier and stearic acid as the phase change material. The effects of diatomite content, temperature, immersion time and pressure on the mass ratio of stearic acid and diatomaceous earth in the composite phase change materials were discussed. The experimental results showed that the optimum conditions for preparing stearic acid/diatomite composite phase change material were immersion temperature of 80℃, socking time of 2 h, diatomite mass fraction of 23.04%, and vacuum degree of 0.03 MPa. Finally, the infrared spectroscopy analysis of stearic acid/diatomite composite phase change energy storage material showed that there is no chemical reaction between stearic acid and diatomite. And they are held together by intermolecular forces.
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10

Zhao, Liang, Xiang Chen Fang, Gang Wang, and Hong Xu. "Preparation and Properties of Paraffin/Activated Carbon Composites as Phase Change Materials for Thermal Energy Storage." Advanced Materials Research 608-609 (December 2012): 1049–53. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.1049.

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Paraffin/activated carbon composites as phase change energy storage materials were prepared by absorbing paraffin into activated carbon. In composite materials, paraffin was used as phase change material (PCM) for thermal energy storage, and activated carbon acted as supporting material, ethanol was the solvent. A series of characterization were conducted to analyse and test the performance of the composite materials, and differential scanning calorimeter (DSC) results showed that the PCM-2 composite has the melting latent heat of 51.7 kJ/kg with melting temperature of 60.4°C. Due to the capillary and surface tension forces between paraffin and activated carbon, the leakage of melted paraffin from the composites can be prevented. In a word, the paraffin/activated carbon composites have a good thermal stability and can be used repeatedly.
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11

Zhao, Liang, Rui Ying Ma, Xiang Lan Meng, Gang Wang, and Xiang Chen Fang. "Characterization and Preparation of Paraffin/Modified Inorganic Porous Materials Composites as Building Energy Storage Materials." Advanced Materials Research 450-451 (January 2012): 1419–24. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.1419.

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Paraffin and modified inorganic porous materials composites as phase change energy storage materials were prepared by absorbing paraffin in porous network of inorganic materials. In composite materials, paraffin was used as phase change material (PCM) for thermal energy storage, and γ-Al2O3 acted as supporting material, ethanol was solvent. A series of characterization were conducted to analyse and test the performance of the composite materials, and differential scanning calorimeter (DSC) results showed that the PCM-3 composite has the melting latent heat of 115.9 kJ/kg with melting temperature of 63.0°C. Due to the capillary and surface tension forces between paraffin and γ-Al2O3, the leakage of melted paraffin from the composites can be prevented. Several kinds of paraffin mixtures were also studied by adsorbing into the supporting materials, so that the composite energy storage materials with different phase change temperature can be used in the building wall to storage thermal of different regions. In a word, the paraffin/γ-Al2O3 composites have a good thermal stability and can be used repeatedly.
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12

Cao, Jiahao, Jinxin Feng, Xiaoming Fang, Ziye Ling, and Zhengguo Zhang. "A delayed cooling system coupling composite phase change material and nano phase change material emulsion." Applied Thermal Engineering 191 (June 2021): 116888. http://dx.doi.org/10.1016/j.applthermaleng.2021.116888.

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13

Deng, Jian Hong, Wen Biao Li, and Da Hua Jiang. "Study on Binary Fatty Acids/ Sepiolite Composite Phase Change Material." Advanced Materials Research 374-377 (October 2011): 807–10. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.807.

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Lauric acid/stearic acid as the binary phase change materials, modified sepiolite as the inorganic carrier, organic/inorganic composite energy storage materials was prepared by melting adsorption.Comprehensive experiment results show that binary phase change material is lower than single one at initial phase change temperature and phase change peak temperature, and it has good energy storage results, the composite material can be used in energy storage and heat recovery system to save energy.
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14

Sarı, Ahmet, Alper Biçer, and Gökhan Hekimoğlu. "Effects of carbon nanotubes additive on thermal conductivity and thermal energy storage properties of a novel composite phase change material." Journal of Composite Materials 53, no. 21 (October 23, 2018): 2967–80. http://dx.doi.org/10.1177/0021998318808357.

