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Improved thermal model for predicting end-windings heat transfer
KTH.
2017 (English)In: 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017, Institute of Electrical and Electronics Engineers (IEEE), 2017, Vol. 2017, p. 4650-4657Conference paper, Published paper (Refereed)
Abstract [en]

The thermal analysis of the end space region of an electrical machine is mainly linked to the characterization of the convective heat transfer between the solid surfaces and the cooling fluid, normally air. Different relations have been proposed in literature by several authors but the calculation of the heat transfer coefficients (HTC) is still mainly related to empirical correlation factors, based on the experience. The aim of this work is to investigate the convection inside the end space region with the double objective of studying how the geometry influences the HTCs and of developing a new improved correlation for the computation of the HTCs. The study is conducted with the support of an advance CFD software. The investigation leads, as main result, to a dimensionless equation that links the Nusselt number to the rotational Reynolds number in the end-space region.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017. Vol. 2017, p. 4650-4657
Keyword [en]
Computational fluid dynamics (CFD), Convection, Electrical machines, End windings, End-space region, Heat transfer, Heat transfer coefficients (HTC)
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-224295DOI: 10.1109/ECCE.2017.8096794Scopus ID: 2-s2.0-85041490290ISBN: 9781509029983 OAI: oai:DiVA.org:kth-224295DiVA, id: diva2:1190760
Conference
9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017, Cincinnati, United States, 1 October 2017 through 5 October 2017
Note

QC 20180315

Available from: 2018-03-15 Created: 2018-03-15 Last updated: 2018-03-15Bibliographically approved

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Basso, Gabriele Luca
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