Transient Response of Turbine Flow Meters During the Application at a High Pressure Piston Prover |
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| Bodo Mickan, Rainer Kramer, Volker Strunck, Toralf Dietz |
- Abstract:
- In Germany, a high pressure piston prover has been operated as the national volumetric primary standard for high-pressure natural gas for more than 15 years. The reliability and the claimed uncertainty of this system was proven in international key comparisons in which all relevant physical principles of traceability for gas measurements were assed.
One important part of the uncertainty budget for the volume at the location of the meter under test (MuT) are dynamic effects caused by the limited dynamic in the transient response of the MuT in its indication of the flow. This impact of the limited transient response can be corrected if the volume indication (pulses) of the meter is measured with a high time resolution and if an appropriate model of the transient response for the meter is available.
The paper will describe the results of determination of the system model for a turbine meter and the model parameters. The experimental determination of the system parameters were based on measurements of meter indication as well as flow speed by means of LDV-equipment (at atmospheric conditions) and their verification by means of an ultrasonic-meter (at high pressure). The positive effect on the calibration results with the high pressure piston prover will be demonstrated and discussed. - Keywords:
- piston prover, mechanical flow meter, turbine meter, transient response, corrected indication, Laser Doppler velocimetry, ultra sonic meter
- Download:
- IMEKO-TC9-2010-023.pdf
- DOI:
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