The high pressure sonic nozzle gas flow standard facility in NIM |
|---|
| Chunhui Li, Bodo Mickan, Lishui Cui, Chi Wang |
- Abstract:
- The high pressure sonic nozzle gas flow facility in China was built in NIM at the end of 2014. There were 16 sonic nozzles used as the reference meters in the facility. The flow range is within (2~400) m³/h, while the pressure range is within the (190~2500) kPa. The sonic nozzles were traceable to the pVTt primary standard facility in NIM. To cover the pressure range, the curve fitting between discharge coefficient and Reynolds number was made for each sonic nozzle. To decrease pressure measurement uncertainty, there is an absolute pressure instrument in the manifold in the upstream of the MUT. The expanded uncertainty of meter factor for meter under test (MUT) is 0.15% (k = 2). To verify the uncertainty of the sonic nozzle facility, a comparison between NIM and PTB was made with three Dn 100 turbine meters as transfer meters. The three turbine meters were calibrated by PTB in 2013 with natural gas, which were calibrated in NIM in 2016 and recalibrated in 2017~2018 with dry air. On the base of the good consistency of the comparison results, the uncertainty and the measurement capability of the sonic nozzle facility were verified.
- Download:
- IMEKO-TC9-2019-020.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC9
- Event name:
- FLOMEKO 2019
- Title:
18th International Flow Measurement Conference 2019
- Place:
- Lisbon, PORTUGAL
- Time:
- 26 June 2019 - 28 June 2019