Vibratory Meter Pressure Compensation for Flow Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vibratory meters experience pressure drops due to reversible and irreversible factors, affecting the accuracy of fluid flow parameter measurements, and there is a need for pressure compensation to improve measurement precision.
Innovation Solution
A method and system for pressure compensation in vibratory meters that involves measuring pipeline pressure values to calculate a pressure-compensated fluid flow parameter using equations that account for permanent and dynamic pressure losses, conduit dimensions, and fluid velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the fluid velocity in the conduit is increased to improve measurement response, then the measurement speed is improved, but the pressure drop increases causing measurement error
Solution Approach 1:
The patent introduces an intermediary calculation process that uses measured pipeline pressure values along with conduit dimensions and fluid velocity to compute a compensated pressure value. This intermediary calculation serves as a mediator between the raw measurement and the final compensated value, eliminating the need for direct physical pressure measurement at the conduit while correcting for pressure drop effects.
Solution Approach 2:
The patent replaces the mechanical approach of directly measuring pressure at the conduit with a computational approach. Instead of using a physical pressure sensor at the measurement location, the system substitutes a calculation-based method that uses readily available parameters (pipeline pressure, conduit dimensions, fluid velocity) to determine the compensated pressure effect on the measurement.
2Measurement precision
If a pressure sensor is installed at the conduit to directly measure pressure for compensation, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent makes the existing pipeline pressure measurement serve multiple functions. The same pressure value is used both for monitoring pipeline conditions and for compensating the fluid flow parameter measurement. This multi-functional use eliminates the need for a dedicated pressure sensor at the conduit, reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The patent creates a computational model that replicates the pressure conditions at the conduit based on measurements taken at the pipeline. Instead of directly measuring the difficult-to-access conduit pressure, the system creates a calculated copy of this pressure value using readily measurable parameters, thereby avoiding additional hardware complexity.
3Measurement precision
If the conduit diameter is reduced to minimize pressure loss, then the measurement sensitivity is improved, but the reversible pressure drop increases affecting measurement accuracy
Solution Approach 1:
The patent converts the harmful effect of reversible pressure drop into a beneficial correction factor. By calculating the dynamic pressure drop based on fluid velocity and conduit dimensions, the system uses this previously harmful effect as information to compensate the measurement, thereby transforming the problem into a solution.
Solution Approach 2:
The patent changes the approach from trying to eliminate pressure drop effects to using parameter-based compensation. By measuring or calculating key parameters (fluid velocity, conduit diameter, pipeline pressure) and using these to compute a compensation factor, the system adapts to the pressure drop conditions rather than attempting to prevent them, thereby maintaining measurement sensitivity while correcting for pressure effects.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the accuracy of fluid flow parameter measurements by reducing errors caused by pressure drops, providing precise mass flow rate and density calculations.
Implementation Method 1
The sensor assembly typically includes one or more conduits, which may be referred to as flow tubes, that vibrate to measure the one or more fluid parameters
Implementation Method 2
the fluid in the conduit may experience an increase in fluid velocity, which can cause a corresponding reversible or dynamic pressure drop
Implementation Method 3
There may also be corresponding pressure losses or irreversible pressure drops due to friction, turbulence, or the like
Implementation Method 4
There may also be corresponding pressure losses or irreversible pressure drops due to friction, turbulence, or the like
Data Source
AI summary
A method of pressure compensation of a fluid flow parameter is provided. The method comprises receiving a measured pipeline pressure value of a fluid in a pipeline, and determining, based on the measured pipeline pressure value, a pressure for determining a pressure compensated fluid flow parameter value.