Author :
Urata, Y. ; Freeke, J. ; Matson, J.E. ; Lynnworth, L.C.
Author_Institution :
Panametrics Japan Co., Tokyo, Japan
Abstract :
An ultrasonic mass flowmeter for steam generally must achieve high accuracy, ~1% of reading or better, despite application problems such as a hot medium, very low acoustic impedance compared to liquids, usually but not always turbulent, and potentially liquid-bearing. Flow is sometimes bidirectional. Flow velocity V can range from 30 cm/s to >Mach 0.1. Solutions for measuring the flow of dry or saturated steam are presented, which have operated (a) in the USA and in Holland for three years, without maintenance and (b) in about 100 locations in an auto manufacturing plant in Japan, without a significant pressure loss in the flowcell. TMAX was 340°C in the work in Holland
Keywords :
flowmeters; steam; ultrasonic measurement; ultrasonic transducers; 340 C; bidirectional flow; dry steam; high accuracy; hot medium; industrial flowmeter; piezoceramic transducer; saturated steam; steam flowmeters; turbulent medium; ultrasonic mass flowmeter; very low acoustic impedance; wetted transducers; Acoustic measurements; Area measurement; Density measurement; Fluid flow measurement; Impedance measurement; Noise measurement; Q measurement; Temperature; Ultrasonic transducers; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762209
