Condensation of Refrigerants on Small Tube Bundles

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. Condensation; Heat-transfer coefficient; Finned tubes; Enhancement ratio; Filmwise; Inundation; Tube bundle, Refrigeration systems.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA205219

Entities

People

  • Burlin D. Mabrey

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Control Panels
  • Data Acquisition
  • Engineering
  • Flow Rate
  • Geometry
  • Heat Energy
  • Heat Flux
  • Heat Transfer
  • Heat Transfer Coefficients
  • Latent Heat
  • Measurement
  • Mechanical Engineering
  • Phase Transformations
  • Test And Evaluation
  • Thermal Conductivity
  • United States

Fields of Study

  • Engineering

Readers

  • Combustion and Flow Dynamics.