Pipeline flow rate
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Assuming the outlet pressure of the water pump is 2.0 Mpa and the outlet pipe has a diameter of DN25, how can the flow rate of water be calculated?
For short pipes: (local resistance and velocity head cannot be ignored) The flow rate Q = √(2gH), where: Q – flow rate, (m^3/s)； π————pi ； d——inner diameter of the pipe (m), L——length of the pipe (m) ； g——acceleration due to gravity (m/s^2) ； H — head difference at both ends of the pipeline (m), ； λ ———— the friction coefficient along the pipeline (unitless) ； ζ————Local resistance coefficient of the pipeline (unitless; values for multiple sections should be added together)
How is this calculated? There are just these few parameters
If the pipeline is extended to a distance of 100 meters, the flow rate is another matter. If the pipeline is to be delivered 100 km away, that’s another matter. Do you know what’s missing? ?
The resistance caused by the length of the pipe, the height of the outlet, and whether there are flow meters or valves to regulate flow – all of these have an impact