Article | Proceedings of the 11th International Modelica Conference, Versailles, France, September 21-23, 2015 | Modeling of the German National Standard for High Pressure Natural Gas Flow Metering in Modelica
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Title:
Modeling of the German National Standard for High Pressure Natural Gas Flow Metering in Modelica
Author:
Michael von der Heyde: Institut für Elektrische Energiesysteme und Automation, TUHH, Germany Gerhard Schmitz: Institut für Thermofluiddynamik, TUHH, Germany Bodo Mickan: Physikalisch-Technische Bundesanstalt, Germany
DOI:
10.3384/ecp15118663
Download:
Full text (pdf)
Year:
2015
Conference:
Proceedings of the 11th International Modelica Conference, Versailles, France, September 21-23, 2015
Issue:
118
Article no.:
071
Pages:
663-670
No. of pages:
8
Publication type:
Abstract and Fulltext
Published:
2015-09-18
ISBN:
978-91-7685-955-1
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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The German national metrological institute Physikalisch-Technische Bundesanstalt uses a High Pressure Piston Prover as the primary standard for calibration of high pressure natural gas flow meters. In the High Pressure Piston Prover the gas flow rate is determined by measuring the time a piston needs to displace a defined enclosed volume of gas. Fluctuating piston velocity during measurement can be a significant source of uncertainty if not considered in an appropriate way. A computational model was developed to investigate means for the reduction of this uncertainty. This model is presented in detail. It is written in Modelica. 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. Using Modelica as modeling language was a key for success, because Modelica is object-oriented and acausal. Furthermore the Modelica Standard Library has been utilized, which contains models from various physical domain such as thermodynamics, fluid flow and tribology.

Keywords: Modeling of Multi-Domain Physical Systems; High Pressure Piston Prover; High Pressure Natural Gas Flow Metering

Proceedings of the 11th International Modelica Conference, Versailles, France, September 21-23, 2015

Author:
Michael von der Heyde, Gerhard Schmitz, Bodo Mickan
Title:
Modeling of the German National Standard for High Pressure Natural Gas Flow Metering in Modelica
DOI:
http://dx.doi.org/10.3384/ecp15118663
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Proceedings of the 11th International Modelica Conference, Versailles, France, September 21-23, 2015

Author:
Michael von der Heyde, Gerhard Schmitz, Bodo Mickan
Title:
Modeling of the German National Standard for High Pressure Natural Gas Flow Metering in Modelica
DOI:
http://dx.doi.org/10.3384/ecp15118663
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