Flow measurement system

Details Flow measurement system Flow measurement system

G - Physics

01

F

G01F 1/74 (2006.01) G01F 1/20 (2006.01) G01F 1/34 (2006.01) G01F 1/36 (2006.01) G01F 15/08 (2006.01) G01N 9/26 (2006.01)

Patent

CA 2130553

2130553 9317305 PCTABS00025 Apparatus for measuring multiphase fluid flows comprising first and second sections each comprising a flow passage having means for making a dynamic pressure measurement on the multiphase fluid flow therethrough, the geometry of the first and second sections differing so as to affect a relationship between void fraction and velocity for the phases in a known manner. The difference in geometry between the two sections can be in the area of the flow passages or in the direction of flow relation to gravity. A method of measuring multiphase flows comprising the steps of: a) directing the flow through a first flow passage including means for making a dynamic pressure measurement; b) measuring a pressure drop across said means; c) directing the flow through a second flow passage including means for making a dynamic pressure measurement; d) measuring a pressure drop across said means; and e) calculating the composition and flow rates of the phases from the measured pressure drops. The method optionally includes the further steps of directing the flow through a pair of passages and f) intermittently isolating one or other of said pair of passages to prevent flow therethrough; g) measuring at least one property of the fluid as the phases separate in the isolated passage.

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