Total solidification time of a liquid phase change material enclosed in cylindrical/spherical containers

Bilir, Levent; İlken, Zafer

doi:10.1016/j.applthermaleng.2004.10.005

Cited by 88 publications

(28 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermal energy storage by PCMs can resolve the time mismatch between the energy supply and the consumption of energy, and play the role in switching peak load and increasing efficiency of energy utilization. Ordinary solid-liquid PCMs are inexpensive and owe large latent heat, but they need containers to avoid extra thermal resistance and leakage [5]. The technology of microencapsulation of PCMs (microPCMs) has supplied a proper way to enlarge the utility fields of the PCMs with advantages, including protecting the PCM against the influences of the outside environment, increasing the heat transfer area, and withstand changes in volume [6].…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of microPCMs-filled epoxy matrix composites

Wang

Huang

et al. 2011

Colloid Polym Sci

View full text Add to dashboard Cite

Microencapsulated phase change materials (microPCMs) have been widely applied in solid matrix as thermal-storage or temperature-controlling functional composites. The thermal conductivity of these microPCMs/ matrix composites is an important property need to be considered. In this study, a series of microPCMs have been fabricated using the in situ polymerization with various core/shell ratio and average diameter; the thermal conductivity of microPCMs/epoxy composites were investigated in details. The results show that the microPCMs have smooth surface and regular global shape with compact methanolmelamine-formaldehyde shell. The shell thickness does not greatly influence the phase change behaviors of PCM. Moreover, smaller microPCMs embedded in epoxy can improve the thermal transmission ability of composites. The effect of thermal conductivity of composites can be improved with higher volume fraction (10-30%) of microPCMs; and smaller size microPCMs with the same content of PCM may also enhance the thermal transmission area in matrix. Modeling analysis of relative thermal conductivity indicates that mixing higher thermal conductivity additive in PCM or matrix is an appropriate method to improve the thermal conductivity of microPCMs/matrix composites.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of microPCMs-filled epoxy matrix composites

Wang

Huang

et al. 2011

Colloid Polym Sci

View full text Add to dashboard Cite

show abstract

“…Conventional PCM capsules are mostly in macro size. There are a number of published papers that reported various shell materials such as metals and plastics, and various shapes such as spherical [95][96][97][98][99] and cylindrical [96,[100][101][102]. Micro-encapsulation of PCM is a technology getting significant attention recently [103][104][105][106][107][108] for the advantage of getting larger surface-area-to-volume ratio and also better adaptation to thermal expansion/contraction during phase change processes [103,104].…”

Section: Recent Development Of Pcm Encapsulation Technologiesmentioning

confidence: 98%

Application of phase change materials for thermal energy storage in concentrated solar thermal power plants: A review to recent developments

2015

View full text Add to dashboard Cite

h i g h l i g h t sThermal storage for solar thermal power using phase change materials is reviewed. Various phase change materials and manufacturing techniques are surveyed. Mathematical modeling and simulations to latent heat energy storage is reviewed. Integration of a PCM-based TES unit into a power generation system is discussed. Cost analysis of thermocline latent heat thermal storage systems is reviewed. Keywords: Concentrated solar power (CSP) Thermal energy storage (TES) Phase change material (PCM) Latent heat a b s t r a c tThe objective of this paper is to review the recent technologies of thermal energy storage (TES) using phase change materials (PCM) for various applications, particularly concentrated solar thermal power (CSP) generation systems. Five issues of the technology will be discussed based on a survey to the state-of-the-art development and understandings. The first part is about various phase change materials (PCM) in thermal storage applications and recent development of PCM encapsulation technologies. The second is the current status of research and application of latent heat storage systems in CSP plants. The third is the mathematical modeling and numerical simulations to the phenomenon of latent heat thermal storage. The fourth is about the issues of integration of a PCM-based TES unit into a power generation system and the operation. The last part is a discussion about the cost issues and comparison between sensible and latent heat TES systems. The surveyed information will be very helpful to researchers and engineers in energy storage industry and particularly solar thermal power industry.

show abstract

“…Eames and Adref [20] investigated experimentally freezing and melting processes for water contained in spherical elements of the type used in thermal (ice) storage systems. Bilir and Ilken [21] reported the result of a numerical study on the inward solidification of a liquid phase change material encapsulated in cylindrical and spherical container with a third kind of boundary condition. They used enthalpy method with control volume approach.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of inward solidification inside spherical capsule by using temperature transforming method

Asker

Ganjehsarabi

Çoban

2018

Ain Shams Engineering Journal

View full text Add to dashboard Cite

In this study, a numerical analysis of the inward solidification of phase change material inside spherical capsule is carried out. The spherical capsule that is subjected to convection from the outside surface initially is not at its melting temperature. The control volume approach and temperature transforming method are applied to solve the dimensionless energy equation. The model solution results are validated through a comparison with published experimental data for similar case and it shows a considerably good agreement. The analysis results show that the larger diameter spherical capsules have significantly greater solidification time compared to those with smaller diameters of spherical capsules. In addition, the entropy generation inside spherical capsule is analyzed. It is found that the entropy generation increases with increasing sphere capsule diameter, attains a maximum and then decreases. Ó 2016 Faculty of Engineering, Ain Shams University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

show abstract

Total solidification time of a liquid phase change material enclosed in cylindrical/spherical containers

Cited by 88 publications

References 14 publications

Thermal conductivity of microPCMs-filled epoxy matrix composites

Thermal conductivity of microPCMs-filled epoxy matrix composites

Application of phase change materials for thermal energy storage in concentrated solar thermal power plants: A review to recent developments

Numerical investigation of inward solidification inside spherical capsule by using temperature transforming method

Contact Info

Product

Resources

About