Thermal performance of shell-and-tube polymeric hollow fiber heat exchangers as oil coolers
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Date
2024-10-25
Authors
Astrouski, Ilja
Kůdelová, Tereza
Bartuli, Erik
0000-0003-1716-5242Advisor
Referee
Mark
Journal Title
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Volume Title
Publisher
Elsevier
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Abstract
Motor oil must be appropriately treated in motors, and aluminum plate heat exchangers are used to cool it. An aluminum heat exchanger is an additional part of the oil treatment module, which increases its size and weight. Two compact plastic shell-and-tube heat exchangers were tested alongside with aluminum heat exchanger to evaluate the efficiency of the plastic cooling core inside the oil module. A total of 63 experimental points were tested on three heat exchangers with good thermal balance (discrepancy of about 1,8 %), and the data were used to evaluate the heat transfer coefficients. While plastic unit PA11 showed the heat outputs exceeding the heat output of the aluminum plate unit by about 7 %, the pressure drops were about ten times higher. The unit PEEK showed good performance and pressure drops on the oil side, but the heat transfer was limited by a small heat transfer surface. Analysis of thermal resistances confirmed that the thermal resistance between the wall and the oil is dominant due to the oil's low thermal conductivity and high viscosity. The results showed that optimization of the fiber structures is needed, aiming to increase the oil flow around the fiber structures.
Description
Citation
Case Studies in Thermal Engineering. 2024, vol. 63, issue 11, p. 1-11.
https://www.sciencedirect.com/science/article/pii/S2214157X24013601
https://www.sciencedirect.com/science/article/pii/S2214157X24013601
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Peer-reviewed
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Published version
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Language of document
en
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Defence
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
http://creativecommons.org/licenses/by-nc-nd/4.0/