Wet gas indication using a process fluid differential pressure transmitter
AssigneeRosemount Inc.
InventorsDavid Wehrs, Russell Evans, Ghidewon Arefe
Life of this patent
Estimating the term…
Abstract
A process pressure fluid transmitter is coupled to a differential pressure producer and measures a differential pressure across the producer. A statistical parameter is calculated upon successive differential pressure indications, and the calculated parameter is used to indicate wet gas flow. The indication can be generated locally at the process pressure transmitter, communicated via a wired process communication loop, communicated wirelessly, or any combination thereof.
Claims22
A process fluid pressure transmitter for providing an indication of a change in liquid volume fraction in a multiphasic process fluid flow, the pressure transmitter comprising:
- a differential pressure sensor operably coupleable to a differential pressure generator within a process fluid flow conduit;
- measurement circuitry coupled to the differential pressure sensor to provide successive indications relative to an electrical characteristic of the differential pressure sensor;
- and
- a controller operably coupled to the measurement circuitry, the controller being configured to calculate a parameter based upon the successive indications relative to the electrical characteristic, and to selectively provide an indication of a change in liquid volume fraction within the multiphasic process fluid flow based upon the parameter.
A method of diagnosing a change in liquid volume fraction of a multiphasic process fluid, the method comprising:
- obtaining a baseline statistical parameter with respect to differential pressure across a differential pressure generator disposed in the process fluid operating at a normal condition;
- measuring a plurality of successive differential pressures;
- computing, using circuitry disposed within a differential pressure transmitter, a statistical parameter of the plurality of successive differential pressures;
- and
- selectively generating an indication of liquid volume fraction change based upon a comparison of the computed statistical parameter with the baseline statistical parameter.
Dependencies are inferred from the claim text.