REALISATION OF COMPACT METERING RUNS WITH ULTRASONIC GAS FLOW METERS AND REDUCING MEASUREMENT UNCERTAINTY

Koen H. Commissaris, Geeuwke de Boer

Abstract

This paper presents the results of the application of an ultrasonic gas flow meter in combination with a flow conditioner. This development aims at both reducing measurement uncertainty and the possibility of realising compact (short) metering runs, requiring less investment in piping and installation while maintaining good accuracy.<BR />For this purpose a package of a four-path ultrasonic gas flow meter with inlet pipe section and a modified Spearman (NEL) design flow conditioner placed at 3D upstream of the meter was found to be a good combination for reducing variability in the flow profile. This set-up was extensively tested at the Ruhrgas test facility in Lintorf.<BR />The test results demonstrate that combining an ultrasonic gas flow meter with a flow conditioner improves measurement uncertainty (due to installation e ffects) and reduces the required straight inlet of the ultrasonic meter by 50%, offering the potential of a compact installation.

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IMEKO-TC9-2003-039.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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