Numerical heat transfer studies of a latent heat storage system containing nano-enhanced phase change material

Ranjbar, A.A.; Kashani, Sina; Hosseinizadeh, S.F.; Ghanbarpour, Morteza

doi:10.2298/tsci100412060r

Cited by 75 publications

(25 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ranjbar et al [84] investigated the effect of dispersing copper nanoparticles in water on the solid-liquid phase change interface by using an enthalpy-porosity numerical modelling method. It was concluded that the heat conduction was dominant in both solid and liquid phases.…”

Section: Numerical and Experimental Investigation On Thermodynamic Bementioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

169

View full text Add to dashboard Cite

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.

show abstract

Section: Numerical and Experimental Investigation On Thermodynamic Bementioning

confidence: 99%

Nano-enhanced phase change materials for improved building performance

Lin

Sohel

2016

Renewable and Sustainable Energy Reviews

169

View full text Add to dashboard Cite

show abstract

“…In addition, their numerical results showed reduction in the overall solidification time. Ranjbar et al [12] investigated the influence of utilizing nanoparticle on enhancement of heat transfer in a three-dimensional cavity. They showed that the suspended nanoparticles substantially increase the heat transfer rate.…”

Section: Journal Of Engineeringmentioning

confidence: 99%

Melting of Nanoprticle-Enhanced Phase Change Material inside Shell and Tube Heat Exchanger

Hosseini

Ranjbar

Sedighi

et al. 2013

Journal of Engineering

View full text Add to dashboard Cite

This paper presents a numerical study of melting of Nanoprticle-Enhanced phase change material (NEPCM) inside a shell and tube heat exchanger using RT50 and copper particles as base material and nanoparticle, respectively. In this study, the effects of nanoparticles dispersion ( = 0, 0.03, and 0.05) on melting time, liquid fraction, and penetration length are investigated. The results show that the melting time decreases to 14.6% and the penetration length increases to 146% with increasing volume fraction of nanoparticle up to = 0.05.

show abstract

“…To conquer this limitation, various heat transfer enhancement methods are investigated including employment PCM microencapsulation [22,23], using multiple array of PCMs [24,25], dispersing high thermal conductive materials [26,27] and using NePCMs [28,29]. Utilizing extended surfaces techniques has attracted a great amount of attention which includes fined tubes and multi-tubes.…”

Section: Introductionmentioning

confidence: 99%

Phase change in multi-tube heat exchangers

et al. 2016

Self Cite

View full text Add to dashboard Cite

a b s t r a c tIn this paper, melting of a phase change material (PCM) in a multi-tube heat exchanger (MTHX) is investigated. Water, as the heat transfer fluid (HTF), flows through the inner tube/tubes and the outer one while RT35 as the PCM fills the middle. The aim of this study is to investigate the effect of number of inner tubes as a geometrical parameter during charging process. Also consequences of increasing operational parameters including the HTF mass flow rate and inlet temperature are studied. In order to understand the effects of the proposed configurations, a comparison between double pipe and simple MTHX is carried out. Results show that as the inlet temperature increases melting process accelerates and complete melting time reduces, whereas, similar mass flow rate increase doesn't reduce the melting time to such an extent. By increasing the number of inner tubes from 1 to 4 in the shell side of the MTHX, melt region enlarges and its including vortices strengthens which leads to a dominated convective heat transfer and thus a higher melting rate. This increase in number of tubes leads to 29% reduction in melting time.

show abstract

Numerical heat transfer studies of a latent heat storage system containing nano-enhanced phase change material

Cited by 75 publications

References 4 publications

Nano-enhanced phase change materials for improved building performance

Nano-enhanced phase change materials for improved building performance

Melting of Nanoprticle-Enhanced Phase Change Material inside Shell and Tube Heat Exchanger

Phase change in multi-tube heat exchangers

Contact Info

Product

Resources

About