A predictive method to describe the boiling behavior of refrigerant-oil mixtures
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Authors
Lloyd, John R.
Marto, P.J.
Subjects
Boiling, Refrigerants, Oils, Mixtures
Advisors
Date of Issue
1990-12-31
Date
12/31/1990
Publisher
Monterey, CA; Naval Postgraduate School
Language
en_US
Abstract
The need for efficient and environmentally safe refrigerants is of great concern to the Navy, and is driving them to explore the performance of alternate refrigerants for use in shipboard evaporators. Each time a new refrigerant is considered, one must also consider how oil contamination will affect its performance. The present study surveys the literature for a predictive technique to calculate the nucleate boiling heat transfer behavior of refrigerant-oil mixtures that is fundamental to the operation of refrigerant systems. There were three expressions found that could be considered for use. These expressions for the nucleate boiling heat transfer were empirically based formulations, which means that a new series of experiments must be conducted every time a different refrigerant-oil combination is considered for use. An expression that is currently under development for mixtures in general was found that is based only upon the thermophysical properties of the fluids and their mixtures. No empirical constants are necessary. The mass diffusion coefficient of the oil in the refrigerant is found to be the key property to be measured in order to evaluate the predictive capability of this expression. Experiments are proposed to obtain this key property and then to this expression will be developed as the experiments indicate are necessary
Type
Technical Report
Description
Series/Report No
Department
Mechanical Engineering
Organization
Mechanical Engineering (ME)
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
NPS-ME-90-07
Sponsors
David Taylor Research Center, Annapolis, Maryland, Naval Sea Systems Command
Funder
N0002490WR02886
Format
34 p. : ill. ; 28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.