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Fatty acids are commonly preferred as phase change materials for passive solar thermoregulation due to their several advantageous latent heat thermal energy storage (LHTES) properties. However, further storage container requirement of fatty acids against leakage problem during heating period and also low thermal conductivity significantly limit their application fields. To overcome these drawbacks of capric acid–stearic acid eutectic mixture as phase change material, it was first impregnated with expanded vermiculite clay by melting/blending method and then doped with carbon nanotubes. The effects of carbon nanotubes additive on the chemical/morphological structures and LHTES properties of the composite phase change material and thermal enhanced change phase change materials were investigated by scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry and thermogravimetric analysis analysis techniques. The differential scanning calorimetry results showed that the form-stable composite phase change materials and thermal enhanced composite phase change materials have melting temperatures in the range of 24.35–24.64℃ and latent heat capacities between 76.32 and 73.13 J/g. Thermal conductivity of the composite phase change materials was increased as 83.3, 125.0 and 258.3% by carbon nanotubes doping 1, 3 and 5 wt%. The heat charging and discharging times of the thermal enhanced -composite phase change materials were reduced appreciably due to the enhanced thermal conductivity without notably influencing their LHTES properties. Furthermore, the thermal cycling test and thermogravimetric analysis findings proved that all fabricated composites had admirable thermal durability, cycling LHTES performance and chemical stability.
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15

Wei, Feng Lan, Xiang Zhao, E. Liu, Chun Long Li, and Zhe Mao. "Research of Preparation Process of Amorphous Composite Phase Change Material by Orthogonal Test Method." Advanced Materials Research 557-559 (July 2012): 309–12. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.309.

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To prepare shape-stabilized phase change material applicable in digester insulation, firstly to prepare composite phase change material by sol-gel method. Shape material was obtained by sol-gel with TEOS, in which phase change material was lauric acid/cetyl alcohol binary eutectic phase change materials. T he result s showed that the descending order of the influencing factors: ester-PCM ratio, ester -water ratio, pH, the react ion temperature, aging temperature. The best technology is: the ester -water ratio1:8, ester-PCM ratio1:2.3, pH3, aging temperature 85°C, the react ion temperature 60°C. When composite phase change material was prepared with the best technology, phase transition temperature of composite phase change material is 34°C, phase change enthalpy can reach 122.4J/g when the mass fraction of phase change material is 64%.
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16

Chen, Zhi, Menghao Qin, and Jun Yang. "Synthesis and characteristics of hygroscopic phase change material: Composite microencapsulated phase change material (MPCM) and diatomite." Energy and Buildings 106 (November 2015): 175–82. http://dx.doi.org/10.1016/j.enbuild.2015.05.033.

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17

Fořt, Jan, Anton Trník, Milena Pavlíková, and Zbyšek Pavlík. "Diatomite/Palm Wax Composite as a Phase Change Material for Latent Heat Storage." Advanced Materials Research 1126 (October 2015): 33–38. http://dx.doi.org/10.4028/www.scientific.net/amr.1126.33.

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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.
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18

Zhang, Yin, Yang Ming, and Ming Shan Zhang. "Thermal Performance Test and Improvement for Phase Change Material Composite through Nucleating Additive." Key Engineering Materials 753 (August 2017): 44–49. http://dx.doi.org/10.4028/www.scientific.net/kem.753.44.

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Solid-liquid phase change material (PCM) is of high phase change heat and application potentials of thermal energy storage. In this paper, the thermal performance of PCM composites of sodium acetate and urea are investigated through experiment. Moreover, the main thermal-physical properties of such PCM composites with different mixing mass ratios are obtained through T-history method. The results show that with the rising urea mass fraction, both the phase change temperature and latent heat of fusion (enthalpy) decline. It also indicates that strontium sulfate is an effective nucleating additive to decrease super-cooling degree during solidification process for such composite PCM. This work is of high significant in improving the thermal performance of PCM composite and extending its applications.
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19

Wang, Qing, Tao Jun Wu, Zhao Yang Ding, and Cun Bao Zhang. "Preparation of Ternary Composite Phase Change Storage Mortar." Applied Mechanics and Materials 672-674 (October 2014): 533–37. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.533.

