(179f) Quantification of Uncertainties in Experimental Liquid Density and Viscosity at Hthp Conditions By Using the Corresponding States Law As Arbitrator
AIChE Annual Meeting
2017
2017 Annual Meeting
Engineering Sciences and Fundamentals
Thermodynamic and Transport Properties Under Pressure
Monday, October 30, 2017 - 2:10pm to 2:30pm
As temperature and pressure are the independent variables, the corresponding states law by which the measured data is displayed as reduced density and the reduced viscosity versus the reduced temperature (TR) and the reduced pressure (PR) are very desirable. Consequently, the corresponding states law provides a basis of infer critical density through the reduced VdW equation of state and likewise the measured viscosity provides inference for critical viscosity through the reduced VdW transport equation of state. The uncertainty quantification is achieved by random scatter plots of the critical densities and critical viscosities back-out of the measured data versus (PR/TR) at the HTHP conditions. The single continuous curve through the data or lack of a single curve through the scatter plots gives an indication of the reliability and internal consistency among the experimentally measured data. The plots also provide a measure of reliability and consistency in the transport data from the various Worldwide Laboratories.
The analysis of results shows that no systematic errors in liquid densities and liquid viscosity of Squalane at HTHP conditions can be associated with neither the various densitometer designs nor the various worldwide viscometer designs. However, it is still impossible to reduce the empirical mathematical equation used to derive the measured viscosity to the dimensionless form. So, we assume the major uncertainties in the experimentally measured viscosity data are due to the lack of reference standard for the various worldwide equipment standard constant, K. Nonetheless, the CS reduced chart provides an important way of establishing viscosity at the HTHP conditions.
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