Friction Loss Differential Pressure Flow Rate Measurement
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Solution Overview
Problem
Existing flow meters, such as magnetic, ultrasonic, and differential pressure flow meters, face challenges in accurately measuring liquid phase flow rates without disturbing the fluid flow and have high installation costs or low accuracy.
Innovation Solution
A method and apparatus for friction loss-based differential pressure flow rate measurement, which involves receiving pipe information, calculating physical properties of the fluid, and obtaining parameters related to pressure loss in both routes with and without installed apparatus, to output the flow rate using a processor and memory system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic flow meter is used to measure flow rate with high accuracy, then measurement precision is improved, but device complexity and installation cost increase due to the magnetic field apparatus
Solution Approach 1:
The patent extracts the measurement function from complex magnetic or ultrasonic apparatus and implements it using simple pressure sensors and computational algorithms. The flow rate measurement is achieved by measuring pressure differential and calculating based on fluid dynamics equations, removing the need for magnetic field generators or ultrasonic transducers.
Solution Approach 2:
The patent replaces magnetic field-based measurement (electromagnetic principle) with pressure-based measurement (mechanical principle). Instead of using magnetic flow meters that require complex electromagnetic apparatus, the system uses simple pressure differential measurement combined with computational fluid dynamics to achieve accurate flow rate measurement.
2Ease of operation
If an ultrasonic flow meter is used for easy installation, then ease of operation is improved, but measurement precision deteriorates and unit cost increases
Solution Approach 1:
The patent removes the ultrasonic transducers and signal processing apparatus from the measurement system. Instead, it uses simple pressure sensors that are easy to install and combines them with computational algorithms to achieve both ease of installation and high measurement accuracy.
3Ease of manufacture
If a differential pressure flow meter is used to reduce unit cost, then manufacturing cost is reduced, but measurement precision deteriorates and installation complexity increases due to additional apparatus in the pipe
Solution Approach 1:
The patent replaces the mechanical differential pressure measurement system (requiring orifice plates, venturi tubes, or other flow restriction apparatus) with a computational system. Pressure sensors measure pressure differential, and a processor uses fluid dynamics equations to calculate flow rate, eliminating the need for physical flow restriction devices and their associated installation complexity.
4Device complexity
If additional apparatus is installed in the pipe to enable differential pressure measurement, then device complexity is reduced for cost reasons, but fluid flow is disturbed and installation difficulty increases
Solution Approach 1:
The patent extracts the flow restriction apparatus (orifice plates, venturi tubes, etc.) from the measurement system. The measurement is performed using pressure sensors mounted on existing pipe sections without requiring any modifications to the pipe geometry or installation of flow restriction devices.
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 approach enhances the convenience of installation by accurately measuring flow rates without disturbing fluid flow, improving measurement accuracy and reducing costs by using a system that calculates flow rates based on pressure loss coefficients and friction coefficients.
Implementation Method 1
The measurement sensor may include a pressure gauge configured to measure the pressure of the fluid
Implementation Method 2
a thermometer configured to measure the temperature of the fluid
Implementation Method 3
a control state measuring instrument configured to measure the control state of the apparatus installed inside or outside the pipe
Implementation Method 4
calculating physical properties of the fluid based on the pipe information
Implementation Method 5
obtaining a first parameter related to pressure loss of the fluid that occurs in a first passing route in the pipe
Data Source
AI summary
Provided are a method, an apparatus, and a parameter training method for friction loss-based differential pressure flow rate measurement. The method includes receiving pipe information on a pipe through which fluid passes from a measurement sensor installed on the pipe, calculating physical properties of the fluid based on the pipe information, obtaining a first parameter related to pressure loss of the fluid that occurs in a first passing route in the pipe, obtaining a second parameter related to pressure loss of the fluid that occurs in a second passing route in the pipe, and outputting a flow rate of the fluid based on the pipe information, the physical properties of the fluid, the first parameter, and the second parameter.