Implementation of the dynamic flying start-stop method in the pVTt gas flow standard |
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| P. Žibret, G. Bobovnik, J. Kutin |
- Abstract:
- The gas flow standards using the volumetric method with a constant volume (pVTt) determine the flow rate based on the rate of mass change determined by measuring the density of the gas inside a constant volume. These standards normally use the static method of mass determination and rarely the dynamic one, due to dynamic changes of the gas temperature during mass collection. We have developed the analytical model that predicts the change of temperature in the pVTt system for gas flow rates up to 12 mg/min. Both measurement methods, the static and the dynamic, were implemented in the measuring system, with the dynamic method being corrected using the analytical model. The analytical correction model was validated by a comparison between the flow-rate measurements using the static and the dynamic methods. Based on successful validation of the analytical model we believe the corrected dynamic method is a viable alternative to the static one for the considered flow range.
- Keywords:
- pVTt method; Dynamic mass determination; Temperature correction model
- Download:
- IMEKO-TC9-2019-075.pdf
- DOI:
- 10.21014/tc9-2022.075
- Event details
- IMEKO TC:
- TC9
- Event name:
- FLOMEKO 2022
- Title:
19th International Flow Measurement Conference 2022
- Place:
- Chongqing, CHINA
- Time:
- 01 November 2022 - 04 November 2022