کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
708755 | 1461098 | 2014 | 6 صفحه PDF | دانلود رایگان |
• The calibration facility is developed for high-pressure hydrogen gas flow measurements.
• The calibration facility maintains traceability to the national standard.
• The developed calibration facility is capable of calibrating flow rate of 550 g/min at maximum with relative standard uncertainty of 0.09%.
• Relative standard uncertainty of flow rate measured by the Coriolis flow meter is about 0.91%.
The calibration facility with the multi-nozzle calibrator was developed for the calibration of flow meters to be used with high-pressure, high-flow-rate hydrogen gas. The critical nozzles installed in the multi-nozzle calibrator were calibrated with traceability to the national standard. The relative standard uncertainty of the mass flow rates produced from the calibration facility is 0.09% when the flow rate is between 150 g/min and 550 g/min. In this study, the Coriolis flow meter was calibrated for a pressure range of 15–35 MPa. The relative standard uncertainty of the flow rates obtained from the Coriolis flow meter was 0.44% for the case of the worst fluctuations in the output of the flow meter; based on the calibration curve, this is 0.91%. The present result shows that there is a maximum 3% difference between the output of the Coriolis flow meter and the mass flow rates of the multi-nozzle calibrator, even though the Coriolis flow meter was calibrated using water. Therefore, for the development of a calibration facility that can calibrate a flow meter under the same conditions as those encountered in actual use, it will be important to develop a new flow meter.
Journal: Flow Measurement and Instrumentation - Volume 39, October 2014, Pages 19–24