Method for measuring mass flow of a multi-component gas

Measuring and testing – Volume or rate of flow – Of selected fluid mixture component

Reexamination Certificate

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C073S204110

Reexamination Certificate

active

08042409

ABSTRACT:
This invention relates to a method of measuring mass flow of a first gas component in a gas consisting of one or more known gas components. Typically such methods assume that certain parameters were constant, such as the gas composition, pressure and/or temperature, and likewise the heat capacity, density, etc., of the gas were presumed to be such that they could be determined to have a constant value. However, it has been found that the determination of the mass flow is associated with a comparatively high degree of measurement uncertainty, when it is assumed that the parameters are constant. The core of the invention relies on this discovery and on a method wherein all of the gas parameters that are used in the determination of the mass flow of the first gas component and that may vary considerably as a function of the gas composition, pressure and/or temperature are determined continually.

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Tjugum, et al. (2002) “Multiphase flow regime identification by multibeam gamma-ray densiometry.” Meas. Sci. Technol. 13: 1319-1326.

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