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Can the water flow rate be estimated just by knowing the pressure difference and pipe diameter?

2015-11-17View Original

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Can the water flow rate be estimated just by knowing the pressure difference and pipe diameter?
Reply #22015-11-17
Applying Bernoulli’s equation between the pressure points is sufficient
Reply #32015-11-17
Make a design specification and give it a try
Reply #42015-11-18
It should be possible; you can see this from the pressure drop formula. There is a definite relationship between pressure drop, flow rate, and pipe fittings, but this relationship may change depending on the flow conditions. The straightforward approach is to assume a certain flow state, calculate the corresponding flow rate, and then check whether it falls within the range for that flow state; you can try this method one by one. I haven’t dealt with these concepts for quite some time since starting work, so I’ve forgotten the specific formulas. You can look up books on fluid mechanics – it’s actually quite easy to understand. I hope this helps you
Reply #52015-11-18
It’s impossible to estimate; the pressure loss in between cannot be assessed, especially with valves
Reply #62015-11-18
Yes, it’s similar to the principle used in pitot tubes for measuring speed
Reply #72015-11-18
hf = det(p)/density, and then use the Fanning formula to calculate the flow velocity. I’m also just learning this; please give some guidance
Reply #82016-01-05
Yes, reference can be made to Appendix B of the guidelines SH/T 3035-2007 on the selection of pipe diameters for process units in petrochemical enterprises, which deals with flow rate and pressure drop in water pipelines

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