Title :
The zero flow performance of a sing-around type flow meter
Author_Institution :
Dept. of Heat & Power Eng., Lund Inst. of Technol., Sweden
Abstract :
Design considerations were taken to correct for the speed of sound influences and reciprocity effect. The meter was tested using from 1000 to 20000 sing-around loops. To investigate averaging phenomena, 1-100 primary velocity values were averaged to form one velocity value. The temperature range tested was 2-45°C, with measurements at 5°C intervals. The measurements show a zero flow stability of better than ±0.6 mm/s (±1 l/h, φ 25-mm pipe) in the entire temperature range. The standard deviation at each temperature tested was less than 0.45 mm/s. This implies that flow velocities as low as 6 cm/s (100 l/h, φ 25-mm pipe) could be measured with an accuracy of better than ±1%. The tests were made with water as the medium
Keywords :
flowmeters; ultrasonic equipment; ultrasonic velocity measurement; 2 to 45 degC; primary velocity values; sing-around type flow meter; water medium; zero flow performance; Acoustic transducers; Fluid flow measurement; Stability; Temperature distribution; Testing; Turbines; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171625