国家標準のための石油流量計校正設備の開発(流体工学,流体機械)

概要

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A new primary standard for hydrocarbon flow measurements has been constructed at NMIJ, National Metrology Institute of Japan. The facility had been designed for the calibration of hydrocarbon flowmeters in the flow rate range between 3 and 300m^3/h. An expanded uncertainty is estimated to be 0.03% for volumetric flow rate and 0.02% for mass flow rate (coverage factor: k=2). The primary standard is based on a static and gravimetric method with flying start and finish. The facility consists of two test rigs with kerosene and light oil as working fluid. The test lines for flowmeters are 50, 100 and 150mm in diameter and three servo PD meters are used as working standards. To verify the calibration performance, a coriolis flowmeter, a turbine meter and an positive displacement flowmeter have been calibrated at the both test rigs. Furthermore, an international comparison with SP, Swedish National Testing Research Institute, had been carried out. A screw-type positive displacement flowmeter was selected as the transfer standard and was calibrated at NMIJ and SP. The result shows that the two national standards at the two institutes agree within the quoted expanded uncertainties.
社団法人日本機械学会の論文
2005-03-25