LAPSE:2021.0491
Published Article
LAPSE:2021.0491
Experimental Study of the Convective Heat Transfer and Local Thermal Equilibrium in Ceramic Foam
Siqi Xu, Zhiyong Wu, Hongyan Lu, Lixin Yang
June 2, 2021
Foam materials have been widely used in various industrial applications, where higher and higher heat and mass transfer performances are pursued. However, the mechanism of many factors on the heat transfer performances is still unclear. The main purpose of this article is to investigate how the porous properties, porosity, cell size and the sample thickness affect the volumetric convective heat transfer. In this study, the single-blow method is used to determine the volumetric heat transfer coefficient of ceramics foam in the temperature range from 283 K to 323 K. In particular, sensitivity analysis of the foam porosity, cell size, velocity and the sample thickness on the volumetric heat transfer coefficient within the ceramics foam were all conducted. The results indicate that the sample thickness has a significant effect on the volumetric heat transfer coefficient which decreases with the sample thickness. In addition, the local thermal equilibrium phenomenon is verified and its influence on the volumetric heat transfer coefficient discussed. Based on the experimental data, a new correlation is proposed that includes sample thickness, porosity, superficial velocity and fluid properties. This study is crucial to the theory of the convective heat transfer inside the porous media, and can be used to guide the design and optimization of volumetric solar air receivers, compact heat exchangers, heat sinks, heat regenerators, packed bed reactors and so on.
Keywords
ceramic foam, local thermal equilibrium, sample thickness, single-blow method, volumetric heat transfer coefficient
Subject
Suggested Citation
Xu S, Wu Z, Lu H, Yang L. Experimental Study of the Convective Heat Transfer and Local Thermal Equilibrium in Ceramic Foam. (2021). LAPSE:2021.0491
Author Affiliations
Xu S: Institute of Thermal Engineering, School of Mechanical Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale, Beijing 100044, Chi
Wu Z: The Key Laboratory of Solar Thermal Energy and Photovoltaic System, Institute of Electrical Engineering Chinese Academy of Sciences, Beijing 100190, China
Lu H: Institute of Thermal Engineering, School of Mechanical Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale, Beijing 100044, Chi
Yang L: Institute of Thermal Engineering, School of Mechanical Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale, Beijing 100044, Chi [ORCID]
Journal Name
Processes
Volume
8
Issue
11
Article Number
E1490
Year
2020
Publication Date
2020-11-18
Published Version
ISSN
2227-9717
Version Comments
Original Submission
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PII: pr8111490, Publication Type: Journal Article
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LAPSE:2021.0491
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doi:10.3390/pr8111490
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Jun 2, 2021
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CC BY 4.0
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[v1] (Original Submission)
Jun 2, 2021
 
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Jun 2, 2021
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Original Submitter
Calvin Tsay
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