Fluid flow controlling

G - Physics – 05 – D

Patent

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Details

G05D 7/06 (2006.01)

Patent

CA 2346261

A method and system for controlling the rate of fluid flow. A flow restrictor (28) having known pressure drop and flow rate characteristics provided in a passage (26) through which the fluid, preferably a gas, flows. An upstream pressure sensor (14) determines the pressure of fluid in the flow passage (26) upstream of the flow restrictor (28). A downstream pressure sensor (16) determines the pressure of fluid in the flow passage (26) downstream of the flow restrictor (28). A pressure regulator adjusts the pressure of fluid upstream or downstream of the flow restrictor (28) based on the pressure drop across the flow restrictor (28) so that theactual pressure drop across the flow restrictor (28) closely corresponds to the pressure drop associated with a desired rate of fluid flow.

L'invention concerne un procédé et un système permettant de réguler le débit de fluide. Un limiteur de débit (28), de chute de pression et de caractéristiques de débit connues, est placé à l'intérieur d'un passage (26) à travers lequel le fluide, de préférence du gaz, s'écoule. Un capteur de pression (14) en amont détermine la pression du fluide dans ledit passage (26) en amont du limiteur de débit (28). Un capteur de pression (16) en aval détermine la pression du fluide dans le passage (26) d'écoulement en aval dudit limiteur (28). Un régulateur de pression règle la pression en amont ou en aval du limiteur de débit (28), en fonction de la chute de pression enregistrée à travers le limiteur de débit (18), la chute de pression effective à travers le limiteur de débit (28) correspondant ainsi étroitement à la chute de pression associée à un débit de fluide souhaité.

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