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

• Autorzy: Cieśliński Janusz T. , Fabrykiewicz Maciej , Wiśniewski Tomasz S. , Kubiś Michał , Smoleń Sławomir , Eicke Albrecht , Dutkowski Krzysztof , Głuszek-Czarnecka Małgorzata

Identyfikatory

DOI

10.24425/ather.2023.149732

• Języki publikacji: EN

Abstrakty

EN

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%.

Słowa kluczowe

EN

PCM; viscosity; viscometer; temperature; shear rate

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2023
• Tom: Vol. 44, no 4
• Strony: 123--139
• Opis fizyczny: Bibliogr. 30 poz., rys.

Twórcy

autor

Cieśliński Janusz T.

• Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland

autor

Fabrykiewicz Maciej

• Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland

autor

Wiśniewski Tomasz S.

• Warsaw University of Technology, Nowowiejska 21/25, 00-665 Warsaw, Poland

autor

Kubiś Michał

• Warsaw University of Technology, Nowowiejska 21/25, 00-665 Warsaw, Poland

autor

Smoleń Sławomir

• Hochschule Bremen, JR Mayer-Institut für Energietechnik, Neustadswall 30, 28199 Bremen, Germany

autor

Eicke Albrecht

• Hochschule Bremen, JR Mayer-Institut für Energietechnik, Neustadswall 30, 28199 Bremen, Germany

autor

Dutkowski Krzysztof

• Koszalin University of Technology, Racławicka 15-17, 75-620 Koszalin, Poland

autor

Głuszek-Czarnecka Małgorzata

• Smart Fluid Inc., Rydygiera 8/20A, 01-793 Warsaw, Poland

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