Latent heat storage biocomposites of phase change material-biochar as feasible eco-friendly building materials

Jeon, Jisoo; Park, Ji Hun; Wi, Seunghwan; Yang, Sungwoong; Ok, Yong Sik; Kim, Sumin

doi:10.1016/j.envres.2019.01.058

Cited by 83 publications

(24 citation statements)

References 58 publications

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“…Furthermore, the latent heat capacities of melting of both bio‐chars prepared in this work were compared with those of different bio‐based carbons reported in literature (Table 2). 23,29,31‐34,41‐47 As can be seen evidently from the tabulated data, the LHTES properties of the composites are varied depending on the confinement rate and latent heat energy capacity of PCM. Accordingly, both CHW/CA and ACHW/CA composites have higher phase change enthalpies than that of many bio‐based carbon/PCM composites.…”

Section: Resultsmentioning

confidence: 97%

“…Yang et al 32 evaluated carbonized woods as a biological supporter material for lauric acid. Jeon et al 33 developed composite PCMs by vacuum impregnating bio based four different organic PCMs (palm oil, palm wax, coconut oil and coconut wax) into rice husk bio‐char. Dimberu et al 34 developed three kinds of bio‐char/n‐alkane and found that the bio‐char/octadecane had a higher LHTES capacity of 15.7% and 25.9% than that of the composites including dodecane and tetradecane, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Carbonized waste hazelnut wood‐based shape‐stable composite phase change materials for thermal management implementations

et al. 2021

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Summary Two kinds of new bio‐chars were produced from carbonization of waste hazelnut wood as low‐cost and eco‐friendly supporting matrices to simultaneously solve the seepage and low thermal conductivity problem of capric acid (CA) used as a phase change materials (PCM) for thermal management applications. In the prepared seepage‐free composites, the CA was impregnated by 52 and 64 wt% into porous structure of carbonized hazelnut wood (CHW) and activated carbonized hazelnut wood (ACHW), respectively. The SEM analysis exhibited that the CA was well confined by CHW and ACHW. FTIR and XRD investigations confirmed the existence of good chemical compatibility between CA and CHW/or ACHW. DSC results indicated that the seepage‐free CHW/CA and ACHW/CA composites have melting points of 28.5°C and 28.9°C, and melting enthalpies of 111.3 and 110.3 J/g, respectively. TG analyses revealed that the functioning temperatures of the composites were considerably lower than their thermal degradation temperatures. The LHTES properties and chemical structure of the composites was not altered throughout 1000‐cycling thermal test. The thermal conductivity of CHW/CA and ACHW/CA were 2.70 to 3.05 times higher than that of pure CA. The decrease in melting/solidification time of the composites proved the improvement in their thermal conductivities compared with pure CA. Consequently, the produced bio‐chars can be evaluated as supporter and thermal conductivity enhancer materials (TCEMs) for PCMs; besides, the fabricated composite PCMs can be considered as hopeful admixtures to fabricate of cost‐effective, eco‐friendly and energy‐efficient new types of mortar, concrete and plaster which can be used for thermal management implementations in buildings.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Carbonized waste hazelnut wood‐based shape‐stable composite phase change materials for thermal management implementations

et al. 2021

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“…Nevertheless, solar energy is timeliness and periodic, which are the main drawbacks of its use. Phase change material (PCM) with high latent heat can absorb solar energy and release heat to indoor environment through phase change . Previous studies have shown that adding paraffin provided a great benefit to the thermal performance of applications of glazed window, roof, wall, chimney, and other fields …”

Section: Introductionmentioning

confidence: 99%

“…Phase change material (PCM) with high latent heat can absorb solar energy and release heat to indoor environment through phase change. [20][21][22] Previous studies have shown that adding paraffin provided a great benefit to the thermal performance of applications of glazed window, [23][24][25][26][27][28][29] roof, [30][31][32] wall, 33,34 chimney, 35,36 and other fields. [37][38][39][40] Goia 23 demonstrated that adding PCM into glazed windows can utilize the solar energy effectively.…”

Section: Introductionmentioning

confidence: 99%

Seasonal thermal performance analysis of glazed window filled with paraffin including various nanoparticles

et al. 2020

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Summary A two‐dimensional heat transfer model was proposed to numerically investigate the effect of enriching phase change material (PCM) with different kinds of nanoparticles on thermal performance of glazing windows in different seasons of the year. The results were presented in terms of liquid fraction of PCM, inner surface temperature and temperature difference between interior and exterior surfaces of glass window, and their occurrence times. The results showed that adding nanoparticles into PCM can promote the melting and solidification processes, extend the total time of PCM being in the liquid state, and raise the internal surface temperature of glass. However, in summer season, the internal surface temperature decreases and the total melting time respectively reduces by 7 and 1.5 minutes by introducing TiO2 and ZnO nanoparticles into PCM. Furthermore, the introduced nanoparticles do not have the same effect on the thermal performance of the window unit. While the inner surface temperature decreases by 0.82 K in summer by addition of TiO2 to PCM, it increases by 0.84 K in transition season and 0.89 K in winter season by utilizing ZnO nanoparticles. Although the nano‐PCM remains in the solid state in winter, the existence of nanoparticles can still increase the inner surface temperature.

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“…Biochar is a carbon-rich material that could be produced from a variety of organic waste materials such as agricultural waste and municipal sewage sludge by pyrolysis of biomass under anoxic or anaerobic conditions. Biochar is receiving more and more attention due to its unique characteristics such as high carbon content, large specific surface area and stable structure 13,14 . Wu et al 15 utilized biochar as a soil improvement agent to increase the available phosphorus content in the saline-alkali soil and reduce the leaching of phosphorus in the soil.…”

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confidence: 99%

Silver microsphere doping porous-carbon inspired shape-stable phase change material with excellent thermal properties: preparation, optimization, and mechanism

Zhang

Chen

Nie

et al. 2020

Sci Rep

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In this study, silver microspheres (SMS) were introduced into cotton stalk porous-carbon (CSP) to prepare silver microsphere doping porous-carbon (SMS-CSP), and then SMS-CSP was used as the matrix of polyethylene glycol (PEG) to synthesize shape-stable phase change material of PEG/SMS-CSP. It was found that the introduction of SMS into CSP could not only greatly improve the loading capacity of the porous-carbon for PEG, but also could increase the thermal conductivity of PEG/SMS-CSP. Additionally, the method of introducing SMS into porous-carbon had the advantages of environmental protection and simple operation. Moreover, the raw material of cotton stalk is a kind of agricultural waste, which has the merits of wide source, low price and easy to obtain. Furthermore, in the preparation of cotton stalk porous-carbon, with the increase of pyrolysis temperature the thermal conductivity of PEG/SMS-CSP could be enhanced significantly. The mechanism about the enhancement of thermal conductivity was clarified, which could provide more basic theory for the study about the thermal conductivity of shape-stable phase change materials (ss-PCMs) based on porous-carbon.

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Latent heat storage biocomposites of phase change material-biochar as feasible eco-friendly building materials

Cited by 83 publications

References 58 publications

Carbonized waste hazelnut wood‐based shape‐stable composite phase change materials for thermal management implementations

Carbonized waste hazelnut wood‐based shape‐stable composite phase change materials for thermal management implementations

Seasonal thermal performance analysis of glazed window filled with paraffin including various nanoparticles

Silver microsphere doping porous-carbon inspired shape-stable phase change material with excellent thermal properties: preparation, optimization, and mechanism

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