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In this paper, ternary composite paraffin was used as raw material, vitrified microsphere and expanded pearlite were used as carrier, styrene-acrylic emulsion and EVA emulsion as encapsulated to prepare phase change energy storage mortar. According to paraffin adsorption capacity, leakage and other performance tests , the appropriate carrier and encapsulate materials were selected . The results show that, through both temperature-time curve test and DSC analysis, the best ratio of 3# paraffin to n-tetradecane to solid paraffin is 1:2:7. Vitrified microsphere as carrier, the amount of paraffin under vacuum adsorption condition for 30mins is 502.2% which is much higher than that of expanded pearlite. Styrene-acrylic emulsion as encapsulate material, the leakage of paraffin problem can be solved effectively, and in this case, the minimum leakage of paraffin/vitrified microsphere is only 4.42%. The compressive strength of paraffin/vitrified microsphere phase change energy storage mortar is 5.35 MPa, the thermal conductivity is 0.3372 W/m·K which improved the insulation performance of mortar significantly.
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20

TOMIZAWA, Yusuke, Katsuhiko SASAKI, Akiyoshi KURODA, and Ryo TAKEDA. "Strength of Resin Composite Material Containing Microencapsulated Phase Change Material (MPCM)." Proceedings of Mechanical Engineering Congress, Japan 2016 (2016): J0410302. http://dx.doi.org/10.1299/jsmemecj.2016.j0410302.

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21

Li, Wei Hua, Jin Feng Mao, Li Jun Wang, and Lu Yan Sui. "Effect of the Additive on Thermal Conductivity of the Phase Change Material." Advanced Materials Research 399-401 (November 2011): 1302–6. http://dx.doi.org/10.4028/www.scientific.net/amr.399-401.1302.

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The aim of the paper is to analyze the effect of the additives on thermal conductivity of the phase change material. The experiment about heat storage and heat release performance of the composite phase change material which uses sodium acetate trihydrate as host material is studied. The effect of the expanded graphite on the composite phase change material is investigated. The results show that: expanded graphite which can be dispersed evenly in the composite phase change material, the thermal stability is well, significantly improve the thermal conductivity of the composite phase change material.
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22

Xia, Xin, Yu Zhang, Qun Hua Li, and Cong Li. "Preparation and Characterization of Thermochromic Phase Change Nanofibers/ Woven Composite Material." Advanced Materials Research 1048 (October 2014): 427–31. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.427.

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In order to get a stable heat preserved property of temperature control textile, the sandwich structure of thermochromic phase change nanofibers/ woven composite materials was made by electrospinning, weaving and simple suture. In this material, the thermochromic powder acted as a temperature indicator, lauric acid is selected as phase change material. The morphologies and heat preserved property were characterized by SEM, a digital single lens camera and an increase-decreased temperature system test, respectively. The results showed that such composite materials exhibited an obviously heat preserved property; it took 17mins to decrease the temperature from 50 °C to 30 °C, which was 4 mins longer than the weaves.
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23

Hoe, Alison, Michael T. Barako, Achutha Tamraparni, Chen Zhang, Alaa Elwany, Jonathan R. Felts, and Patrick J. Shamberger. "Objective oriented phase change material composite heat sink design." Applied Thermal Engineering 209 (June 2022): 118235. http://dx.doi.org/10.1016/j.applthermaleng.2022.118235.

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24

Darkwa, J., and T. Zhou. "Enhanced laminated composite phase change material for energy storage." Energy Conversion and Management 52, no. 2 (February 2011): 810–15. http://dx.doi.org/10.1016/j.enconman.2010.08.006.

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25

Cheng, Peng, Kun Wei, Wenshuo Shi, Jiahao Shi, Sifan Wang, and Biao Ma. "Preparation and performance analysis of phase change microcapsule/epoxy resin composite phase change material." Journal of Energy Storage 47 (March 2022): 103581. http://dx.doi.org/10.1016/j.est.2021.103581.

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26

Cui, H. Z., and G. F. Zhu. "Preparation of Phase-Change-Material/Lightweight Aggregate Composite as an Energy Storage Material." Advanced Materials Research 347-353 (October 2011): 3404–8. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.3404.

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In this paper, a phase-change-material/lightweight aggregate (PCM-LWA) composite thermal energy storage material was prepared by absorbing the lauryl alcohol, which is one kind of phase change materials, into porous lightweight aggregates (LWAs) that have an excellent absorbability. In such a composite, the lauryl alcohol serves as a latent heat storage material and the porous lightweight aggregate acts as the supporting material. In order to prevent the melted lauryl alcohol leak from the porous LWAs, surface seal processing for the PCM-LWA was necessary. In this research, pure cement paste and polymer modified cement paste were used to seal the PCM-LWA surface. Through comparison between the differential scanning calorimetry (DSC) tests for lauryl alcohol and PCM-LWA, it can be known that the solid-liquid phase change temperature of the composite PCM-LWA was slightly higher than that of the lauryl alcohol, and latent heat of the PCM-LWA was smaller than that of the pure PCM.
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27

Zhang, Shi Chao, Guang Hai Wang, Wei Wu, Yu Feng Chen, and Hao Ran Sun. "Study on Properties and Application of PG/CS Composite PCMs." Key Engineering Materials 602-603 (March 2014): 624–27. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.624.

