Coriolis and Differential Pressure Flowmeter for Wet Gas Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coriolis flowmeters face inaccuracies when measuring multi-phase process fluids, particularly wet gases, due to assumptions of single-phase flow, leading to errors in bulk density and mass flowrate measurements.
Innovation Solution
A combination of a Coriolis flowmeter and a differential pressure flowmeter, such as an orifice plate, is used to determine apparent properties, which are then corrected using a neural network to calculate phase-specific properties like mass flowrates of constituent phases, accounting for multi-phase flow conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a Coriolis flowmeter is used to measure multi-phase process fluids, then mass flowrate and bulk density measurements are obtained, but measurement precision deteriorates due to assumptions of single-phase flow
Solution Approach 1:
The measurement system is segmented into multiple independent measurement devices: a Coriolis flowmeter for bulk measurements and a differential pressure flowmeter for phase-specific measurements. Each device operates independently to measure different aspects of the multi-phase flow, allowing the system to overcome the limitations of single-phase assumptions in Coriolis measurements.
Solution Approach 2:
The measurement system is enhanced to perform multiple functions by combining a Coriolis flowmeter (providing bulk mass flowrate and density) with a differential pressure flowmeter (providing phase-specific flow information). This multi-functional approach enables accurate measurement of both bulk properties and phase-specific properties in multi-phase flows.
2Measurement precision
If a combination of Coriolis flowmeter and differential pressure flowmeter is used, then phase-specific property measurements are improved, but device complexity increases
Solution Approach 1:
Two different flowmeter technologies (Coriolis and differential pressure) are merged into a single integrated measurement system. The Coriolis flowmeter provides bulk mass flowrate and density measurements while the differential pressure flowmeter provides phase-specific flow information. By combining these measurements and processing them together, the system achieves accurate phase-specific property measurements that neither device could provide alone.
Data Source
AI summary
A first apparent property of a multi-phase process fluid is determined based on the motion of the vibratable flowtube. One or more apparent intermediate values associated with the multi-phase process fluid are determined based on the first apparent property. A measure of wetness of the multi-phase process fluid is determined based on a mapping between one or more of the apparent intermediate values and the measure of wetness. A second apparent property of the multi-phase process fluid is determined using the differential pressure flowmeter. One or more phase-specific properties of the multi-phase process fluid is determined based on the measure of wetness and the second apparent property.