Regarding the changes in pump parameters, experts, take a look!
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How did the last three change? Why, I personally think it should remain unchanged, since the properties of the fluid haven’t changed and the rotation speed hasn’t changed either. What do you think?
B B B A D (if the dot here is at the BEP point, it would be B)
The head decreases, the shaft power increases; efficiency may rise or fall, depending on whether it is on the left or right side of the point of maximum efficiency