ACCURACY ENHANCEMENT OF A COMBINED V/Z CLAMP-ON ULTRASONIC FLOW

Sejong Chun, Byung-Ro Yoon, Woong Kang, Hyu-Sang Kwon

Abstract

Ultrasonic flow metering with clamp-on type transducers is a promising method when portability in flow metering is necessary. Nevertheless, the clamp-on ultrasonic flow meter has low measurement accuracy as flow speed in the pipe decreases. If the two types of clamp-on ultrasonic flow paths, namely, Z-shaped and V-shaped ultrasonic paths, are combined, measurement accuracy can be increased because the metering output becomes robust. In the present study, the measurement accuracy of the combined clamp-on ultrasonic flow meter was within ±2 % at 50 m³/h, which was smaller than those of the Z-shaped and the V-shaped clamp-on ultrasonic flow meters at the same flow rate. This can provide an advantage for water resource management because a general guideline for the water resource management is less than ±2 %.

Keywords

clamp-on ultrasonic flow meter, V-shaped, Z-shaped

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IMEKO-TC9-2013-083.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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