CEIE 230 Assignment 10

# CEIE 230 Assignment 10 - CEIE 230 Homework Assignment No 10...

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CEIE 230 – Homework Assignment No. 10 Assigned April 14, 2008. Due April 21, 2008 at start of class. Read: “Fluid Mechanics”, Chapter 11, 11.1 – 11.6. pp. 410 - 433 1. Problem 11.11. ............................................................... Ans: Q = 1,400 gal/min η p = 79.0% 2. Problem 11.12 3. Problem 11.18 – plus the new pump power. ................... Ans: Q (2) = 994 gpm (1) h P(2) = 791 ft P o(2) = 199.6 HP 4. A pump takes suction from the bottom of a full 3 million gallon water (2) storage tank (D = 90-ft) with a 40-ft section of 6-inch (C=80) pipe that has negligible minor head losses. The pump is at the same elevation as the bottom of the tank. When it is delivering 2 ft 3 /sec, the manufacturer requires a NPSH = 35-ft. (a) Prove that the pump is not cavitating and (b) calculate how long it will take before the pump starts to cavitate. . ............................... Ans: t = 2.05 days 5. A single pump and system have characteristics as shown on the graph below.

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CEIE 230 Assignment 10 - CEIE 230 Homework Assignment No 10...

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