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Title: Studies Related To Gas Metering Accuracy In Natural Gas Vehicle Filling Stations
Author: George Vradis, Volkan Otugen, Florin Girlea
Source: 1995 International Symposium on Fluid Flow Measurement
Year Published: 1995
Abstract: The present study concentrates on the identification of parameters affecting the metering accuracy in Natural Gas Vehicle (NOV) fueling stations. The results of an on-site monitoring program designed to establish the effect of vibrations and pressure pulsations on the operation of mass flow and rotary positive displacement meters are presented. It is established that pressure fluctuations due to mean flow pulsations are weak in the immediate vicinity of the meters and, based on available experimental results, are not expected to have any impact on meter accuracy. However, vibrations in the operating environment of coriolis mass flow meters are shown to have potentially strong influence on their accuracy. Also, an analysis of available experimental data is performed to identify the source of instabilities observed in the output signal of coriolis mass flow meters. It is shown that such instabilities could be the result of hydrodynamic phenomena that need to be studied further.