| Zugriffsnummer | 17081 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | GERG project: development and set-up of a new reference calorimeter |
| Autor(in); Institution |
Jaeschke, Manfred; E.ON Ruhrgas AG, GERMANY
Forster, R.; E.ON Ruhrgas AG, GERMANY
Schmücker, A.; E.ON Ruhrgas AG, GERMANY
Pramann, Axel; 3.2, Analytische Messtechnik und Druck, PTB-Braunschweig
Ulbig, Peter; 3.2, Analytische Messtechnik und Druck, PTB-Braunschweig
Haloua, F.; Laboratoire National d'Essais, FRANCE
Hay, B.; Laboratoire National d'Essais, FRANCE
Le Sant, V.; Laboratoire National d'Essais, FRANCE
Loubat, S.; Gaz de France, FRANCE
Laguerre, D.; Gaz de France, FRANCE
Benito, A.; Enag.aacute.s, SPAIN
Cremonesi, P. L.; Snam Rete Gas, ITALY
|
| Quelle/Jahr | 2004 International Gas Research Conference: program/registration:(2004), 1 - 21 |
| Verlag | [s.l.]: |
| Konferenzangaben | 2004 International Gas Research Conference, Vancouver, 01-04, November, 2004, Canada |
| Freie Schlagworte | adiabatic temperature rise ; calorific value ; calorimeter ; energy ; natural gas ; traceability ; uncertainty |
| Zusammenfassung | Natural gas plays an important role in world energy supply. For billing purposes the precise metering of volume and superior calorific value is very important. At present, only a few institutions world-wide are able to determine the superior calorific value (SCV) of gases with an uncertainty of less than 0.2%. For calculations of the SCV of natural gases, the data provided by ISO 6976 are used; for methane the uncertainty given is at least 0.1%. For this reason a GERG (Groupe Européen de Recherches Gazières) project was set up to develop and build a new reference calorimeter for determining the SCV of flammable gases (natural gases), based on the principle of a Rossini calorimeter. The purpose of such a reference calorimeter is to determine thr SCV of pure gases and gas mixtures with an uncertainty of less than 0.05%. The overall uncertainty budget for the SCV to be measured is mainly influenced by mass determination and temperature measurement. A new automated weighing and calibration device with a gas container and compensation weights for the container and the combusted gas was developed. The gas container is permanently coupled to the calorimeter by a capillary. This experimental procedure leads to an uncertainty approx. 0.01% in the mass of the combusted gas. In addition to the experiment, the flow and temperature field in the calorimeter were simulated. These simulations help to reduce the combined uncertainty of the combustion and calibration experiments resulting from temperature measurement. The adiabatic rise was determined analytically. The assumptions made by early investigators were carefully reconsidered for the first time. Some contributions to the uncertainty of the adiabatic temperature rise are still under discussion. |
Zitierung
Jaeschke, M., Forster, R., Schmücker, A., Pramann, A., Ulbig, P., Haloua, F., Hay, B., Le Sant, V., Loubat, S., Laguerre, D., Benito, A., & Cremonesi, P. L. (2004). GERG project: development and set-up of a new reference calorimeter. 2004 International Gas Research Conference, Vancouver, 01-04, November, 2004, Canada.