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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

A STUDY OF FLUID DISTRIBUTION IN AN EXPERIMENTAL ELECTRICAL HEATER AND ITS APPLICATION TO HEAT EXCHANGERS

Get access (open in a dialog) DOI: 10.1615/IHTC11.1710
pages 299-304

摘要

This paper focuses on the study of flow distribution in electrical heaters and in two-fluid heat exchangers. First, it is shown that it is more important to understand flow maldistributions for electrical heaters than for two-fluid heat exchangers. The study of the flow distribution in a particular heater shows that backward flows may occur for certain inlet headers. A simple method to homogenize the flow distribution and a simple correlation to predict the amelioration are suggested. The velocity ratio (ratio of the highest velocity in the heater to the lowest velocity), as well as the heater pressure loss, can be calculated with good accuracy. We then apply the original fluid distribution to condensers and counterflow heat exchangers, and show that fluid maldistribution leads to a loss of effectiveness of only 7% for a velocity ratio of 15.