Enhanced condensation of R-113 on a small bundle of horizontal tubes
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Authors
Mazzone, Robert Walter
Subjects
Advisors
Marto, P.J.
Memory, Stephen
Date of Issue
1991-12
Date
December 1991
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Condensation of r-113 was studied using an evaporator condenser test platform. the condenser section contained four horizontal tubes (nominal outer diameter 15.9 mm)forming a vertical in line column with a pitch-to-diameter ratio of 2.25 and a condensing length of 1.2 m. the condenser tubes could be operated either individually (ie. as a single tube apparatus) or as a small tube bundle. this allowed investigation of the effects of condensate inundation on different types of condenser tubes. tubes tested were smooth copper tubes, copper/nickel korodense roped tubes, korodense tubes wrapped with wire, and copper /nickel finned tubes (26 fpi). the outside heat transfer coefficient was calculated by experimentally determining the overall heat transfer coefficient and then using a modified wilson plot procedure. great care was taken to ensure the results were not vitiated by the presence of non condensibles. results obtained with smooth copper tubes are in agreement with published data and verify satisfactory operation of the test platform. furthermore, problems associated with the apparatus encounted by previous workers were successfully overcome. in comparison to the top smooth tubes, the copper nickel to korodense tube yielded about a 22% increase.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
220 p.;28 cm.
Citation
Distribution Statement
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.