INDUSTRIAL APPLICATION EXPERIENCES OF NEW TYPE FLOW- METERING SYSTEM BASED ON ULTRASONIC-DOPPLER FLOW VELOCITY-PROFILE MEASUREMENT

Velocity-profile measurement by ultrasonic-Doppler method has recently much advanced for fluid flow measurement; however, the actual application is in uncharted territory for high temperature/pressure and high velocity fluid in thick and large industrial piping. The measurement tests of the flow rate using ultrasonic-Doppler flow velocity-profile measurement were carried out at the test loops in NIST (National Institute of Standard and Technology of the United States), NMIJ (National Metrology Institute of Japan), and industrial piping of ~400 mm in diameter. The tests showed errors of ~0.2 % for NIST and ~0.4 % for NMIJ. 1