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Tris (hydroxymethyl) ethane (PG) as a phase change material, micro-porous xonotlite (CS) as matrix, PG/CS composite PCMs were prepared by melt-soaking method, and the effect of micro-porous structure of xonotlite on heat absorption capacity, bending strength and insulation performance of composites, and the exudation of PG was studied. Otherwise, for the work environment and characteristics of propulsive device of vehicle, this paper explored the feasibility that phase change materials (PCMs) worked as the insulation material in short-time insulation system of the vehicle. Experimental results show that, when the most probable pore diameters of xonotlite was not less than 63nm, the composites presented better and almost same absorption capacities of matrix (CS) to PCM (PG) in different composites; when up to 85nm, the composite exhibited the lowest leakage rate (less than 5%), the optimal mechanical property and thermal insulation performance. This Study proposed a new idea for the design of the insulation material in the thermal protection system of propulsive device of vehicle.
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28

Jiang, Da Hua, An Gui Li, Fa En Shi, and Ru Shan Ren. "Mineral Sepiolite Energy-Saving Residential Materials." Advanced Materials Research 178 (December 2010): 185–90. http://dx.doi.org/10.4028/www.scientific.net/amr.178.185.

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Mineral sepiolite as inorganic carrier, lauric acid(LA)-stearic acid(SA)as binary PCM(phase change material), CTAB as modifier, ethanol as solvent, mineral energy storage residential composite was prepared by intercalation, and the properties of composites were characterized using thermogravimetry(TG)/differential thermal analysis(DTA),scanning electron microscope(SEM),X-ray diffraction(XRD).Orthogo-nal experimental results show that the optimum proportion of composite materials is A3B2C1D3, the initial phase change temperature is 31.44 °C, phase transition peak temperature is 35.25°C, a wide range of endothermic peak is between 30.0~40.0°C, scope of phase change temperature is 3.81. LA-SA eutectic mixture could be retained by adding into 42.3 wt% porous sepiolite, treated at 80 °C. The weight loss of the composites is no more than 2% when melting/freezing cycling within 100°C, so it has good thermal reliability when applied to building material. Mainly due to relatively high content of mineral impurity, high temperature and CTAB can significantly help improve adsorption rate of mineral sepiolite. Sepiolite as a carrier material has features with low cost, broad sources, non-toxic and non-pollution. The composite material is a healthy residential energy-saving material, and it provides a good prospect for the realization of building energy efficiency, regulating room temperature in summer, and improving human comfort.
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29

Zhu, Hongzhi, Bin Guo, and Zhi Li. "Preparation, Encapsulation, and Performance Evaluation of Ternary Phase Change Materials for Building Envelope." Advances in Civil Engineering 2022 (April 1, 2022): 1–7. http://dx.doi.org/10.1155/2022/8246365.

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Background. In order to make up for the defect that a single phase change material cannot meet the phase change temperature in a specific application field, three kinds of materials with higher phase change temperature are selected in this paper. Through the phase change material composite method, it was adopted to carry out step cooling curve test and differential scanning calorimetry (DSC) test, based on the second law of thermodynamics and the theory of phase equilibrium. DSC thermal analysis and Fourier transform infrared spectroscopy (FT-IR) characterization were carried out. The phase change diatomite was used for packaging materials and durability evaluation. The results show that when TD-MA : LA = 6.2 : 3.8, the phase transition temperature of the experimental ternary composite phase change material is 20.1°C. The adsorption of diatomite to phase change material (PCM) is only physical adsorption, and the thermal stability is good after 100 phase change cycles. The maximum mass loss rate of phase change diatomite encapsulated by phenylpropene emulsion and cement powder is only 0.65%, at last, this phase change diatomite is suitable for building envelope structure.
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30

Wang, Yan Jin, Hong Ge Tao, and Zhi Ping Zhang. "Experimental Study of Binary Composite Phase Change Material for Building." Applied Mechanics and Materials 253-255 (December 2012): 354–57. http://dx.doi.org/10.4028/www.scientific.net/amm.253-255.354.

