Uncertainty in Primary Gas Flow Standards Due to Flow Work Phenomena
John D. Wright, Aaron N. Johnson
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.
10th International Conference on Flow Measurement, FLOMEKO
diverter valves, flow work, gas flow calibration, inventory volume, primary gas flow standard, uncertainty
and Johnson, A.
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 December 9, 2023)