Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

A NEW PERSPECTIVE ON THE IMPACT OF FOULING ON THE PERFORMANCE OF FINNED HEAT EXCHANGERS IN COMPARISON TO HEAT EXCHANGERS WITHOUT EXTENDED SURFACE

Get access (open in a dialog) DOI: 10.1615/IHTC10.2150
pages 423-428

Abstrakt

The somewhat interrelated concepts that any fixed level of fouling will be less detrimental to heat transfer through finned surfaces than unfinned surfaces and that finned surfaces may foul at a slower pace than unfinned surfaces have spawned a number of investigations and reports on the subjects. However, the existence of these related but different fouling phenomena coupled with the use of non explicit terms such as "less severe" when describing fouling on extended surfaces has generally helped to slow the recognition and implementation of these ideas outside of the academic environment. Thus, a brief synthesis of some of the more recent reports on the subject have been combined with a graphical technique that highlights these effects in a manner which should be more oriented to the concerns of the practicing engineer in the petrochemical and refining industries. A definite distinction is made between the concept of change in fouling speed and the concept of reduced sensitivity to a fixed fouling deposit. Some of the results arising from treatment of the latter concept may be used immediately in design, selection, and evaluation of a large percentage of heat exchangers.