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Phase change energy storage building material has become a widespread attention for the field of building energy conservation because of its excellent storage properties. The phase change material which is able to adjust the indoor temperature, belongs to the low temperature phase change material. There are lots of kinds of it, and then how to find a suitable phase change material has become a key problem. In this paper, the characteristics of the inorganic material, single organic material, and binary organic material were tested, and the phase change temperature and latent heat of composited phase change material were analysed by differential scanning calorimetry(DSC), which could provide a theoretical basis for the search for the appropriate phase change material.
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31

Zhang, Yin, Xin Wang, Zhiyuan Wei, Yinping Zhang, and Ya Feng. "Sodium acetate–urea composite phase change material used in building envelopes for thermal insulation." Building Services Engineering Research and Technology 39, no. 4 (November 13, 2017): 475–91. http://dx.doi.org/10.1177/0143624417743491.

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Integrating phase change material with building envelopes is an effective way to reduce cooling or heating loads, improve indoor thermal comfort and save building energy consumption. In this paper, the composite phase change material of sodium acetate and urea is prepared and its thermal–physical properties with different mixing mass ratios are investigated through experiment and T-history method. Moreover, the heat transfer model of building envelopes with phase change material is established and different phase change material locations in external walls for thermal insulation are compared based on integrated uncomfortable degree. The results show that (1) with rising urea mass fraction, both phase change temperature and latent fusion heat (enthalpy) decline; (2) strontium sulfate is an effective nucleating additive to decrease super-cooling degree for such phase change material solidification and (3) to improve indoor thermal comfort, it is preferable to put phase change material in the middle of external walls. Furthermore, the illustrative example of an office building in Chengdu indicates that phase change material insulation can lead to time lag and decrement for indoor air temperature variations. It also indicates that after inserting such phase change material into building external wall, the highest indoor temperature can be decreased by 7℃, leading to 60% cooling energy saving in one typical summer day. This work can provide guidance for building thermal design with phase change materials. Practical application:The studied sodium acetate–urea composite phase change material has been used as energy storage and thermal insulation materials inserted in envelopes for the demonstration project of low/zero energy consumption passive buildings in China.
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32

Park, Ji-Won, Jae-Ho Shin, Gyu-Seong Shim, Kyeng-Bo Sim, Seong-Wook Jang, and Hyun-Joong Kim. "Mechanical Strength Enhancement of Polylactic Acid Hybrid Composites." Polymers 11, no. 2 (February 17, 2019): 349. http://dx.doi.org/10.3390/polym11020349.

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In recent years, there has been an increasing need for materials that are environmentally friendly and have functional properties. Polylactic acid (PLA) is a biomass-based polymer, which has attracted research attention as an eco-friendly material. Various studies have been conducted on functionality imparting and performance improvement to extend the field of application of PLA. Particularly, research on natural fiber-reinforced composites have been conducted to simultaneously improve their environmental friendliness and mechanical strength. Research interest in hybrid composites using two or more fillers to realize multiple functions are also increasing. Phase change materials (PCMs) absorb and emit energy through phase transition and can be used as a micro encapsulated structure. In this study, we fabricated hybrid composites using microcapsulated PCM (MPCM) and the natural fibrous filler, kenaf. We aimed to fabricate a composite material with improved endothermic characteristics, mechanical performance, and environmental friendliness. We analyzed the endothermic properties of MPCM and the structural characteristics of two fillers and finally produced an eco-friendly composite material. The PCM and kenaf contents were varied to observe changes in the performance of the hybrid composites. The endothermic properties were determined through differential scanning calorimetry, whereas changes in the physical properties of the hybrid composite were determined by measuring the mechanical properties.
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Bhoi, Krishnamayee, Smaranika Dash, Sita Dugu, Dhiren K. Pradhan, Anil K. Singh, Prakash N. Vishwakarma, Ram S. Katiyar, and Dillip K. Pradhan. "Investigation of the Phase Transitions and Magneto-Electric Response in the 0.9(PbFe0.5Nb0.5)O3-0.1Co0.6Zn0.4Fe1.7Mn0.3O4 Particulate Composite." Journal of Composites Science 5, no. 7 (June 24, 2021): 165. http://dx.doi.org/10.3390/jcs5070165.

