Heat transfer in helical, curved rectangular channels—comparison of type I and type II systems

An experimental study of the heat transfer coefficients for flow of air in curved rectangular channels was undertaken to determine the relative advantages of Type I (aspect ratio > 1) and Type II (aspect ratio < 1) systems in a helical flow geometry. Much higher heat transfer rates (76% increa...

Full description

Saved in:
Bibliographic Details
Published in:International journal of heat and mass transfer 1993, Vol.36 (14), p.3541-3546
Main Authors: Joye, Donald D., Hakun, Andrew G., Joye, Colin D.
Format: Article
Language:English
Subjects:
Applied sciences
Devices using thermal energy
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Heat exchangers
Heat exchangers (included heat transformers, condensers, cooling towers)
Q1
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An experimental study of the heat transfer coefficients for flow of air in curved rectangular channels was undertaken to determine the relative advantages of Type I (aspect ratio > 1) and Type II (aspect ratio < 1) systems in a helical flow geometry. Much higher heat transfer rates (76% increase over that of an equivalent straight duct) were obtained with the Type II system than with the Type I system (6% increase over the straight duct). Although both the radius of curvature and the aspect ratio interact in a complex way to produce heat transfer enhancement, our experiments confirm that the curved channel with the tighter coil will produce the most enhancement.
ISSN:0017-9310
1879-2189
DOI:10.1016/0017-9310(93)90171-2