Publication

Online Measurement of Oil Concentrations of R134a–Oil Mixtures with a Density Flowmeter

Daniel Favrat
1995
Journal Articles

Abstract

A very high accuracy, straight vibrating tube type of density flow meter has been used online to measure oil concentraiton of flowing R-134a/oil mixtures. The calibrations covered oil concentrations from 0-6 wt.% oil over the temperature range from -9.4 to 5.9°C. The oil concentrations were correlated statistically as a function of density, temperature and liquid compressibility to an average error of 0.09 wt.% oil with a 95% confidence limit of 0.21 wt.% oil. In addition, a simplified method not requiring calibration tests was developed for general industrial application of the density flowmeter to any refrigerant-oil mixture combination, with an average error of 0.22 wt.% oil and 95% confidence limit of 0.67 wt.% oil for the present data set.

Official source

https://infoscience.epfl.ch/entities/publication/52dc52f2-943d-4c7f-b367-ccca2fa5f9cb

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Daniel Favrat
1995
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/52dc52f2-943d-4c7f-b367-ccca2fa5f9cb

About this result

Related concepts (32)

Margin of error

The margin of error is a statistic expressing the amount of random sampling error in the results of a survey. The larger the margin of error, the less confidence one should have that a poll result would reflect the result of a census of the entire population. The margin of error will be positive whenever a population is incompletely sampled and the outcome measure has positive variance, which is to say, whenever the measure varies. The term margin of error is often used in non-survey contexts to indicate observational error in reporting measured quantities.

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Online Measurement of Oil Concentrations of R134a–Oil Mixtures with a Density Flowmeter

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