| Zugriffsnummer | 48685 |
| Dokumenttyp | Bericht |
| Sprache | Englisch |
| Titel | Calculation of compression factors and gas law deviation factors using the modified SGERG-Equation SGERG-mod-H2 |
| Autor(in); Institution |
Schley, Peter; SmartSim GmbH, Essen, GERMANY
Nguyen, Tan-Trieu-Giang; Ruhr-Universität Bochum, Bochum, GERMANY
Span, Roland; Ruhr-Universität Bochum, Bochum, GERMANY
Hielscher, Andreas; SmartSim GmbH, Essen, GERMANY
Kleppek, Gerhard; Gascade Gastransport GmbH, Kassel, GERMANY
Schmidt, Roland; 1.4, Gase, PTB-Braunschweig
|
| Quelle/Jahr | (2021) |
| Schriftenreihe | Technical Report: PK 1-5-3 |
| URL | |
| Berichtsnummer | PK 1-5-3 |
| Verlag | Bonn: DVGW, Deutscher Verein des Gas- und Wasserfaches e.V. |
| Freie Schlagworte | natural gas ; hydrogen ; gas metering ; equation of state ; volume correction ; compressionfactor ; gas law deviation factor |
| Zusammenfassung | In this paper, the SGERG-88 equation is modified in such a way that the calculation of compression factors and gas law deviation factors is possible for natural gases with higher admixture of hydrogen (see section 3.1). One of the measures to achieve this, is suppressing the so called "CO correction". This modified version is termed "SGERG-mod-H2". In chapter 4, the equations of state SGERG-88, SGERG-mod-H2, AGA8, and GERG-2008 are compared in detail with experimental compression factors of mixtures containing hydrogen. Furthermore, in chapter 5, a comparison of the different equations of state is given for 5 different natural gases with admixtures of hydrogen between 0 % and 100 mol %. The analysis of these data leads to the following conclusions: The equation of state "SGERG-mod-H2" is suitable for the calculation of natural gases with admixtures of up to 100 mol-% H2. At pressures up to 50 bar, the deviations from the measured values, as well as from the equation GERG-2008 are less than ± 0.1 %. For higher pressures up to 100 bar, deviations of up to ±0.5 % might occur. Although the equation can theoretically be applied to hydrogen concentrations of up to 100 mol%, numerical problems can occur at very high concentrations of H2. Therefore, it is recommended to limit the application range to 30 mol-% H2 in part 6 of the DVGW G685 [1]. For the equation SGERG-88, for a hydrogen content of up to 10 mol-% and pressures up to 50 bar, an uncertainty of 0.1 % can be expected. The AGA8 equation and the GERG-2008 equation generally agree better than ± 0.1% for the measured values for all data sets in the entire pressure range. It can thus be expected that these equations of state can be used for any desired H2 fractions without significantly affecting the underlying 0.1% uncertainty of the equations. |
| Themenbereich der Metrologie | Durchfluss |
Zitierung
Schley, P., Nguyen, T.-T.-G., Span, R., Hielscher, A., Kleppek, G., Grinten, J. V. D., Schmidt, R., & Sarge, S. M. (2021). Calculation of compression factors and gas law deviation factors using the modified SGERG-Equation SGERG-mod-H2 (Report No. PK 1-5-3). Bonn: DVGW, Deutscher Verein des Gas- und Wasserfaches e.V.