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Multiferroic composites with enhanced magneto-electric coefficient are suitable candidates for various multifunctional devices. Here, we chose a particulate composite, which is the combination of multiferroic (PbFe0.5Nb0.5O3, PFN) as matrix and magnetostrictive (Co0.6Zn0.4Fe1.7Mn0.3O4, CZFMO) material as the dispersive phase. The X-ray diffraction analysis confirmed the formation of the composite having both perovskite PFN and magnetostrictive CZFMO phases. The scanning electron micrograph (SEM) showed dispersion of the CZFMO phase in the matrix of the PFN phase. The temperature-dependent magnetization curves suggested the transition arising due to PFN and CZFMO phase. The temperature-dependent dielectric study revealed a second-order ferroelectric to the paraelectric phase transition of the PFN phase in the composite with a small change in the transition temperature as compared to pure PFN. The magnetocapacitance (MC%) and magnetoimpedance (MI%) values (obtained from the magneto-dielectric study at room temperature (RT)) at 10 kHz were found to be 0.18% and 0.17% respectively. The intrinsic magneto-electric coupling value for this composite was calculated to be 0.14 mVcm−1Oe−1, which is comparable to other typical multiferroic composites in bulk form. The composite PFN-CZFMO exhibited a converse magneto-electric effect with a change in remanent magnetization value of −58.34% after electrical poling of the material. The obtained outcomes from the present study may be utilized in the understanding and development of new technologies of this composite for spintronics applications.
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Ayyasamy, Leema, Anbarasu Mohan, Lawrence Rex, Vidhya Sivakumar, Sivalinga Dhanasingh, and Paulsamy Sivasamy. "Enhanced thermal characteristics of CuO embedded lauric acid phase change material." Thermal Science 26, no. 2 Part B (2022): 1615–21. http://dx.doi.org/10.2298/tsci210930019l.

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A new composite Phase change material (PCM) was fabricated by adding 0.05, 0.1, 0.15, 0.2 wt% CuO nanoparticles (NPs) into lauric acid, separately. Scanning electron microscopy (SEM) was used to observe the morphological structures of as-prepared nanoparticles, and XRD analysis was used to characterize their crystalline structure. The phase change properties (phase change temperatures and latent heats) of lauric acid and composite PCMs were obtained using differential scanning calorimetry (DSC). Using a laser flash analyzer (LFA), the thermal conductivity enhancement of the composite PCMs was evaluated. The thermal reliability analysis was implemented to ascertain the results of the composite PCMs over long periods.
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35

Shi, Qi Song, and Kui Long Liu. "Preparation and Performance of Myristic Acid/Silicon Dioxide Composites as Thermal Energy Storage Materials." Advanced Materials Research 602-604 (December 2012): 1086–89. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.1086.

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The myristic acid/silicon dioxide composite materials were prepared by sol-gel methods. The myristic acid was used as the phase change material for thermal energy storage, with the SiO2 acting as the supporting material. The structural analysis of these form-stable myristic acid /SiO2 composite phase change materials was carried out using Fourier transformation infrared spectroscope (FT-IR).The microstructure of the form-stable composite phase change materials was observed by a scanning electronic microscope (SEM). The thermal properties was investigated by a differential scanning calorimeter (DSC).The SEM results showed that the myristic acid was well dispersed in the porous network of SiO2. And the new nanocomposite material has favorable thermal storage capacity and can be applied to solar energy storage, industrial waste heat, recovery of waste heat and as civilian structural materials.
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Ren, Xue Tan, Ling Ke Zeng, Ping An Liu, and Hui Wang. "Thermal Energy Storage System of Sulfate / Fiber Matrix Composite." Key Engineering Materials 368-372 (February 2008): 1077–79. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1077.

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The K2SO4-Na2SO4 system was studied by differential scanning calorimetry (DSC) with the aim of developing a new phase-change thermal energy storage material. The temperature range of phase change is from 800°C to 1069°C according to the phase diagram. A new shape-stabilized phase-change material made of molten salts impregnated by capillary forces in a porous-fiber matrix was presented. These materials were characterized by X-ray diffraction analysis and differential scanning calorimetry analysis. The results indicated that the compound included 70~80% of molten salts, meanwhile the heat storage material could keep its shape without any leakage during the heating process.
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37

Tang, Bingtao, Lingjuan Wang, Yuanji Xu, Jinghai Xiu, and Shufen Zhang. "Hexadecanol/phase change polyurethane composite as form-stable phase change material for thermal energy storage." Solar Energy Materials and Solar Cells 144 (January 2016): 1–6. http://dx.doi.org/10.1016/j.solmat.2015.08.012.

