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Title: Contaminant Accumulation Effects On Gas Ultrasonic Flow Meters
Author: Charles W. Derr Tina m. Newsome
Source: 2011 International School of Hydrocarbon Measurement
Year Published: 2011
Abstract: One of the most significant discussions in the gas ultrasonic flow meter industry centers around the effect of accumulation of contaminants on the accuracy of flow measurement and the performance of the gas ultrasonic flow meter (GUSM). The effects of contamination on a gas ultrasonic metering systems are believed to be less than that of other measurement devices. The increasing usage of ultrasonic metering warrants a more in-depth study of these effects and the symptoms and measurement errors that may result. There are three important factors to consider when evaluating contaminant effects. They are ultrasonic meter performance inclusive of the flow dynamics through them, total system operation and measurement financial impact. Factors such as these have a direct correlation to the operating expenses which are monitored closely by virtually all gas companies. High volume throughput of expensive gas means that small errors when ignored are potentially large sums of money that may be Lost. This discussion will help describe how that accuracy and operation of the gas ultrasonic meter are affected by the build up of contaminants. A real captured example is shown in Figure 1. below

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