Design and calibration of critical flow Venturi nozzles for high-pressure hydrogen applications
Abstract
In this paper, we present the strategy behind the design and manufacture of sets of Critical Flow Venturi Nozzles (CFVN) with various sizes, shapes and surface roughnesses, as well as their dimensional calibration to test the applicability of ISO 9300 for high-pressure hydrogen aplications. Some of the built nozzles and nozzle holders will be used for high-pressure measurements with hydrogen and underwent a baseline metrological check at lower pressure using inert gases to ensure that their low-pressure characteristics are known before performing the measurements with high-pressure hydrogen. Furthermore, all the nozzles are being dimensionally calibrated using an ultra-precise 3D coordinate measuring machine and will yield a database of reference data for these nozzles. As there are currently no test rigs with traceable standards that are able to directly perform the calibration of CFVN with high-pressure hydrogen, an alternative method needed to be developed and a traceability scheme with an expected uncertainty around 1 % using a calibrated Coriolis meter with hydrogen is presented.
Event details
- Event
- FLOMEKO 2022
- Technical Committee
- TC9
- lich@nim.ac.cn
- Place
- Chongqing, CHINA
- Time
- 1 November 2022 - 4 November 2022
- Website
- http://flomeko2022.msmk.tech/c/index.html