Combined experimental and numerical evaluation of a prototype nano-PCM enhanced wallboard

Biswas, Kaushik; Lu, Jue; Soroushian, Parviz; Shrestha, Som

doi:10.1016/j.apenergy.2014.02.047

Cited by 195 publications

(54 citation statements)

References 21 publications

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“…Sayyar et al [96] and Biswas et al [97] reported on the use of a nano-enhanced PCM with fatty acids and graphite interconnected nanosheets for energy efficient building constructions. The weight fraction of graphite considered was 8.0%.…”

Section: Application Of Nano-enhanced Pcms In Buildingsmentioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

149

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Nano-enhanced phase change materials (PCMs) have attracted increasing attention to address one of the key barriers (i.e. low thermal conductivity) to the wide adoption of PCMs in many industrial applications. This paper discusses the generic problem and key issues associated with appropriately using this new class of materials in buildings for effective thermal management and improved energy performance. An overview on major recent development and application of nano-enhanced PCMs as thermal energy storage media is provided. A case study based on a PCM ceiling ventilation system integrated with solar photovoltaic thermal (PVT) collectors is then performed to evaluate the potential benefits due to the dispersion of copper nanoparticles into the PCM base fluid of RT24. The results showed that this nano-enhanced PCM has higher melting and solidification rates than that of the pure PCM. Compared to the use of the pure PCM, 8.3% more heat was charged in and 25.1% more heat was discharged from the nano-enhanced PCM under the three winter test days. More research is needed to understand the fundamental mechanisms behind the PCM thermal conductivity enhancement through the dispersion of nanometer-sized materials and to investigate how these mechanisms drive building performance enhancement. Abstract: Nano-enhanced phase change materials (PCMs) have attracted increasing attention to address one of the key barriers (i.e. low thermal conductivity) to the wide adoption of PCMs in many industrial applications. This paper discusses the generic problem and key issues associated with appropriately using this new class of materials in buildings for effective thermal management and improved energy performance. An overview on major recent development and application of nano-enhanced PCMs as thermal energy storage media is provided. A case study based on a PCM ceiling ventilation system integrated with solar photovoltaic thermal (PVT) collectors is then performed to evaluate the potential benefits due to the dispersion of copper nanoparticles into the PCM base fluid of RT24. The results showed that this nano-enhanced PCM has higher melting and solidification rates than that of the pure PCM. Compared to the use of the pure PCM, 8.3% more heat was charged in and 25.1% more heat was discharged from the nano-enhanced PCM under the three winter test days. More research is needed to understand the fundamental mechanisms behind the PCM thermal conductivity enhancement through the dispersion of nanometer-sized materials and to investigate how these mechanisms drive building performance enhancement.

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Section: Application Of Nano-enhanced Pcms In Buildingsmentioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

149

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“…Finally, a design rule was proposed to design the EPCM‐mortar composites, which found useful in the built environment and high performance composites. The other possibilities of using EPCMs are with building structures through wall boards, gypsum plaster, sandwich panels, and slabs, which could lead to reduce the energy demand in both residential and commercial building sectors.…”

Section: Application Of Micro‐/nano‐pcmsmentioning

confidence: 99%

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

et al. 2019

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Summary With advancement in technology—nanotechnology, various thermal energy storage (TES) materials have been invented and modified with promising thermal transport properties. Solid‐liquid phase change materials (PCMs) have been extensively used as TES materials for various energy applications due to their highly favourable thermal properties. The class of PCMs, organic phase change materials (OPCMs), has more potential and advantages over inorganic phase change materials (IPCMs), having high phase change enthalpy. However, OPCMs possess low thermal conductivity as well as density and suffer leakage during the melting phase. The encapsulation technologies (ie, micro and nano) of PCMs, with organic and inorganic materials, have a tendency to enhance the thermal conductivity, effective heat transfer, and leakage issues as TES materials. The encapsulation of PCMs involves several technologies to develop at both micro and nano levels, called micro‐encapsulated PCMs (micro‐PCM) and nano‐encapsulated PCMs (nano‐PCM), respectively. This study covers a wide range of preparation methods, thermal and morphological characteristics, stability, applications, and future perspective of micro‐/nano‐PCMs as TES materials. The potential applications, such as solar‐to‐thermal and electrical‐to‐thermal conversions, thermal management, building, textile, foam, medical industry of micro‐ and nano‐PCMs, are reviewed critically. Finally, this review paper highlights the emerging future research paths of micro‐/nano‐PCMs for thermal energy storage.

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“…For instance, not only can they be mixed with concrete, but micro‐PCMs can also be incorporated with other materials, such as polyurethane foams or gypsum, to enhance the thermal insulation property of these wallboards . Biswas et al . prepared 1.3‐cm‐thick nano‐PCM wallboard containing 20% by weight nano‐PCM homogeneously dispersed in gypsum board.…”

Section: Introductionmentioning

confidence: 99%

Investigations on thermal properties of microencapsulated phase‐change materials with different acrylate‐based copolymer shells as thermal insulation materials

Yan

Xie

Wang

2019

J of Applied Polymer Sci

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A series of microencapsulated phase‐change materials (micro‐PCMs) with binary cores and acrylate‐based copolymer shells were prepared. The micro‐PCMs contained octadecane and butyl stearate as binary‐core materials. Allyl methacrylate, ethylene glycol dimethacrylate, 1,4‐butanediol diacrylate (BDDA), and 1,6‐hexanediol dimethacrylate were respectively introduced to copolymerize with divinylbenzene (DVB) to form different microcapsule shells. In this work, the influence of the types of core and shell materials and core–shell weight ratios on the thermal properties of micro‐PCMs was studied. The chemical structures, morphologies, thermal properties, and thermal insulation properties of the wallboards were all tested and discussed. Scanning electron microscope photographs show that these micro‐PCMs have relatively spherical profiles and compact surfaces with diameters ranging from 10 to 80 μm. Differential scanning calorimetry results indicated that their microencapsulation efficiency ranged from 48 wt % to 80 wt %. A thermogravimetric analysis demonstrated that these micro‐PCMs can ensure their thermal stability below 210°C. Finally, a thermal insulation wallboard fabricated with synthesized P(BDDA‐co‐DVB) micro‐PCMs showed excellent thermal energy storage performance, keeping the temperature fluctuation within 2.5°C. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47777.

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Combined experimental and numerical evaluation of a prototype nano-PCM enhanced wallboard

Cited by 195 publications

References 21 publications

Nano-enhanced phase change materials for improved building performance

Nano-enhanced phase change materials for improved building performance

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

Investigations on thermal properties of microencapsulated phase‐change materials with different acrylate‐based copolymer shells as thermal insulation materials

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