| 摘要 |
A method for determining the flow rates of a fluid comprising a multi-component mixture of a gas and at least one liquid in a pipe, the method comprising the following steps: a. the permittivity of the multi-component mixture is determined based on an electromagnetic measurement, b. a statistical parameter related to the electromagnetic measurement is calculated, c. the density of the multi-component is determined, d, the temperature and pressure are obtained, e. based on the knowledge of densities and dielectric constants of the components of the fluid mixture, and the result from the above steps a-c, the water fraction of the multi- component mixture is calculated, characterized by a method for determining the liquid fraction and flow rates of the multi-component mixture where f. the liquid fraction is calculated based on the statistical parameter from step b and the calculated water fraction from step e using an empirical derived curve„ g. the velocity of the multi-component mixture is derived, and h. based on the step a-g, the flow rate of the individual components of the multi- component mixture is calculated. An apparatus for performing the method is also disclosed. |
