Seeking help with the calculation of head when the pump outlet has two branches
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It is known that the head required for the two outlets of the pump is H1 and H2 respectively, while the flow rates required are Q1 and Q2 respectively. Therefore, when selecting a pump, the flow rate to be used is Q = Q1 + Q2, and the head should be the larger of H1 and H2； Is that so?
As long as it is an output manifold, it should be selected based on the maximum head. For reference.
It is possible to consider it on a larger scale and take into account a certain coefficient, but the pipe layout still needs to be considered specifically.
Flow rate – current; head – voltage; pipe loss – resistance. Then, by using the knowledge from junior high school physics, understanding parallel and series circuits becomes clear
If the pressure drops across the two pipelines differ significantly, especially when the pressure drop in the pipeline with lower flow rate is much higher, it is unreasonable to use a single pump in such a situation; it leads to significant energy waste, and separate pumps should be used instead. For calculations related to pumps, you can refer to my post at https://bbs.hcbbs.com/thread-1764877-1-1.html