Condensation of refrigerants on small tube bundles
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Authors
Mabrey, Burlin Davis
Subjects
R-113
R-114
Condensation
Heat-transfer coefficient
Finned tubes
Enhancement ratio
Filmwise
Inundation
Tube bundle
Tube bundle
R-114
Condensation
Heat-transfer coefficient
Finned tubes
Enhancement ratio
Filmwise
Inundation
Tube bundle
Tube bundle
Advisors
Marto, P.J.
Wanniarachchi, Amarawansa S.
Date of Issue
1988-12
Date
December 1988
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The construction of an apparatus for the condensation performance testing of a horizontal bundle of four tubes with various refrigerants was completed. The apparatus was instrumented, and data reduction software was developed to provide bundle and single tube condensation data.
Two tube bundles were tested, smooth copper tubes and low integral-fin copper-nickel tubes, with two refrigerants, R-114 and R-113. An enhancement ratio of about 2.0 for the overall heat transfer coefficient was demonstrated for the finned tubes over the smooth tubes.
Internal contamination, possibly due to a breakdown of the refrigerant molecules when subjected to high temperatures in the boiling chamber, inhibited further meaningful data collection. Recommendations for improvement of the test apparatus are made.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
104 p.
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.