Determination of Heat Transfer Coefficient for the Air Forced Cooling Over a Flat Side of Coil

2019
Payam Shams Ghahfarokhi, Ants Kallaste, Anouar Belahcen, Toomas Vaimann

The paper deals with the analytical and experimental determination of the forced convection heat transfer coefficients over the flat coil module. In the analytical part, the forced convection coefficients at different wind speeds are calculated based on various known equations of the forced convection heat transfer coefficient with unheated starting length. The experimental part presents the description of the test: loading the coil with DC current and measurements of the coil temperatures with thermal sensors while it was inside a wind tunnel. Based on the measurement, the convection coefficients were determined. In the final part, the experimental and analytical results are compared. It is found that the accuracy of the analytical results is more precise in highly turbulent flows.

Keywords
Flat surface; Forced convection; Heat transfer coefficient; Laminar and turbulent flow.
DOI
10.2478/ecce-2019-0003
Hyperlink
https://content.sciendo.com/view/journals/ecce/15/1/ecce.15.issue-1.xml

Ghahfarokhi, P., Kallaste, A., Belahcen, A., Vaimann, T. Determination of Heat Transfer Coefficient for the Air Forced Cooling Over a Flat Side of Coil. Electrical, Control and Communication Engineering, 2019, Vol.15, No.1, pp.15-20. ISSN 2255-9140. e-ISSN 2255-9159. Available from: doi:10.2478/ecce-2019-0003

Publication language
English (en)