Method and apparatus for the measurement of the mass flow rates of fluid components in a multiphase slug flow

摘要

A method of measuring mass flow rates of liquid phases in a multiphase slug flow containing at least two liquid phases includes (i) passing a flow through a tube; (ii) detecting commencement of passage of a slug in the flow past a first location in the tube; (iii) measuring mass or volume fractions of the liquid phases by transmission of energy through the flow at the first location; (iv) detecting ending of the passage of the slug at the first location; and (v) determining mass flow rate of the liquid phases through the tube from (a) measuring the total mass or volume of liquid flowing through the tube and (b) measuring mass or flow fractions, only between detection of the commencement and the ending of passage of respective slugs in the flow, i.e., only while a slug is present at the measuring point.