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Modeling of the German National Standard for High Pressure Natural Gas Flow Metering in Modelica
Citation Link: https://doi.org/10.15480/882.2669
Publikationstyp
Conference Paper
Date Issued
2015-09
Sprache
English
Institut
TORE-DOI
TORE-URI
First published in
Number in series
118
Volume
118
Start Page
663
End Page
670
Citation
Linköping Electronic Conference Proceedings (118): 663-670 (2015)
Contribution to Conference
Publisher DOI
ISBN of container
978-91-7685-955-1
The German national metrological institute Physikalisch-Technische Bundesanstalt uses a High Pressure Piston Prover as the primary standard for high pressure natural gas flow meters. The High Pressure Piston Prover measures the gas flow rate using the time a piston needs to displace a defined enclosed volume of gas in a cylinder. Fluctuating piston velocity during measurement can be a significant source of uncertainty if not considered in an appropriate way (Mickan et al., 2010). A computational model written in Modelica was developed to investigate measures for the reduction of this uncertainty. Validation of the model shows good compliance of the piston velocity in the model with measured data for certain volume flow rates. Reduction of the piston weight, variation of the start valve switching time and integration of a flow straightener were found to reduce the piston velocity fluctuations in the model significantly.
Subjects
modeling of multi-domain physical systems
modelica
high pressure piston prover
high pressure natural gas flow metering
DDC Class
620: Ingenieurwissenschaften
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