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RESEARCH PAPERS

The Influence of Twisted Tapes in Subcritical, Once-Through Vapor Generators in Counter flow

[+] Author and Article Information
M. Cumo, G. E. Farello, G. Ferrari, G. Palazzi

Laboratorio Tecnologie Reattori, COMITATO NAZIONALE per l’ ENERGIA NUCLEARE, Centro di Studi Nucleari della Casaccia, Italy

J. Heat Transfer 96(3), 365-370 (Aug 01, 1974) (6 pages) doi:10.1115/1.3450207 History: Received June 20, 1974; Online August 11, 2010

Abstract

The swirl flow of Freon 12 in a tubular heat exchanger, indirectly heated by forced convection of water in an annular gap, is studied. Two identical situations are compared, with and without a twisted tape, to deduce the influence of the swirl flow in the particularly interesting boundary condition of indirect heating by another fluid (and not simply of uniform Joule heating). The heat transfer is greatly increased by the swirl flow, up to a factor of two at the burnout or dryout point.

Copyright © 1974 by ASME
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