Experimental and numerical study of shape-stable phase-change nanocomposite toward energy-efficient building constructions

Sayyar, Mohammad; Weerasiri, R. R.; Soroushian, Parviz; Lu, Jue

doi:10.1016/j.enbuild.2014.02.018

Cited by 95 publications

(36 citation statements)

References 23 publications

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“…Thermal response of gypsum with PCM has been extensively studied during the past years [5][6][7][8][9][10][11][12][13], experimentally or by using numerical models, and successful results were achieved. Nevertheless, physical and mechanical characterization is also important [14,15] in order to evaluate the PCM homogeneity, the porosity of the material, and the variation of compressive and flexural strength, among others.…”

Section: Introductionmentioning

confidence: 98%

Use of multi-layered PCM gypsums to improve fire response. Physical, thermal and mechanical characterization

Serrano

Barreneche

Navarro

et al. 2016

Energy and Buildings

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The building sector is one of the highest energy consumers representing around 30% of total energy use. One of the recommendations of the IEA (International Energy Agency) to reduce energy consumption in buildings is to enhance the thermal performance of building envelopes. In the present study, PCM (Phase Change Material) gypsum materials have been manufactured using three different PCM inclusion methods and a thin layer of gypsum without PCM is added as external layer with the aim of improving the fire reaction behaviour. By performing a detailed physical, mechanical and thermal characterization, the suitability of the materials to be implemented in the building envelope as inner coating is demonstrated. Results show that also the thermal properties are improved in the three cases by the addition of PCM. Moreover, the negative effect of adding paraffin wax PCM into gypsum against flame can be easily reduced by the addition of a thin gypsum layer, which is a low tech and cheap solution without extra environmental impact.Peer ReviewedPreprin

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Section: Introductionmentioning

confidence: 98%

Use of multi-layered PCM gypsums to improve fire response. Physical, thermal and mechanical characterization

Serrano

Barreneche

Navarro

et al. 2016

Energy and Buildings

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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

161

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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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“…Commercial gypsum boards are widely used in the building industry as facing materials for walls and ceilings. Thermal response of gypsum materials has been experimentally and numerically studied during the past years [1][2][3][4][5][6][7][8][9][10][11]. Materials based on gypsum are known for excellent properties in fire protection and are used as general materials to protect building structures against fire.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of heat transfer problem for layered gypsum products exposed to fire

Aboltins

Kalis

Pulkis

et al. 2018

Engineering for Rural Development

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Abstract. The problem of heat transfer through layered material of gypsum board products exposed to fire is studied in the paper. This paper proposes a thermal nonlinear conductivity model in different gypsum product layers for foam gypsum plate (density 300kg·m -3 ) and gypsum board (density 1000 kg·m -3 )with high temperatures. The specific heat and thermal conductivity coefficients depend on temperature. These types of connection are obtained using approximation by cubic splines. The 1-D nonlinearparabolic type partial differential equation (PDE), expressing the rate of the change of temperature in every layer, is derived for heat transfer. The approximation and calculation of corresponding initial boundary value problem is based on the Matlab solver "pdepe". The results of calculations are presented for one, two and three layered environment. The results of calculations are compared with the experiments at the Faculty of Environment and Civil Engineering of the Latvia University of Life Sciences and Technologies.

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Experimental and numerical study of shape-stable phase-change nanocomposite toward energy-efficient building constructions

Cited by 95 publications

References 23 publications

Use of multi-layered PCM gypsums to improve fire response. Physical, thermal and mechanical characterization

Use of multi-layered PCM gypsums to improve fire response. Physical, thermal and mechanical characterization

Nano-enhanced phase change materials for improved building performance

Numerical simulation of heat transfer problem for layered gypsum products exposed to fire

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