Solved: Suppose the pump of Fig. P14-21C is situated

Chapter 14, Problem 22P

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Problem 22P

Suppose the pump of Fig. P14-21C is situated between two large water tanks with their free surfaces open to the atmosphere. Explain qualitatively what would happen to the pump performance curve if the free surface of the outlet tank were raised in elevation, all else being equal. Repeat for the system curve. What would happen to the operating point—would the volume flow rate at the operating point decrease, increase, or remain the same? Indicate the change on a qualitative plot of H versus , and discuss. (Hint: Use the energy equation between the free surface of the tank upstream of the pump and the free surface of the tank downstream of the pump.)

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