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Title: An Innovative Technology For Coriolis Metering Under Entrained Gas Condition
Author: H. Zhu A. Rieder Y.Lin
Source: Flomeko 2016
Year Published: 2016
Abstract: Coriolis mass flow meter s are usually only used for single - phase fluids, i.e. either liquids or gases, since it has been found that their accuracies can be affected by two - phase flows, e.g. the existence of entrained gas in a liquid flow. It is now known that there are various error sources, among which the significantly increased compressibility due to the gas entrainment brings the most difficulty to the fi eld applications of Coriolis meters. The authors developed a new generation of Coriolis sensor together with an innovative technology, Multi Frequency Technology (MFT), which can compensate the measurement errors introduced by the elevated compressibility of an entrained gas flow. The new Endress+Hauser Coriolis sensor provides a novel hardware platform so that a higher natural mode of the measuring tube can be reliably excited, in addition to the basic working mode. Being driven at different frequencies, t he same two phase fluid in the measuring tube can have different influences on the primary mode (i.e. the basic working mode) and the auxiliary mode (i.e. the higher tube mode).

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