Determination of heat transfer coefficient from housing surface of a totally enclosed fan-cooled machine during passive cooling

Payam Shams Ghahfarokhi*, Andrejs Podgornovs, Ants Kallaste, Antonio J.Marques Cardoso, Anouar Belahcen, Toomas Vaimann, Bilal Asad, Hans Tiismus

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

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.

Original languageEnglish
Article number120
Number of pages12
JournalMachines
Volume9
Issue number6
DOIs
Publication statusPublished - Jun 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • AC motor
  • Analytical approach
  • Heat transfer
  • Natural convection
  • Passive cooling
  • Radiation
  • Thermal analysis
  • Totally enclosed fan-cooled machine
  • View factor

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