Shape-stabilized phase change materials based on porous supports for thermal energy storage applications

Huang, Xiubing; Chen, Xiao; Li, Ang; Atinafu, Dimberu G.; Gao, Hongyi; Dong, Wenjun; Wang, Ge

doi:10.1016/j.cej.2018.09.013

Cited by 536 publications

(191 citation statements)

References 257 publications

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“…The poor shape stability during phase transition of organic PCMs is one of the most difficult problems associated with their practical applications . Therefore, it is necessary to test the leak resistance of composite materials.…”

Section: Resultsmentioning

confidence: 99%

Thermally Conductive and Shape‐Stabilized Polyethylene Glycol/Carbon Foam Phase‐Change Composites for Thermal Energy Storage

et al. 2020

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Phase‐change materials (PCMs) have been widely investigated as candidates for thermal energy storage and solar thermal energy conversion. However, low thermal conductivity and poor shape stability during phase transition processes are detrimental to their practical applications. In this study, we designed composite PCMs based on carbon foam (CF) via the vacuum impregnation method to overcome these problems. CF with 3D interconnected microporous structures and good compressive strength was fabricated from phenolic resin (PF) using a combined process of carbonization and sacrificial template techniques. The developer material is considered a promising support material for PCMs. The as‐prepared polyethylene glycol/CF composite (PCC) exhibited a high energy‐storage density with a melting enthalpy of 135.7 J/g, and the thermal conductivity was enhanced by 109.8% compared to that of pure polyethylene glycol. In addition, the PCC showed excellent thermal stability and leakage‐proof performance after 100 heating/cooling cycles and good compressive strength. Because of the simple preparation process and low cost, PCC is a promising material for various thermal energy storage applications, especially in building energy storage systems.

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Section: Resultsmentioning

confidence: 99%

Thermally Conductive and Shape‐Stabilized Polyethylene Glycol/Carbon Foam Phase‐Change Composites for Thermal Energy Storage

et al. 2020

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“…da Cunha and Eames reported that the melting temperature of a compact latent heat storage system using paraffin wax as a PCM was reduced from 53°C to 40°C. Wang etal examined thermal management using PEG as PCM and found that the melting temperature reached 61.5°C.…”

Section: Resultsmentioning

confidence: 99%

Enhanced thermal conductivity of copper‐doped polyethylene glycol/urchin‐like porous titanium dioxide phase change materials for thermal energy storage

et al. 2019

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Summary A composite phase change material (PCM) of copper‐doped polyethylene glycol (PEG) 2000 impregnated urchin‐like porous titanium dioxide (TiO2) microspheres (PEG/TiO2) was successfully synthesised. The urchin‐like porous TiO2 structures contain hollow cavities that can provide a high PEG loading capacity of up to 80 wt%. Copper nanoparticles were uniformly dispersed on the outer and inner surfaces of the 0.8PEG/TiO2 as additives to enhance the thermal conductivity of the composite PCM. The latent heat of the Cu/PEG/TiO2 porous composite PCM reached 133.8 J/g, and the thermal conductivity was 0.58 W/(mK), which was 152.2% higher than that of TiO2 and 38.1% higher than 0.8PEG/TiO2. Moreover, the Cu/PEG/TiO2 porous composite PCM has excellent thermal stability and reliability.

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“…A new type of nano‐structured calcium silicate (NCS) has also been developed as a framework material to obtain NCS‐based phase change composites to provide effective heat storage and release . Metal foams, graphene aerogels, porous minerals, expanded graphite, diatomite, metallic porous material and mesoporous silica have also been developed as framework materials for assembling composite phase change materials . Through the analysis of published literatures, synthetic polymers and porous materials with different structures have been used as framework materials to obtain shape‐stable PCMs, while few studies have used natural biomass materials as framework materials.…”

Section: Introductionmentioning

confidence: 99%

Lignin‐retaining porous bamboo‐based reversible thermochromic phase change energy storage composite material

2020

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Shaped-stabilized reversible thermochromic phase change materials of (TBC-LB, TBB-LB) were assembled by impregnation the TBC (crystal violet lactone/ bisphenol A/tetradecanol) or TBB (3,3 0 -Bis (1-n-octyl-2-methylindol-3-yl) phthalide/bisphenol A/tetradecanol) into lignin-retained bamboo (LB) for energy storage. Analysis of the chemical structure of lignin-retained wood showed that the removal of part of lignin from the bamboo contributes to the penetration of the compound, and the partial retention of lignin is advantageous for maintaining high mechanical properties. The SEM micrographs of TBC-LB and TBB-LB indicate that TBC and TBB are well immersed into the porous LB. The TBC-LB showed an endothermic peak at 40.8 C with ΔH m of 113.3 J g −1 and two exothermic peaks at 28.8 C and 21.9 C with ΔH L+S of 110.2 J g −1 , and the value is basically equal to the pure TBC compound, indicating that TBC has been fully immersed in LB to form a composite phase change material. For phase change latent heat and melting-cooling temperature, TBB-LB and TBC-LB showed the same trend. About 100 heating-cooling cycles were performed to evaluate the reliability of TBC-LB and TBB-LB, showing excellent cycle stability. It is foreseen that the prepared shape-stable TBC-LB and TBB-LB have great potential for applying insulation systems in reversible thermochromic phase change energy storage. K E Y W O R D S composite, lignin-retained bamboo, phase change, properties, reversible thermochromic compound

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Shape-stabilized phase change materials based on porous supports for thermal energy storage applications

Cited by 536 publications

References 257 publications

Thermally Conductive and Shape‐Stabilized Polyethylene Glycol/Carbon Foam Phase‐Change Composites for Thermal Energy Storage

Thermally Conductive and Shape‐Stabilized Polyethylene Glycol/Carbon Foam Phase‐Change Composites for Thermal Energy Storage

Enhanced thermal conductivity of copper‐doped polyethylene glycol/urchin‐like porous titanium dioxide phase change materials for thermal energy storage

Lignin‐retaining porous bamboo‐based reversible thermochromic phase change energy storage composite material

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