What should be the height difference when calculating the pump head? ?
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What should be the height difference when calculating the pump head? ? Is it E+S or still S? Why? ? ? I think it’s E+S, because the pump needs to reach the highest E+S level before it can drop
I also think it’s e+s, because head refers to the maximum height that a pump can lift water to. Please give me more guidance.
I see that you’re using open tanks, with P1=P2. So it’s E+S+Hf
It’s e+s, because head refers to the maximum height that a pump can lift water to
It’s e+s, because head refers to the maximum height that a pump can lift water to
Considering that both ends of yours are open, it should be E+S+Hf
It’s of course E+S, the total work done by the pump. But you need to check the NPSH for this pump.
Consider the pump’s self-priming capacity.
When the water pump starts operating, the pipeline is not filled with water, and the head required must be at least E+S+Hf. Once the pipeline is filled with water and free of gas, the required head drops to S+Hf. The rated head can be determined using S+Hf by selecting the pump head; thereafter, it is necessary to ensure that the head at low flow rates is greater than E+S+Hf – both conditions must be satisfied.
Could you explain why the head is different when there is gas present and when there is no gas? ?