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Abstract
Although there are many methods and instruments for measuring viscosity, it is still difficult to determine a reliable value of the dynamic viscosity of complex chemicals such as paraffins and fatty acids. This is due to the complex and heterogeneous structure of these compounds in the case of commercial products. On the other hand, the measuring instrument should be selected very carefully, including its measuring principle and measuring range. This paper presents results of viscosity measurements of three organic PCMs (phase change materials) obtained in four different research institutions. Commercial products: paraffin, myristic acid (97%) and mixture of palmitic acid (55%) and stearic acid (45%) were selected as PCMs. Four different viscometers, namely Fungilab V-Pad, Rheotest LK 2.2, Rheometer Anton Paar MCR 102, and Brookfield DV-II + Pro have been used to determine temperature dependent dynamic viscosity of the tested PCMs. Using a large database of present measurement results, correlations were developed to calculate the dynamic viscosity of fatty acids and paraffins, which predict the experimental data within a band of ±20%.
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Authors (8)
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Maciej Fabrykiewicz
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Tomasz Wiśniewski prof. dr hab. inż.
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Michał Kubiś dr inż.
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Slawomir Smolen
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Albrecht Eicke
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Krzysztof Dutkowski dr hab. inż.
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Małgorzata Głuszek-Czarnecka
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/ather.2023.149732
- License
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
Archives of Thermodynamics
no. 44,
pages 123 - 139,
ISSN: 1231-0956 - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Cieśliński J., Fabrykiewicz M., Wiśniewski T., Kubiś M., Smolen S., Eicke A., Dutkowski K., Głuszek-Czarnecka M.: New empirical correlations for the viscosity of selected organic phase change materials// Archives of Thermodynamics -Vol. 44,iss. 4 (2023), s.123-139
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/ather.2023.149732
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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