Flowmeter Test System Pressure Loss Equalization
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Solution Overview
Problem
The existing flowmeter test systems face errors in flow rate measurement due to pressure losses differences in the circulation and electronic balance introduction paths, leading to inaccurate testing of the test target flowmeter.
Innovation Solution
A flowmeter test system is designed with a configuration where the pressure losses in the flow paths from the flow path switching part to the storage part and the measurement part are made equal, using identical pipe lengths and diameters or incorporating pressure loss mechanisms like orifices, and a control device to manage fluid flow through circulation, sub-storage, and measurement paths, ensuring consistent flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the three-way solenoid valve switches between the circulation path and the electronic balance introduction path, then the flow rate measurement can be performed, but the pressure loss differences cause flow rate errors
Solution Approach 1:
A flow rate correction value calculation unit is introduced as an intermediary component that calculates the difference between the flow rate measured by the electronic balance and the actual flow rate regulated by the needle valve. This correction value compensates for the measurement error caused by pressure loss differences, thereby improving measurement accuracy without requiring physical modification to the flow paths.
2Ease of operation
If different pressure losses occur in the circulation path and electronic balance introduction path, then the switching operation is simple, but the flow rate regulation becomes inaccurate
Solution Approach 1:
The system implements a feedback mechanism where the flow rate correction value is calculated based on the difference between the electronic balance measurement and the needle valve regulation. This feedback loop continuously compensates for pressure loss variations, ensuring accurate flow rate regulation while maintaining the simplicity of the switching operation.
Data Source
AI summary
A flowmeter test system that tests a test target flowmeter by flowing fluid through the test target flowmeter and measuring the fluid having flowed through the test target flowmeter by a measurement part different from the test target flowmeter is disclosed. The flowmeter test system includes, a storage part to store the fluid, a distribution flow path to distribute the fluid between the storage part and the test target flowmeter, a measurement part introduction path to be connected to the distribution flow path and introduce the fluid into the measurement part, and a flow path switching part to switch between the distribution flow path and the measurement part introduction path. A pressure loss in a flow path from the flow path switching part to the storage part and a pressure loss in a flow path from the flow path switching part to the measurement part are same.