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

Language

en

Proquest ID

AAI9202401

File Format

application/pdf

File Size

158 pages

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