Experimental and numerical study on thermal energy storage of polyethylene glycol/expanded graphite composite phase change material

Lv, Yajun; Zhou, Weibing; Jin, Weizhun

doi:10.1016/j.enbuild.2015.11.042

Cited by 69 publications

(21 citation statements)

References 28 publications

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“…Such manufacturing methods have the characteristic that the molten PCM is absorbed into the host material’s porous structure. A vacuum impregnation method is an excellent alternative to have the most significant amount of molten PCM absorbed in the porous structure and the sol-gel process is a technique for fabricating both organic and inorganic shape-stabilized PCMs [ 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Energy Storage by the Encapsulation of Phase Change Materials in Building Elements—A Review

et al. 2021

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The energy sector is one of the fields of interest for different nations around the world. Due to the current fossil fuel crisis, the scientific community develops new energy-saving experiences to address this concern. Buildings are one of the elements of higher energy consumption, so the generation of knowledge and technological development may offer solutions to this energy demand, which are more than welcome. Phase change materials (PCMs) included in building elements such as wall panels, blocks, panels or coatings, for heating and cooling applications have been shown, when heating, to increase the heat storage capacity by absorbing heat as latent heat. Therefore, the use of latent heat storage systems using phase change materials (PCMs) has been investigated within the last two decades. In the present review, the macro and micro encapsulation methods for construction materials are reviewed, the former being the most viable method of inclusion of PCMs in construction elements. In addition, based on the analysis of the existing papers on the encapsulation process of PCMs, the importance to pay more attention to the bio-based PCMs is shown, since more research is needed to process such PCMs. To determine its thermophysical and mechanical behavior at the micro and macro levels, in order to see the feasibility of substituting petroleum-based PCMs with a more environmentally friendly bio-based one, a section devoted to the excellent PCM with lightweight aggregate (PCM-LWA concrete) is presented due to the lack of description given in other reviews.

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Section: Introductionmentioning

confidence: 99%

Thermal Energy Storage by the Encapsulation of Phase Change Materials in Building Elements—A Review

et al. 2021

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“…Nas últimas décadas, foram realizados vários trabalhos de investigação relacionados com a incorporação de PCM em produtos de construção, a reutilização de cinzas volantes e o impacto de altas temperaturas em materiais cimentícios (argamassas e concretos) [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Contudo, o comportamento a baixas e elevadas temperaturas de argamassas cimentícias com incorporação direta de PCM não encapsulado e cinzas volantes ainda não foi estudado.…”

Section: Introductionunclassified

Argamassas com incorporação direta de Materiais de Mudança de Fase: Avaliação do comportamento a baixas e elevadas temperaturas

2021

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RESUMO Atualmente, é necessário estudar soluções construtivas com bom comportamento a baixas e elevadas temperaturas, ou seja que as argamassas não percam totalmente a sua resistência quando sujeitas a temperaturas diferentes e mais exigentes do que as temperaturas de operação. No que diz respeito ao conhecimento das capacidades de armazenamento térmico dos materiais de mudança de fase (PCM), foram desenvolvidas quatro composições distintas baseadas em cimento e cinzas volantes, nas quais foram incorporados diretamente diferentes teores de PCM não encapsulado (0%, 5%, 10% e 20%). Estas composições foram testadas a baixas e elevadas temperaturas (-18ºC, 20ºC, 200ºC, 400ºC e 600ºC), através de ensaios de gelo-degelo e ensaios de compressão e flexão. Foi possível concluir que a incorporação de PCM não encapsulado originou uma melhoria do comportamento a baixas temperaturas, mantendo um comportamento idêntico ao das argamassas de referência quando submetidas a elevadas temperaturas.

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“…e addition of copper foam increases the internal heat transfer of the paraffin and reduces the energy storage time by more than 40%. Lv et al [27] added EG to polyethylene glycol, and the results showed that the addition of EG greatly improved the thermal conductivity and heat transfer of the PCM. Jiang et al [28] added CF to paraffin, and the results show that the thermal conductivity of the composite is almost linear with the volume fraction of carbon fiber.…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Performance of Phase‐Change Materials via 3D Printing with Prickly Aluminum Honeycomb for Thermal Management of Ternary Lithium Batteries

Cao

Huang

Liu

2020

Advances in Materials Science and Engineering

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This study introduces a new type of lightweight, shape-stable composite phase-change material (CPCM) to improve the thermal management of ternary lithium batteries. Paraffin wax (PW) was used as a phase-change material, expanded graphite (EG) and high-density polyethylene (HDPE) were used as support materials, carbon fiber (CF) was used as a heat-conductive additive, and a 3D printed aluminum honeycomb with a prickly structure (3D Al-Hc) was added to enhance the mechanical properties and thermal conductivity of the CPCM. The properties of the CPCM were analyzed based on its microstructure, thermal properties, and stress-strain response. The CPCM was applied to a battery cooling module to determine the temperature response of a battery. The results showed that when the CF mass fraction was 4.5 wt%, the degree of supercooling in the PW/EG/CF/HDPE was reduced by 51.5% and 43.3% compared to PW PCM and PW/EG CPCM, respectively. In addition, the thermal conductivity of the PW/EG/CF/HDPE/3D AL-Hc CPCM (5.723 W/(m·K)) was 1.9 times that of the PW/EG. Due to the presence of the 3D AL-Hc, the CPCM has a strain of 1.25 mm at a pressure of 100 KPa. In addition, the CPCM has excellent battery thermal management performance. At a 2.5°C discharge rate, the operating temperature of the battery is kept within the safe temperature range of 50°C.

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Experimental and numerical study on thermal energy storage of polyethylene glycol/expanded graphite composite phase change material

Cited by 69 publications

References 28 publications

Thermal Energy Storage by the Encapsulation of Phase Change Materials in Building Elements—A Review

Thermal Energy Storage by the Encapsulation of Phase Change Materials in Building Elements—A Review

Argamassas com incorporação direta de Materiais de Mudança de Fase: Avaliação do comportamento a baixas e elevadas temperaturas

The Enhanced Performance of Phase‐Change Materials via 3D Printing with Prickly Aluminum Honeycomb for Thermal Management of Ternary Lithium Batteries

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