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Open AccessFeature PaperArticle

Experimental and Numerical Investigation of the Air Side Heat Transfer of a Finned Tubes Heat Exchanger

Institute of Energy Engineering and Chemical Machinery, University of Miskolc, H-3515 Miskolc, Hungary
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Processes 2020, 8(7), 773; https://doi.org/10.3390/pr8070773 (registering DOI)
Received: 27 May 2020 / Revised: 22 June 2020 / Accepted: 26 June 2020 / Published: 1 July 2020
(This article belongs to the Special Issue Modeling, Simulation and Computation on Dynamics of Complex Fluids)
The heat transfer was experimentally and numerically studied in this article. Characteristics of circular fins over a bent tube at different tube orientations and air velocities were investigated, and then compared with analytical results from the literature. For the experimental investigation, a simple setup was compiled inside of a wind tunnel, where the velocity and the inlet temperature of the air; the volume flow rate; and the inlet and outlet temperatures of the water were measured. Three different orientations were investigated with the set-up: the bent tube in line with the air flow with the same and opposite water inlet positions, and the bent tube perpendicular to the air flow. According to the results, the position has a significant effect on the heat transfer coefficient. A numerical study was also performed in accordance with the measurements in ANSYS-CFX computational fluid dynamics (CFD) software. The results of the CFD showed an acceptable correlation with the results of measurement; however, the results of analytical calculation from the literature show a significant discrepancy; the calculated heat performance is only about one-third of the measured values. This article presents the steps of measurement, simulation and analytical calculations, and shows solution possibilities in the calculation of the air-side heat transfer functions. View Full-Text
Keywords: heat transfer; finned tube; CFD heat transfer; finned tube; CFD
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Petrik, M.; Szepesi, G. Experimental and Numerical Investigation of the Air Side Heat Transfer of a Finned Tubes Heat Exchanger. Processes 2020, 8, 773.

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