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Article

Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling

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Department of Electrical Machines and Apparatus, Riga Technical University, Kaļķu iela 1, LV-1658 Riga, Latvia
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Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
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CISE—Electromechatronic Systems Research Centre, University of Beira Interior, P 6201-001 Covilhã, Portugal
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Department of Electrical Engineering and Automation, Aalto University, P.O. Box 15500, 00076 Aalto, Finland
*
Author to whom correspondence should be addressed.
Academic Editor: Ooi Kim Tiow
Machines 2021, 9(6), 120; https://doi.org/10.3390/machines9060120
Received: 22 May 2021 / Revised: 11 June 2021 / Accepted: 16 June 2021 / Published: 18 June 2021
(This article belongs to the Special Issue Thermal Analysis of Electric Machine Drives)
This paper presents the analytical calculation of the heat transfer coefficient of a complex housing shape of a Totally Enclosed Fan-Cooled (TEFC) industrial machine when it works below 20% of its nominal speed or close to stall. Therefore, passive cooling is dominant, and most of the heat is extracted by the combination of natural convection and radiation phenomena. Under these conditions, the area-based composite approach was used for the development of the analytical calculation method. A test rig using a TEFC Synchronous Reluctance Motor (SynRM) was constructed, and the collected experimental data was used to validate the proposed analytical method successfully. View Full-Text
Keywords: analytical approach; AC motor; heat transfer; passive cooling; natural convection; radiation; thermal analysis; totally enclosed fan-cooled machine; view factor analytical approach; AC motor; heat transfer; passive cooling; natural convection; radiation; thermal analysis; totally enclosed fan-cooled machine; view factor
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MDPI and ACS Style

Shams Ghahfarokhi, P.; Podgornovs, A.; Kallaste, A.; Cardoso, A.J.M.; Belahcen, A.; Vaimann, T.; Asad, B.; Tiismus, H. Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling. Machines 2021, 9, 120. https://doi.org/10.3390/machines9060120

AMA Style

Shams Ghahfarokhi P, Podgornovs A, Kallaste A, Cardoso AJM, Belahcen A, Vaimann T, Asad B, Tiismus H. Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling. Machines. 2021; 9(6):120. https://doi.org/10.3390/machines9060120

Chicago/Turabian Style

Shams Ghahfarokhi, Payam, Andrejs Podgornovs, Ants Kallaste, Antonio J.M. Cardoso, Anouar Belahcen, Toomas Vaimann, Bilal Asad, and Hans Tiismus. 2021. "Determination of Heat Transfer Coefficient from Housing Surface of a Totally Enclosed Fan-Cooled Machine during Passive Cooling" Machines 9, no. 6: 120. https://doi.org/10.3390/machines9060120

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