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38

Li, Hai Jian, Zhi Jiang Ji, Zhi Jun Xin, and Jing Wang. "Preparation of Phase Change Building Materials." Advanced Materials Research 96 (January 2010): 161–64. http://dx.doi.org/10.4028/www.scientific.net/amr.96.161.

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The types and characteristics of phase change materials were discussed. With respect to application in building materials, the PCM should have more attractive properties including high latent heat values, stability and proper melting point, inflammability, corrosiveness and supercooling. Phase change building material (PCBM) was prepared using vacuum absorption method and tested by means of Differential Scanning Calorimetry(DSC) and Scanning Electron Microscopy(SEM). The testing results have shown that organic PCM was absorbed into the holes of inorganic carriers completely and distributed evenly with stable performances. It is concluded that the composite PCM has steady temperature-adjusting function and the preparation means is acceptable.
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39

Sathiyaraj., R., R. Rakesh., N. Mithran., and M. Venkatesan. "Enhancement of heat transfer in phase change material using graphite-paraffin composites." MATEC Web of Conferences 172 (2018): 02001. http://dx.doi.org/10.1051/matecconf/201817202001.

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Phase change materials (PCMs) are energy storage materials which can be used for maintaining a controlled thermal environment for various applications in earth and space. PCMs are used in advanced technologies in aerospace cooling applications like heat exchangers and heat pipes for re-entry vehicles and spacecraft. Paraffin is a phase change material (PCM) commonly used for energy storage-related applications. Paraffin wax exhibits slow thermal response due to low thermal conductivity value (~0.2 W/m K for most paraffin waxes). In the present work, an attempt is made to fabricate a composite PCM using graphite powder. Such a composite material has enhanced thermal conductivity along with reduced melting period which are desirable properties of a PCM during solid to liquid phase change process. The reduction in melting period is indicated by the difference in change in temperature measured by the thermocouples during a specified time. The temperature variation and solid-liquid interface formation during the melting process are experimentally studied. The results showed that composite graphite powder with paraffin can improve the total phase transition time.
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40

Pan, Changyu, Ping He, and Enqi Shi. "Numerical simulation of thermal properties of cubic period metal foam embedded graphene-aerogel composite PCM." Journal of Physics: Conference Series 2383, no. 1 (December 1, 2022): 012128. http://dx.doi.org/10.1088/1742-6596/2383/1/012128.

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In the context of green and clean energy, latent heat energy storage by phase change materials is considered as one of the important energy technologies. In this paper, a new metal foam embedded graphene aerogel composite phase change material is developed, and pore-scale numerical simulations are performed in order to investigate the thermal properties of this composite phase change material. Among them, this paper designs copper foam with cubic periodic unit structure, which not only has high thermal conductivity, high porous structure and low relative density, but also can be rapidly fabricated by new fabrication techniques, while paraffin and erythritol are selected as PCM embedded in the metal foam. By analyzing the temperature-time and liquid phase-time relationship graphs, it is known that the new composite phase change material has more uniform internal temperature distribution and shorter melt condensation time compared to graphene-aerogel composite PCM, which provides a method for thermal management of PCMs.
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41

Leng, Bin Bin, Mei Zhu Chen, Shao Ping Zheng, and Shao Peng Wu. "Theoretical and Experimental Studies on Preparation of OMMT-Based Composite Phase Change Materials Used in Asphalt Pavement." Key Engineering Materials 599 (February 2014): 355–60. http://dx.doi.org/10.4028/www.scientific.net/kem.599.355.

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With the global warming, phase change materials are being expected to be applied in asphalt pavement to help lower its surface temperature. In this study, a kind of composite phase change material was prepared and its technique parameters were optimized through theoretical analysis and experimental study. A solid-liquid phase change material, with melt point of 43°C and phase transition heat of 161.6J/g, was used as core. The organophilic montmorillonite (OMMT) was used as a carrier and can prevent leakage of the melted phase change materials. The results showed that the ratio of OMMT to lauric acid was 2.6:1, and the melting temperature and time were 74°Cand 1.5hours, respectively. The composite phase change material prepared in this study had the phase transition latent heat of 36.168J/g and the transition temperature of 40.094°C. And the experimental results are in good agreement with theoretical analysis.
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42

Li, Mingli, Na Gong, Jinhui Wang, and Zhibin Lin. "Phase Change Material for Thermal Management in 3D Integrated Circuits Packaging." International Symposium on Microelectronics 2015, no. 1 (October 1, 2015): 000649–53. http://dx.doi.org/10.4071/isom-2015-tha44.

