Numerical investigations of unconstrained melting of nano-enhanced phase change material (NEPCM) inside a spherical container

Hosseinizadeh, S.F.; Darzi, A. Ali Rabienataj; Tan, F.L.

doi:10.1016/j.ijthermalsci.2011.08.006

Cited by 211 publications

(50 citation statements)

References 26 publications

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“…The results showed that a higher melting rate can be achieved by using the nano-enhanced PCMs as compared to that of using the PCM base fluids. The same conclusion was also obtained by Hosseinizadeh et al [88] through dispersing copper nanoparticles in RT27 from Rubitherm in a spherical container.…”

Section: Numerical and Experimental Investigation On Thermodynamic Besupporting

confidence: 85%

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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Section: Numerical and Experimental Investigation On Thermodynamic Besupporting

confidence: 85%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

161

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“…The example of commonly used methods include the dispersion of high conductivity particles in the PCM [14][15][16][17], embedding the PCM in the high conductivity porous medium [18][19][20][21][22][23][24] as well as inserting extended surfaces and fins [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of finned heat pipe-assisted thermal energy storage system with high temperature phase change material

Tiari

Qiu

Mahdavi

2015

Energy Conversion and Management

260

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“…Kashani et al [6] studied numerically the effects of surface waviness and nanoparticle dispersion on the solidification process of Cu-water nanofluid in an enclosure. The numerical study of unconstrained melting of NEPCM inside a spherical container using RT27 and copper nanoparticles was performed by Hosseinizadeh et al [7]. Rao et al [8] performed the Molecular dynamics (MD) simulations in order to assess the heat and mass transfer mechanisms of the nano-encapsulated and nanoparticle-enhanced PCM.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Melting of nanoparticles-enhanced phase change material (NEPCM) in vertical semicircle enclosure: numerical study

Jourabian

Farhadi

2015

J Mech Sci Technol

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Convection melting of ice as a Phase change material (PCM) dispersed with Cu nanoparticles, which is encapsulated in a semicircle enclosure is studied numerically. The enthalpy-based Lattice Boltzmann method (LBM) combined with a Double distribution function (DDF) model is used to solve the convection-diffusion equation. The increase in solid concentration of nanoparticles results in the enhancement of thermal conductivity of PCM and the decrease in the latent heat of fusion. By enhancing solid concentration of nanoparticles, the viscosity of nanofluid increases and convective heat transfer dwindles. For all Rayleigh numbers investigated in this study, the insertion of nanoparticles in PCM has no effect on the average Nusselt number.

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Numerical investigations of unconstrained melting of nano-enhanced phase change material (NEPCM) inside a spherical container

Cited by 211 publications

References 26 publications

Nano-enhanced phase change materials for improved building performance

Nano-enhanced phase change materials for improved building performance

Numerical study of finned heat pipe-assisted thermal energy storage system with high temperature phase change material

RETRACTED ARTICLE: Melting of nanoparticles-enhanced phase change material (NEPCM) in vertical semicircle enclosure: numerical study

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