Numerical and experimental research of cold storage for a novel expanded perlite-based shape-stabilized phase change material wallboard used in building

Yao, Chengqiang; Kong, Xiangfei; Li, Yantong; Du, Yaxing; Qi, Chengying

doi:10.1016/j.enconman.2017.10.052

Cited by 144 publications

(31 citation statements)

References 45 publications

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“…The desirable chemical compatibility, heat storage and release properties, and thermal stability and reliability of PCE-CPCMs are beneficial to their practical applications. Based on previous research [18,19,20,21], PCE-CPCMs showed comparable properties to the reported composite PCMs, so they could be considered as a potential candidate in building-integrated solar energy conversion applications.…”

Section: Discussionmentioning

confidence: 76%

“…Based on previous research [18], a latent heat of at least 50 J/g was needed at an affordable cost for heat storage applications of composite PCMs, such as using a building-integrated solar thermal system. Yao et al [19] reported expanded perlite-based composite PCMs wallboard (melting: 27.60 °C and 67.13 J/g; solidification: 23.56 °C and 67.06 J/g), which effectively reduced the indoor temperature. Fu et al [20] prepared expanded perlite-based composite PCMs boards (87.44 J/g; 0.178 W/(m·K)), exhibiting good performance in increasing the thermal inertia and reducing the indoor temperature fluctuation.…”

Section: Introductionmentioning

confidence: 99%

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Polyethylene Glycol-Carbon Nanotubes/Expanded Vermiculite Form-Stable Composite Phase Change Materials: Simultaneously Enhanced Latent Heat and Heat Transfer

Deng

et al. 2018

Polymers

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Polyethylene glycol (PEG)-carbon nanotubes (CNTs) with expanded vermiculite (EVM) form-stable composite phase change materials (PCE-CPCMs) were constructed via the efficient synergistic effect between EVM and CNTs. The resultant material demonstrated simultaneously enhanced latent heat and heat transfer. The unique EVM pore structure and CNTs surfaces contributed to the form stability of PCE-CPCMs. The adsorption capacity was 77.75–81.54 wt %. The latent heat of the PCE-CPCMs increased with increasing CNTs content due to the decreasing inhibition effect of EVM and the increasing adsorption capacity of PEG, which was 83.9 J/g during melting and 104.2 J/g during solidification for PCE7.09. The pore confinement and surface EVM interactions inhibited the heat storage capacity of the PCE-CPCMs. Moreover, the inhibition effect on the heat storage capacity of PCE-CPCMs during the melting process was stronger than during solidification due to the crystallization-promoting effect. The heat transfer of PCE-CPCMs was significantly enhanced by the CNTs filler (0.5148 W/(m·K) for PCE7.09) due to the decrease in interfacial thermal resistance and the formation of rapid thermally conductive pathways. Fourier transform infrared spectroscopy, thermogravimetric analysis, and thermal cycles test results confirmed that the PCE-CPCMs exhibited excellent chemical compatibility, thermal stability, and reliability.

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Section: Discussionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Polyethylene Glycol-Carbon Nanotubes/Expanded Vermiculite Form-Stable Composite Phase Change Materials: Simultaneously Enhanced Latent Heat and Heat Transfer

Deng

et al. 2018

Polymers

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“…Hu and Argyropoulos (1996) [143] C e f f = [141,150] (for composite applications: i.e., cementitious ones) C e f f = X mort · C mort + X PCM · C PCM being X mort and X PCM mass fractions Yao et al (2018) [153] C e f f =…”

Section: Apparent Calorific Capacity Methods (Accm)mentioning

confidence: 99%

Reviewing Theoretical and Numerical Models for PCM-embedded Cementitious Composites

2018

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Accumulating solar and/or environmental heat in walls of apartment buildings or houses is a way to level-out daily temperature differences and significantly cut back on energy demands. A possible way to achieve this goal is by developing advanced composites that consist of porous cementitious materials with embedded phase change materials (PCMs) that have the potential to accumulate or liberate heat energy during a chemical phase change from liquid to solid, or vice versa. This paper aims to report the current state of art on numerical and theoretical approaches available in the scientific literature for modelling the thermal behavior and heat accumulation/liberation of PCMs employed in cement-based composites. The work focuses on reviewing numerical tools for modelling phase change problems while emphasizing the so-called Stefan problem, or particularly, on the numerical techniques available for solving it. In this research field, it is the fixed grid method that is the most commonly and practically applied approach. After this, a discussion on the modelling procedures available for schematizing cementitious composites with embedded PCMs is reported.

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“…Yao et al used paraffin with expanded perlite as supporting material to construct a phase change wallboard. The melting and solidification temperature obtained were 27.60°C and 23.56°C, respectively.…”

Section: Role Of Pcm In Buildings: a Short Reviewmentioning

confidence: 99%

Recapitulation on latent heat hybrid buildings

2019

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Summary In the existent paper, the performance of thermal storage hybrid buildings exploiting the latent heat of phase change materials (PCMs) for thermal refrigeration and heating of the contemporary period has been investigated. The conventional buildings consume a large amount of electricity, primarily for the heating and cooling applications. Electricity generation primarily relies on coal‐based thermal power plants. The emissions from these establishments pose a serious threat to the environment. Moreover, conventional heating/cooling units rely on exorbitant energy cost. The usage of any kind of thermal storage system is an efficacious way of stockpiling thermal energy and utilizing it when needed. This paper gives a comprehensive overview of the available thermal storage units incorporating PCMs. The various segments of the buildings, viz, ceiling, window, wall, and floor have been analyzed in details. The results are quite promising in terms of load reduction and overall energy saving. Indoor surface temperature reduction of up to 7oC has been achieved. The energy saving of up to 40% can be realized by employing PCM. A comprehensive list of the PCMs is also tried to build up for end users according to their temperature requirement.

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Numerical and experimental research of cold storage for a novel expanded perlite-based shape-stabilized phase change material wallboard used in building

Cited by 144 publications

References 45 publications

Polyethylene Glycol-Carbon Nanotubes/Expanded Vermiculite Form-Stable Composite Phase Change Materials: Simultaneously Enhanced Latent Heat and Heat Transfer

Polyethylene Glycol-Carbon Nanotubes/Expanded Vermiculite Form-Stable Composite Phase Change Materials: Simultaneously Enhanced Latent Heat and Heat Transfer

Reviewing Theoretical and Numerical Models for PCM-embedded Cementitious Composites

Recapitulation on latent heat hybrid buildings

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