New empirical correlations for the viscosity of selected organic phase change materials - Publikacja - MOST Wiedzy

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New empirical correlations for the viscosity of selected organic phase change materials

Abstrakt

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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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
Archives of Thermodynamics nr 44, strony 123 - 139,
ISSN: 1231-0956
Język:
angielski
Rok wydania:
2023
Opis bibliograficzny:
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:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.24425/ather.2023.149732
Źródła finansowania:
  • COST_FREE
Weryfikacja:
Politechnika Gdańska

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