[Q&A] March 17, 2017 (questions asked at irregular intervals)
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This post was last edited by LQ198619 on 2017-3-17 00:13. Question: What is the working principle of a orifice plate flow meter? Answer: When fluid passes through an orifice plate, the flow velocity increases due to the narrowing of the flow channel, which reduces the pressure. Therefore, given a fixed area for the orifice plate, the flow rate can be determined by measuring the pressure drop upstream and downstream of the orifice plate. Q&A reward rules: 5 Wealth as a participation prize ； A reward of 10 Wealth for answering the key points ； In-depth discussion rewards 15 wealth ； Petrochemical deep processing version – the event to share pictures of chemical equipment has started! A vast amount of wealth, along with HaiChuan coins, is waiting for you to claim! http://bbs.hcbbs.com/thread-1760733-1-1.html Summary post for the Petrochemical Deep Processing section’s 【Question of the Day】 – updated daily by the moderator. http://bbs.hcbbs.com/thread-1496481-1-1.html Summary post of weekly topics for the Petrochemical Deep Processing section~~~ Updated continuously! http://bbs.hcbbs.com/thread-1751483-1-1.html Petrochemical Sector — New Ideas for Energy Saving: The “Creative Thinking” Campaign http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones available for you to claim. A thread on the Petrochemical Section for collecting various chemical technology materials http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes waiting for you to claim
The fluid flowing through the pipes passes through a throttling device inside them, causing a local contraction near the throttling element, which increases the flow velocity and creates a static pressure difference on the upstream and downstream sides. Given the known parameters, the relationship between differential pressure and flow rate can be derived using the principle of fluid continuity and Bernoulli’s equation, thereby allowing the flow rate to be determined. Its basic formula is as follows: c – discharge coefficient, dimensionless; d – diameter of the orifice or throat of the throttling element under operating conditions; D – inner diameter of the upstream pipe under operating conditions; qm – mass flow rate.
When flowing through an orifice plate, the flow rate is proportional to the pressure difference before and after the orifice plate; by measuring this pressure difference, the flow rate can be determined
Measure flow rate by utilizing the pressure difference caused by changes in fluid velocity
The fluid flowing through the pipes passes through a throttling device inside them, causing a local contraction near the throttling element, which increases the flow velocity and creates a static pressure difference on the upstream and downstream sides. Given the known parameters, the relationship between differential pressure and flow rate can be derived using the principle of fluid continuity and Bernoulli’s equation, thereby allowing the flow rate to be determined. Its basic formulas are as follows: c – discharge coefficient, dimensionless; d – diameter of the orifice or throat of the throttling element under operating conditions; D – inner diameter of the upstream pipe under operating conditions; qm – mass flow rate, Kg/s; qv – volume flow rate, m3/s; σ – diameter ratio, d/D, dimensionless; density of the fluid, Kg/m3
The fluid flowing through the pipes passes through a throttling device inside them, causing a local contraction near the throttling element, which increases the flow velocity and creates a static pressure difference on the upstream and downstream sides. Given the known parameters, the relationship between differential pressure and flow rate can be derived using the principle of fluid continuity and Bernoulli’s equation, thereby allowing the flow rate to be determined.
The fluid flowing through the pipes passes through a throttling device inside them, where a local contraction occurs near the throttling element, resulting in an increase in flow velocity. This creates a static pressure difference on the upstream and downstream sides. Given the relevant parameters, the relationship between the pressure difference and flow rate can be derived using the principle of fluid continuity and Bernoulli’s equation, thereby allowing the flow rate to be determined.
When fluid passes through an orifice plate, the flow velocity increases due to the narrowing of the flow channel, which reduces the pressure. Therefore, given a fixed area of the orifice plate, the flow rate can be determined by measuring the pressure drop upstream and downstream of the orifice plate.
The fluid flowing through the pipes passes through a throttling device inside them, causing a local contraction near the throttling element, which increases the flow velocity and creates a static pressure difference on the upstream and downstream sides. Given the relevant parameters, the relationship between differential pressure and flow rate can be derived using the principle of fluid continuity and Bernoulli’s equation, thereby allowing the flow rate to be determined.