【Q&A Question 171】2017.06.20
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This post was last edited by 955559 on 2017-7-21 23:09. [Q&A Question 171] June 20, 2017: On what principle does a differential pressure flow meter measure flow rate? The reference answer can be seen after responding; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) A differential pressure flow meter is based on the throttling principle of fluid flow; that is, it measures flow rate by utilizing the pressure difference generated when fluid flows through a throttling device. Scoring criteria: 2 Wealth points for incorrect attempts; 3–8 points for *incomplete* answers. 10 Wealth points for correct answers, provided with a detailed explanation; 15–20 Wealth points if the answer is correct but lacks sufficient details. Please score according to these criteria. Note: If there are editing records after answering, only points will be awarded to those who participated. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have no relation to the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updating now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (fully updated) http://bbs.hcbbs.com/thread-1597792-1-1.html
Based on Bernoulli’s equation and the continuity equation in fluid mechanics, it can be shown that there is a certain relationship between the pressure difference and flow rate when fluid flows through a throttling device, and this quantitative relationship conforms to the basic equation of flow rate. Based on this equation, the flow rate can be calculated from the measured pressure difference; this is the principle behind how differential pressure flow meters measure flow rate
A differential pressure (also known as throttling) flow meter is based on the principle of throttling in fluid flow; it measures flow rate by utilizing the pressure difference generated when the fluid passes through a throttling device. It is one of the most mature and widely used methods for measuring flow rate in current production. It usually consists of a throttling device (such as orifice plates, nozzles, Venturi tubes, etc.) that can convert the flow rate of the fluid under test into a pressure difference signal, and a differential pressure flow meter that can convert this pressure difference into the corresponding flow rate value for display.
A differential pressure flow meter is based on the throttling principle of fluid flow
A differential pressure flow meter consists of a primary device and a secondary device. The primary device, known as the flow measurement element, is installed in the pipeline of the fluid being measured; it generates a pressure difference that is proportional to the flow rate, which is then used by the secondary device to display the flow rate.
The differential pressure flow meter has a simple structure and a clear working principle; the flow equation can be derived directly using Bernoulli’s equation and the continuity equation. It is easy to install, and a large amount of reliable experimental data is available on it. A differential pressure flow meter is an instrument that measures flow rate based on the differential pressure generated by the flow measurement element installed in the pipeline, along with the known properties of the fluid and the geometric dimensions of the measurement element and the pipeline.
Based on the throttling principle of fluid flow, flow measurement is achieved by utilizing the pressure difference generated when fluid passes through the throttling device.
It is based on the throttling principle of fluid flow, that is, it uses the pressure difference generated when fluid flows through a throttling device to measure the flow rate.
Measurement is carried out according to the principle of flow throttling
It is based on the throttling principle of fluid flow, utilizing the pressure difference generated when fluid passes through a throttling device to measure flow rate.