Energy Correlation Flow Meter Calibration

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Solution Overview

Problem

Existing flowmeter calibration methods rely on iterative processes and viscosity-dependent calculations, leading to measurement uncertainties and the need for dedicated flow computers.

Innovation Solution

The energy correlation method calculates flow rate by correlating changes in potential and kinetic energy, eliminating the need for viscosity calculations and iterative processes, and allowing for simpler flowmeter designs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional discharge coefficient methods are used, then flow rate can be calculated, but measurement uncertainty increases due to iterative processes and viscosity-dependent calculations

Engineering Contradiction:

Improveflow rate measurement accuracyVSAvoidcalculation complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent changes the calculation parameters from viscosity-dependent discharge coefficient methods to density-dependent energy correlation methods. By using measurable parameters (pressure, temperature, density) directly in the energy correlation equation, the method eliminates iterative calculations and reduces measurement uncertainty while maintaining accuracy.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the complex iterative mechanical calculation system with a direct energy correlation approach. Instead of using iterative discharge coefficient methods requiring flow computers, the invention uses a direct calculation based on energy principles that can be implemented with simpler electronics or even analog devices.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If dedicated flow computers with complex algorithms are used, then flow rate calculation is possible, but device complexity and cost increase

Engineering Contradiction:

Improveflow rate calculation capabilityVSAvoidflow computer requirement

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the complex flow computer and iterative algorithms from the flow measurement system. By formulating the calculation as a direct energy correlation equation, the invention removes the need for dedicated flow computers while maintaining the ability to calculate flow rate from basic pressure and density measurements.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces expensive, complex flow computers with simpler, potentially disposable electronic calculation devices. The energy correlation method allows flow rate calculation using basic microcontrollers or even analog circuitry, eliminating the need for expensive dedicated flow computers while maintaining accuracy.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Productivity

If viscosity values are assumed for all flowing conditions, then Reynolds number can be calculated, but measurement uncertainty increases

Engineering Contradiction:

Improvecalculation speedVSAvoidflow rate accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent changes the approach from assuming fixed viscosity values to using measured or calculated density values. By basing the calculation on density (which can be directly measured or calculated from temperature and pressure) rather than viscosity (which requires assumptions), the invention improves accuracy without sacrificing calculation speed.

Inventive Principle:

Principle #35Parameter changes

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

This method reduces measurement uncertainty, eliminates the need for complex algorithms and dedicated flow computers, and provides more accurate flow rate calculations across different fluids and conditions.

Implementation Method 1

The energy correlation method of calculating flow rate is based on laws of physics of conservation of energy and conservation of mass

Methodology Applied

Scientific EffectConservation of energy:

Implementation Method 2

The energy correlation method of calculating flow rate is based on laws of physics of conservation of energy and conservation of mass

Methodology Applied

Scientific EffectConservation of mass:

Implementation Method 3

including the influences of meter orientation on potential energy

Methodology Applied

Scientific EffectPotential energy:

Implementation Method 4

the expansibility effect of compressible fluids on kinetic energy at relatively high flow rates resulting in changes in flowing density at the locations of the pressure taps

Methodology Applied

Scientific EffectExpansibility effect:

Data Source

PatentUS12241771B2Energy correlation flow meters

Publication Date: 2025.03.04 BELL TECH LLC

AI summary

A method for calibrating flow meters measuring fluid passing through a pipe wherein fluid pressures are detected and used to determine a volume or mass flow rate using an energy correlation calculation. The energy correlation calculation equates a change in potential energy for the flowing fluid with a change in kinetic energy for the flowing fluid. The energy correlation method of calculating flow rate offers lower measurement uncertainty than calculating flow by the Reynolds number versus discharge coefficient method.