Fluid flow measurement with phase-based diagnostics

摘要

A system comprises a differential pressure sensor, a process pressure sensor, a temperature sensor and a microprocessor. The differential pressure sensor is positioned to sense differential pressure along a fluid flow, where fluid properties of the fluid flow have first and second phases separated along a transition curve. The process pressure sensor is positioned to sense a pressure of the fluid flow, and the temperature sensor is positioned to sense a temperature of the fluid flow. The microprocessor is coupled to the temperature sensor and the pressure sensor to determine a flow rate, and the microprocessor generates a diagnostic based on the process pressure and the temperature as compared to the transition curve.

主权项

1. A system comprising:
a differential pressure sensor positioned to sense a differential pressure along a fluid flow, wherein fluid properties of the fluid flow have a first phase and a second phase separated from the first phase along a transition curve; a process pressure sensor positioned to sense a process pressure of the fluid flow; a temperature sensor positioned to sense a process temperature of the fluid flow; a microprocessor coupled to the differential pressure sensor, the process pressure sensor and the temperature sensor in order to determine a flow rate of the fluid flow; and a diagnostic module for generating a diagnostic based on the process pressure and the process temperature as compared to the transition curve; wherein the diagnostic characterizes the phase of fluid flow, and includes an indication of a potential for a phase transition.