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Abstract

A method for determining CO₂ mass flow rate of a multi-phase fluid flowing in a pipeline includes obtaining pressure signals from pressure sensors flush-mounted on the inner wall of the pipe that include a diaphragm for sensing pressure. The pressure signals determine a first time-of-flight of flow eddies and a second time-of-flight of sound waves. Using the first and second time-of-flight, bulk flow velocity and mixture speed of sound is determined. Static pressure sensors obtain a static pressure measurement and temperature sensors obtain a temperature measurement. The static pressure and temperature sensors are placed near the pressure sensors. A fluid composition sensor obtains fluid composition data. Based on the static pressure measurement, temperature measurement, and fluid composition data, single-phase fluid properties are determined. Based on the bulk flow velocity, mixture speed of sound, and single-phase fluid properties, CO₂ mass flow rate of the multi-phase fluid is determined.

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First Claim