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Verlagslink DOI: 10.1088/0957-0233/27/8/085009
Titel: Using modelica to investigate the dynamic behaviour of the German national standard for high pressure natural gas flow metering
Sprache: English
Autor/Autorin: Heyde, Michael von der 
Schmitz, Gerhard 
Mickan, Bodo 
Schlagwörter: modelica;modelling dynamic physical systems;high pressure piston prover;high pressure natural gas flow metering
Erscheinungsdatum: 6-Jul-2016
Verlag: IOP
Quellenangabe: Measurement Science and Technology 8 (27): 085009- (2016-07-06)
Zeitschrift oder Schriftenreihe: Measurement science and technology 
Zusammenfassung (englisch): This paper presents a computational model written in Modelica for the high pressure piston prover (HPPP) used as the national primary standard for high pressure natural gas flow metering in Germany. With a piston prover the gas flow rate is determined by measuring the time a piston needs to displace a certain 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. The model was built to investigate measures for the reduction of this uncertainty. Validation shows a 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. The fast and cost effective generation of those results shows the strength of the used modelling approach.
URI: http://tubdok.tub.tuhh.de/handle/11420/1851
DOI: 10.15480/882.1848
ISSN: 0957-0233
Institut: Technische Thermodynamik M-21 
Dokumenttyp: (wissenschaftlicher) Artikel
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