Degree Type
Dissertation
Date of Award
1991
Degree Name
Doctor of Philosophy
Department
Mechanical Engineering
First Advisor
Michael B. Pate
Abstract
The design and construction of a test facility and methodology for measuring the solubility and viscosity of lubricating oil/refrigerant mixtures at high pressures and temperatures are described. An auxiliary charging system, developed to provide precisely measured quantities of oil and refrigerant to the test facility, is also presented. The test facility was developed under the sponsorship and supervision of ASHRAE which funded this research project (RP-580);The solubility, viscosity and density of mixtures of R-22 and of R-502 with commonly used 150 SUS lubricants have been measured by using this facility. Specifically, results for liquid mixtures of 10% to 40% refrigerant (by mass) in a 150 SUS naphthenic oil and in a 150 SUS alkylbenzene are reported over the temperature range of 100°F (38°C) to 300°F (149°C). The oil/refrigerant mixtures for R-22 were miscible over the complete range tested, while for the R-502/naphthenic oil mixtures, two coexistent liquid phases were encountered in tests at the higher refrigerant concentrations;The property test results are presented in graphical form as well as in the form of empirical correlations based on a nonlinear regression analysis of the experimental data. Comparisons with the limited data previously published in the open literature show reasonable agreement.
DOI
https://doi.org/10.31274/rtd-180813-11081
Publisher
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Copyright Owner
Nolan A. Van Gaalen
Copyright Date
1991
Language
en
Proquest ID
AAI9202401
File Format
application/pdf
File Size
158 pages
Recommended Citation
Van Gaalen, Nolan A., "Methods of measuring the solubility and viscosity of lubricating oil/refrigerant mixtures at high discharge pressures and temperatures " (1991). Retrospective Theses and Dissertations. 10080.
https://lib.dr.iastate.edu/rtd/10080