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Effective thermal control and management in three-dimensional electronic packaging are desirable to ensure the heat generated in integrated circuits can be dissipated. Conventional base materials in electronics from substrate to protective layers, due to low coefficient of thermal conductivity, cannot help to cool down the circuits, while such elevated temperature could highly impact the performance of the chips. In this study, phase change material (PCM) is selected for potential applications in thermal management of electronic packaging due to its isothermal nature and high thermal storage capability. PCM based composite is developed through the impregnation technology using highly porous expanded graphite. Heat transfer test results reveal that the PCM based composite displays superior heat storage capacity, while maintaining the favorable feature of thermal and chemical stabilization for electronic applications. Toward the end, the concept of implementation of PCM based composite is proposed in thermal control of 3D integrated circuits. It is expected the proposed composite will improve heat dissipation, and ultimately enhance the performance of the chips.
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43

Giriswamy. B. G et al.,, Giriswamy B. G. et al ,. "Experimental Study and Thermal Characterization of Phase Change Composite Material." International Journal of Mechanical and Production Engineering Research and Development 8, no. 4 (2018): 315–24. http://dx.doi.org/10.24247/ijmperdaug201833.

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44

Li-guang, XIAO, and WANG Jing-wei. "Preparation and Research on Expanded Perlite Composite Phase Change Material." Journal of Physics: Conference Series 1676 (November 2020): 012020. http://dx.doi.org/10.1088/1742-6596/1676/1/012020.

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45

Hu, Jinyan, Run Hu, Yongming Zhu, and Xiaobing Luo. "Experimental Investigation on Composite Phase-Change Material (CPCM)-Based Substrate." Heat Transfer Engineering 37, no. 3-4 (August 26, 2015): 351–58. http://dx.doi.org/10.1080/01457632.2015.1052712.

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46

Confalonieri, Chiara, Aldo Tommaso Grimaldi, and Elisabetta Gariboldi. "Ball-milled Al–Sn alloy as composite Phase Change Material." Materials Today Energy 17 (September 2020): 100456. http://dx.doi.org/10.1016/j.mtener.2020.100456.

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47

Li, Min, and Qiangang Guo. "The preparation of the hydrotalcite-based composite phase change material." Applied Energy 156 (October 2015): 207–12. http://dx.doi.org/10.1016/j.apenergy.2015.07.040.

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48

Zheng, Huanpei, Changhong Wang, Qingming Liu, Zhongxuan Tian, and Xianbo Fan. "Thermal performance of copper foam/paraffin composite phase change material." Energy Conversion and Management 157 (February 2018): 372–81. http://dx.doi.org/10.1016/j.enconman.2017.12.023.

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49

Song, Xiange. "Thermal analysis of metal foam matrix composite phase change material." Journal of Thermal Science 24, no. 4 (June 2015): 386–90. http://dx.doi.org/10.1007/s11630-015-0799-6.

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50

Eid, Salam, Chawki Lahoud, Marwan Brouche, Mohamed Hmadi, and Christy Lahoud. "Modeling and Validation of the Enthalpy-Temperature Curve for Phase Change Materials." Materials Science Forum 1050 (January 18, 2022): 149–59. http://dx.doi.org/10.4028/www.scientific.net/msf.1050.149.

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Thermo-dynamical studies have proven that introducing phase change materials (PCM) to the building’s envelope could decrease the heat transfer exchange rate and maintain the inside thermal comfort for long periods. Among all types of PCM applications in the building’s envelope, the cement-plaster is the most cost-effective. The composite PCM-plaster material was formed by mixing predefined mass percentages of PCM microcapsules with local cement, sand, and water. This paper aims to establish a direct solution for the enthalpy-temperature variations for the PCM composite material. This solution will enable to study the effect of the composite material on buildings' energy loads. The obtained model has been also validated against experimentally tested samples and results were in complete agreement. This model will enable researchers to obtain the correct heat response when the envelope of the building is subjected to different external weather solicitations.
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