Impact factor: 0.605
ISSN Print: 1065-5131
You have access to:Volume 20, 2013 Volume 19, 2012 Volume 18, 2011 Volume 17, 2010 Volume 16, 2009 Volume 15, 2008 Volume 14, 2007 Volume 13, 2006 Volume 12, 2005 Volume 11, 2004 Volume 10, 2003 Volume 9, 2002 Volume 8, 2001 Volume 7, 2000 Volume 6, 1999 Volume 5, 1998 Volume 4, 1997 Volume 3, 1996 Volume 2, 1995 Volume 1, 1994 Volume 1, 1993
Journal of Enhanced Heat Transfer
An Experimental Investigation of the Performance of Cross-Corrugated Plate Heat Exchangers
Department of Mechanical and Aerospace Engineering, Monash University, Australia
Two important variables in plate heat exchanger design are the size (i.e., height H and pitch P) and the orientation (b) of the corrugation embossed on the plates. In this article, the effects of b on the thermal performance of and pressure loss in such an exchanger are investigated through laboratory experimentation for a single-phase application using water. Two rectangular test heat exchangers made from corrugated plates (P = 25 mm and H = 5.5 mm) with b = 45° and 60° were tested. The results showed that the Nusselt number (Nu) and the Darcy friction factor (f) for the 60° channel were higher compared to the 45° sample by a factor of 1.5–2 in the Reynolds (Re) number range 300 < Re < 1700. However, in comparison with a flat plate channel, this factor at Re @ 1000 was of the order of 5 for Nu and as high as 30 for f. Also, the data showed a transitory behavior in the range Re @ 450–900 and 600–1300 for the 60° and 45° samples, respectively. The experimental results are compared with published data from the open literature. While good agreement was found with some studies, a large discrepancy with other experimental data was revealed. This discrepancy is explained by either geometric parameters and/or the experimental techniques used. Also, included in the article is a description of the flow pattern in cross-corrugated cavities and its relation to the plate’s surface temperature. It is shown that even at very low flow rates, the fluid movement is generally erratic and random, generating a fully mixed flow in the heat exchanger.
|Home||Begell Digital Library||eBooks||Journals||References & Proceedings||Research Collections|