SYSTEM TO MEASURE DENSITY, SPECIFIC GRAVITY, AND FLOW RATE OF FLUIDS, METER, AND RELATED METHODS

摘要

A system (30) to measure fluid flow characteristics in a pipeline, meter, and methods includes a pipeline (3 1) having a passageway (3 7) to transport flowing fluid (4 1) therethrough, a process density meter (33) including at least portions thereof positioned within the pipeline (3 1) to provide flowing fluid characteristics including volumetric flow rate, fluid density, and mass flow rate of the flowing fluid (41), and a fluid characteristic display (35) to display the fluid characteristics. A process density meter (33) includes a vortex-shedding body (63) positioned within the pipeline (3 1) to form vortices and a vortex meter (65) having a vortex frequency sensor (103) to measure the frequency of the vortices and to determine the volumetric flow rate. The process density meter (33) further includes a differential pressure meter (84) positioned adjacent the vortex-shedding body (63) to produce a differential pressure meter flow rate signal indicative of the density of fluid (40) when flowing through the pipeline (3 1). The process density meter (89) also includes a thermal flow meter (43) positioned adjacent the vortex-shedding body (63) to produce a mass flow rate signal indicative of the mass flow rate of fluid (41) when flowing through the pipeline (3 1). The process density meter (89) produces an output of a volumetric flow rate, a flowing fluid density, and a mass flow rate to be displayed by the fluid characteristic display (35).