An Ultrasonic Device for Measuring the Oil Concentration in Flowing Liquid Refrigerant

Meyer, J.J.; Jabardo, J.M.S.

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https://hdl.handle.net/2142/9725 Copy

Description

Title

An Ultrasonic Device for Measuring the Oil Concentration in Flowing Liquid Refrigerant

Author(s)

• Meyer, J.J.
• Jabardo, J.M.S.

Issue Date

1992-09

Keyword(s)

liquid refrigerant

Abstract

Liquid refrigerant/oil concentrations in a flowing system were monitored using speed of sound and temperature measurements. Data were taken for R12 with 3GS and 5GS oils and an R-134a/Ester mixture with concentrations ranging from 0.0 to 10.64 and 0.0 to 9.11 percent by mass, respectively. Temperatures for the tests ranged from -22°C (-7.6 OF) to 40 °C (104 OF). Analysis of the data showed the predicted oil concentration depends linearly on both acoustic velocity and temperature. The technique was very reliable, with uncertainties ofless than 0.23 weight percent for the R-12 mixtures and 0.26 weight percent for the R-134a mixtures at typical system concentrations. A slight dependence of acoustic velocity on pressure was found.

Publisher

Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Air Conditioning and Refrigeration Center TR-24

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/9725

Sponsor(s)/Grant Number(s)

Air Conditioning and Refrigeration Center Project 05

Owning Collections