Question

Problem 3: Water at 20° C is to be pumped through a piping network at 14,000 gal/min using a 28-in diameter pump running at 1170 rev/min. The pump characteristics are shown below in Figure 1. Determine the required brake horse power. When a 65 ft length of 12 in diameter pipe with an average friction factor of 0.018 is connected between the upstream of the pump and the water reservoir, how far below the reservoir surface should the pump inlet be placed to avoid cavitation?

          Problem 3: Water at 20° C is to be pumped through a piping network at 14,000 gal/min using a
28-in diameter pump running at 1170 rev/min. The pump characteristics are shown below in
Figure 1. Determine the required brake horse power. When a 65 ft length of 12 in diameter pipe
with an average friction factor of 0.018 is connected between the upstream of the pump and the
water reservoir, how far below the reservoir surface should the pump inlet be placed to avoid
cavitation?

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Problem 3: Water at 20° C is to be pumped through a piping network at 14,000 gal/min using a
28-in diameter pump running at 1170 rev/min. The pump characteristics are shown below in
Figure 1. Determine the required brake horse power. When a 65 ft length of 12 in diameter pipe
with an average friction factor of 0.018 is connected between the upstream of the pump and the
water reservoir, how far below the reservoir surface should the pump inlet be placed to avoid
cavitation?

Added by Jessica C.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Christian Dell

Step 1

First, we need to determine the flow rate in m^3/s. We are given the flow rate in gallons per minute, so we need to convert it to m^3/s. Flow rate = 14,000 gal/min * (3.78541 L/gal) * (1 m^3/1000 L) * (1 min/60 s) = 0.992 m^3/s Show more…

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Problem 3:Water at 20 C is to be pumped through a piping network at 14,000 gal/min using a 28-in diameter pump running at 1170 rev/min.The pump characteristics are shown below in Figure 1.Determine the required brake horse power.When a 65 ft length of 12 in diameter pipe with an average friction factor of 0.018 is connected between the upstream of the pump and the water reservoir,how far below the reservoir surface should the pump inlet be placed to avoid cavitation? NPSH Figure1.

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