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Unformatted text preview: (g) Draw an appropriate control volume for this problem, and derive an expression for the change in height h of water in the tank, dh/dt. Be sure to indicate any assumptions you are making. (h) Calculate dh/dt if the diameters of each of the pipes and the tank are D 1 = 10 cm, D 2 = 6 cm, D 3 = 4 cm, and D tank = 0.5 m, and water enters pipe 1 at a rate of 1.2 kg/s, the average velocity in pipe 2 is V 2 =1.5 m/s, and the flow rate through pipe 3 is 8 x 10-4 m 3 /s. to drain valve H h(t) 1 2 3 Problem 5 A fan draws air from atmosphere through a 0.30 m diameter round duct that has a smoothly rounded entrance. A differential manometer with one opening in the wall of the duct and the other opening to atmosphere shows a vacuum pressure of 2.5 cm of water. The density of air is 1.22 kg/m 3 . Assume the system is at steady state with negligible viscous losses. a) Determine the volume rate of air flow in the duct in cubic meters per second. b) What is the power input from the fan in Watts?...
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This note was uploaded on 02/05/2010 for the course CHEM 150A taught by Professor Muller during the Spring '10 term at University of California, Berkeley.
- Spring '10