Uncertainty in Primary Gas Flow Standards Due to Flow Work Phenomena

Published

June 1, 2000

Author(s)

John D. Wright, Aaron N. Johnson

Abstract

Static gravimetric and static volumetric gas flow standards are both affected by uncertainty components related to the measurement of the change of mass of gas within the inventory volume. In the process of diverting gas into the collection vessel, rapid pressure and temperature changes occur in the inventory volume. A low uncertainty gas flow standard requires thorough understanding of these transients so that appropriate instrumentation, system design, and operating procedures may be developed. A thermodynamic model for the flow work phenomena is presented with verifying experimental measurements and strategies for minimizing their effects on flow uncertainty are discussed.

Proceedings Title

10th International Conference on Flow Measurement, FLOMEKO

Conference Dates

June 5-8, 2000

Conference Location

Salvador, BR

Conference Title

Proceedings of FLOMEKO 2000

Pub Type

Conferences

Download Paper

Local Download

Keywords

diverter valves, flow work, gas flow calibration, inventory volume, primary gas flow standard, uncertainty

Citation

Wright, J. and Johnson, A. (2000), Uncertainty in Primary Gas Flow Standards Due to Flow Work Phenomena, 10th International Conference on Flow Measurement, FLOMEKO, Salvador, BR, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830673 (Accessed October 24, 2025)