Effects of in-line deflectors on the overall performance of a channel heat exchanger
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Date
Authors
Menni, Younes
Ameur, Houari
Sharifpur, Mohsen
Ahmadi, Mohammad Hossein
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor and Francis
Abstract
The turbulent convective thermal transfer in channel heat exchangers (CHEs) is studied numerically via the CFD (Computational Fluid Dynamics) method. Deflectors are inserted on the hot bottom walls of the heat channel to enhance the hydrothermal characteristics. Various shapes of in-line deflectors are considered, namely: rectangular (a/b = 0.00), cascaded rectangular-triangular (a/b = 0.25, 0.50, and 0.75), and triangular (a/b = 1.00) shapes. From the obtained results, the inclusion of in-line deflectors with a/b = 0.75 has given the most significant thermal enhancement factor, which was higher than that for a/b = 0.00, 0.25, 0.50, and 1.00 by about 5.36, 5.06, 67.27, and 3.88%, respectively. Also, the in-line cascaded deflector’ case (a/b = 0.75) shows an increase in the enhancement factor (η) from 4 to 15.44% over the cases of one deflector (corrugated, rectangular, triangular, trapezoidal, arc, (+), S, 45° V, 45° W, T, Γ, and ε-shaped) or two deflectors (staggered corrugated). This highlights the effectiveness of in-line cascaded rectangular-triangular deflectors with a/b = 0.75 in improving the performance of the proposed exchanger for the conditions adopted.
Description
Keywords
Thermal transfer, Forced convection, Computational fluid dynamics (CFD), Channel heat exchanger, Deflectors
Sustainable Development Goals
Citation
Younes Menni, Houari Ameur, Mohsen Sharifpur & Mohammad Hossein
Ahmadi (2021) Effects of in-line deflectors on the overall performance of a channel heat
exchanger, Engineering Applications of Computational Fluid Mechanics, 15:1, 512-529, DOI:
10.1080/19942060.2021.1893820.