An experimental comparison of enhanced heat transfer condenser tubing.
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Authors
Fenner, James Henry
Subjects
Film condensation
Enhanced heat transfer
Condensers
Enhanced heat transfer
Condensers
Advisors
Marto, Paul J.
Date of Issue
1978-09
Date
September 1978
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Ten 15.9 mm (5/8 in.) nominal outside diameter geometrically enhanced tubes of different metals were tested to determine their heat transfer and hydrodynamic performance. Results were compared to smooth copper-nickel tubes. Steam at about 21kPa (3 psia) was condensed on the outside surface of each enhanced tube, horizontally mounted in the center of a dummy tube bank. Each tube was cooled on the inside by water at velocities of 2.7 to 7.6 m/sec (3 to 25 ft/sec). The overall heat transfer coefficient was determined from experimental data. The inside heat transfer coefficients were determined using the Wilson plot technique. Friction factor in the enhanced section was determined from the cooling water pressure drop. Enhanced geometries (utilizing pitch, helix angle and groove depth) were found to improve the corrected overall heat transfer coefficient by as much as 2 times that for smooth tubes. Use of enhanced tubes in place of smooth tubes will permit a decrease in condenser tube surface area from 17 to 53 percent for constant heat loads and constant pumping power. (Author)
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Research supported by the Naval Sea Systems Command under work request N0002477-WR74134
Funder
Research supported by the Naval Sea Systems Command under work request N0002477-WR74134
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.