Preparation, characterization, and thermal properties of microencapsulated phase change material for thermal energy storage

Alkan, Cemil; Sarı, Ahmet; Karaipekli, Ali; Uzun, Orhan

doi:10.1016/j.solmat.2008.09.009

Cited by 395 publications

(143 citation statements)

References 18 publications

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“…For instance, Alkan et al [54] encapsulated docosane with PMMA for thermal energy storage material. The capsules contained 28wt% of core material with a narrow particle size distribution (average particle size was 0.16 μm) and were carefully controlled at emulsion stirring rate of 2000 rpm.…”

Section: Emulsion/miniemulsion Polymerizationmentioning

confidence: 99%

“…The results showed good thermal stability for the paraffin and acetamide after 1500 thermal cycles. Alkan et al [54] also performed series of thermal stability tests on PMMA/docosane microcapsules using their DSC curves and FT-IR data and found no significant changes in their phase change temperatures, latent heat enthalpies and chemical structures after number of thermal cycles. …”

Section: Thermal Stabilitymentioning

confidence: 99%

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Review of solid–liquid phase change materials and their encapsulation technologies

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

781

267

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Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition, they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles was identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs. Abstract: Various types of solid-liquid phase change materials (PCMs) have been reviewed for thermal energy storage applications. The review has shown that organic solid-liquid PCMs have much more advantages and capabilities than inorganic PCMs but do possess low thermal conductivity and density as well as being flammable. Inorganic PCMs possess higher heat storage capacities and conductivities, cheaper and readily available as well as being non-flammable, but do experience supercooling and phase segregation problems during phase change process. The review has also shown that eutectic PCMs have unique advantage since their melting points can be adjusted. In addition they have relatively high thermal conductivity and density but they possess low latent and specific heat capacities. Encapsulation technologies and shell materials have also been examined and limitations established. The morphology of particles were identified as a key influencing factor on the thermal and chemical stability and the mechanical strength of encapsulated PCMs. In general, in-situ polymerization method appears to offer the best technological approach in terms of encapsulation efficiency and structural integrity of core material. There is however the need for the development of enhancement methods and standardization of testing procedures for microencapsulated PCMs.

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Section: Emulsion/miniemulsion Polymerizationmentioning

confidence: 99%

Section: Thermal Stabilitymentioning

confidence: 99%

Review of solid–liquid phase change materials and their encapsulation technologies

Darkwa

Kokogiannakis

2015

Renewable and Sustainable Energy Reviews

781

267

View full text Add to dashboard Cite

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“…As deduced from the curve, 317.76K is the melting temperature of pristine docosane which is comparable to experimentally determined values (316-319K). 6,45 It is imperative to note that crystallization temperature of docosane is reportedly 314.4K while its melting/fusion temperature is observed to be 314.6 K. 1 Additionally, the literature review indicates that glass transition temperature of docosane is considerably below room temperature. 32 So, the bulk atomistic model of the nanocomposites will initially possess amorphous (solid) docosane.…”

Section: Resultsmentioning

confidence: 99%

“…In the same direction, phase change materials (PCMs) provide a viable route for utilization of intermittent renewable sources and development of potential thermal energy storage devices. [1][2][3][4] Due to their excellent capability of latent thermal heat storage in transient applications, PCMs have been the focus of research for the past few decades. This has led to significant commercialization, which has been recently documented.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics insight to phase transition in n-alkanes with carbon nanofillers

Rastogi

Vaish

2015

AIP Advances

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The present work aims to investigate the phase transition, dispersion and diffusion behavior of nanocomposites of carbon nanotube (CNT) and straight chain alkanes. These materials are potential candidates for organic phase change materials(PCMs) and have attracted flurry of research recently. Accurate experimental evaluation of the mass, thermal and transport properties of such composites is both difficult as well as economically taxing. Additionally it is crucial to understand the factors that results in modification or enhancement of their characteristic at atomic or molecular level. Classical molecular dynamics approach has been extended to elucidate the same. Bulk atomistic models have been generated and subjected to rigorous multistage equilibration. To reaffirm the approach, both canonical and constant-temperature, constant- pressure ensembles were employed to simulate the models under consideration. Explicit determination of kinetic, potential, non-bond and total energy assisted in understanding the enhanced thermal and transport property of the nanocomposites from molecular point of view. Crucial parameters including mean square displacement and simulated self diffusion coefficient precisely define the balance of the thermodynamic and hydrodynamic interactions. Radial distribution function also reflected the density variation, strength and mobility of the nanocomposites. It is expected that CNT functionalization could improve the dispersion within n-alkane matrix. This would further ameliorate the mass and thermal properties of the composite. Additionally, the determined density was in good agreement with experimental data. Thus, molecular dynamics can be utilized as a high throughput technique for theoretical investigation of nanocomposites PCMs.

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“…The properties of urea and thiourea differ significantly because of the difference in electronegativity between sulfur and oxygen [1]. Thiourea derivatives are selective analytical reagents, especially for the determination of transition metal in complexes [2].…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies between Chemical and Tribochemical Reactions of Some Metal Complexes Derived from N-(O-Hydoxyphenyl)-N'-phenylthiourea (L)

Al-Ashqar¹

2016

OJIC

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Preparation, characterization, and thermal properties of microencapsulated phase change material for thermal energy storage

Cited by 395 publications

References 18 publications

Review of solid–liquid phase change materials and their encapsulation technologies

Review of solid–liquid phase change materials and their encapsulation technologies

Molecular dynamics insight to phase transition in n-alkanes with carbon nanofillers

Comparative Studies between Chemical and Tribochemical Reactions of Some Metal Complexes Derived from N-(O-Hydoxyphenyl)-N'-phenylthiourea (L)

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