Modeling the Effects of Horizontal Transverse Vibrations on the Thermal Behavior and the Ampacity of Rectangular Bus Bars

The purpose of this research is to correctly model steady-state heat transfer in and around rectangular bus bars installed horizontally in an indoor environment and to estimate the corresponding ampacities, considering the effects of horizontal transverse vibrations caused by electromagnetic forces....

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Bibliographic Details
Published in:Applied sciences 2023-06, Vol.13 (11), p.6745
Main Authors: Garić, Ljubiša, Klimenta, Dardan, Andriukaitis, Darius, Jovanović, Saša
Format: Article
Language:English
Subjects:
Alloys
Aluminum alloys
ampacity
Amplitudes
Analysis
analytical thermal modeling
bus bar
Convection
Electromagnetic forces
Electromagnetism
Finite element method
finite element method (FEM)
Forced convection
Free convection
Heat transfer
horizontal transverse vibration
Indoor environments
Modelling
steady-state heat transfer
Transverse oscillation
Vibration
Vibration effects
Vibrations
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Summary:The purpose of this research is to correctly model steady-state heat transfer in and around rectangular bus bars installed horizontally in an indoor environment and to estimate the corresponding ampacities, considering the effects of horizontal transverse vibrations caused by electromagnetic forces. This thermo-electro-magneto-mechanical problem is solved analytically using correlations determined experimentally by other researchers, while the accuracy of the obtained results is verified numerically using the finite element method (FEM). The novelties of the developed model are as follows. First, modeling the effects of horizontal transverse vibrations on free convection from the top and bottom surfaces of rectangular bus bars via forced convection for different characteristic lengths. Second, modeling the effects of vibration amplitudes and vibration frequencies on the bus bar ampacity. Third, introducing the existing vibration classes (A, B, and C) into the analytical and FEM-based thermal analyses. The results show that with an increase either in the vibration amplitude or the vibration frequency, there is a greater convection-based dissipation of heat from the bus bars and an increase in their ampacity. Finally, for the standard vibration classes, it is found that the effect of horizontal transverse vibrations on the ampacity can be up to 41.99% for Class C.
ISSN:2076-3417
2076-3417
DOI:10.3390/app13116745