Multiphase Coriolis flowmeter
First Claim
Patent Images
1. A method comprising:
- passing a fluid through a vibratable flowtube, the fluid including a gas phase and a liquid phase;
vibrating the flowtube, while the fluid is passed through the flowtube, using a driver connected to the flowtube and operable to impart motion to the flowtube;
receiving a sensor signal from a sensor while the flowtube is vibrated, the sensor being coupled to the flowtube and configured to sense the motion of the flowtube and generate the sensor signal;
accessing data related to a void fraction of the fluid;
determining a mixture density of the fluid based on the accessed data related to the void fraction; and
determining a first flow rate of the gas phase based on the determined mixture density and the received sensor signal or a second flow rate of the liquid phase based on the determined mixture density and the received sensor signal.
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Abstract
A flowmeter is disclosed. The flowmeter includes a vibratable flowtube, and a driver connected to the flowtube that is operable to impart motion to the flowtube. A sensor is connected to the flowtube and is operable to sense the motion of the flowtube and generate a sensor signal. A controller is connected to receive the sensor signal. The controller is operable to determine a first flow rate of a first phase within a two-phase flow through the flowtube and determine a second flow rate of a second phase within the two-phase flow.
120 Citations
24 Claims
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1. A method comprising:
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passing a fluid through a vibratable flowtube, the fluid including a gas phase and a liquid phase; vibrating the flowtube, while the fluid is passed through the flowtube, using a driver connected to the flowtube and operable to impart motion to the flowtube; receiving a sensor signal from a sensor while the flowtube is vibrated, the sensor being coupled to the flowtube and configured to sense the motion of the flowtube and generate the sensor signal; accessing data related to a void fraction of the fluid; determining a mixture density of the fluid based on the accessed data related to the void fraction; and determining a first flow rate of the gas phase based on the determined mixture density and the received sensor signal or a second flow rate of the liquid phase based on the determined mixture density and the received sensor signal. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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2. A flowmeter transmitter comprising:
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at least one processing device; and a storage device, the storage device storing instructions for causing the at least one processing device to; vibrate a flowtube using a driver while a fluid including a gas phase and a liquid phase is passed through the flowtube, wherein the driver is connected to the flowtube and operable to impact motion to the flowtube; receive a sensor signal from a sensor while the flowtube is vibrated, wherein the sensor is connected to the flowtube and is configured to sense motion of the flowtube and generate the sensor signal; access data related to a void fraction of the fluid; determine a mixture density of the fluid based on the accessed data related to the void fraction; and determine a first flow rate of the gas phase based on the determined mixture density and the received sensor signal or a second flow rate of the liquid phase based on the determined mixture density and the received sensor signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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3. A flowmeter comprising:
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a vibratable flowtube, the flowtube containing a fluid, the fluid including a gas phase and a liquid phase; a driver connected to the flowtube and configured to impart motion to the flowtube such that the flowtube oscillates; a sensor connected to the flowtube and configured to sense the motion of the flowtube and generate a sensor signal; and a controller configured to; vibrate the flowtube using the driver while the fluid is passed through the flowtube; receive the sensor signal from the sensor while the flowtube is vibrated; access data related to a void fraction of the fluid; determine a mixture density of the fluid based on the accessed data related to the void fraction; and determine a first flow rate of the gas phase based on the determined mixture density and the received sensor signal or a second flow rate of the liquid phase based on the determined mixture density and the received sensor signal. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification