Heat Transfer Enhancement in a Cross-Flow Heat Exchanger with Modified Air Angles of Attack
Publication: Journal of Energy Engineering
Volume 142, Issue 3
Abstract
The technique of heat transfer enhancement of a nonfin cross-flow heat exchanger by a modified air angle of attack is investigated experimentally in this study. Six air angles of attack (i.e., 0°, 30°, 60°, 90°, 120°, and 150°) with the same perimeter are examined to determine their relationships to the overall heat transfer coefficient and the pressure drop; the heat exchanger performance are also tested. In the experiment, hot water (at a temperature of 75°C) with a constant flow rate and air at ambient conditions with various velocities (ranging from 2 to ) flows through the heat exchanger. The results indicate that the modified air angle of attack technique can enhance the overall heat transfer coefficient; however, the pressure drop is also increased.
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Acknowledgments
The authors would like to acknowledge the School of Energy, Environment, and Materials, King Mongkut’s University of Technology Thonburi, for its financial support of this research.
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Information & Authors
Information
Published In
Journal of Energy Engineering
Volume 142 • Issue 3 • September 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Mar 22, 2015
Accepted: Aug 6, 2015
Published online: Sep 23, 2015
Discussion open until: Feb 23, 2016
Published in print: Sep 1, 2016
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