Chapt06

There are three 90 elbows and an open globe valve all

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Unformatted text preview: e overall pressure drop p1 p2 in kPa. Neglect minor losses. P6.118 For the piping system of Fig. P6.118, all pipes are concrete with a roughness of 0.04 in. Neglecting minor losses, compute the overall pressure drop p1 p2 in lbf/in2 if Q 20 ft3/s. The fluid is water at 20°C. D = 8 in L = 1500 ft 1 2 D = 12 in D = 12 in L = 1000 ft L = 800 ft P6.119 Modify Prob. 6.118 as follows. Let the pressure drop p1 p2 be 98 lbf/in2. Neglecting minor losses, determine the flow rate in m3/h. P6.120 Three cast-iron pipes are laid in parallel with these dimensions: v | | e-Text Main Menu P6.122 Modify Prob. 6.121 as follows. Reduce the diameter to 15 cm (with 1 mm), and compute the flow rates for EES water at 20°C. These flow rates distribute in nearly the same manner as in Prob. 6.121 but are about 5.2 times lower. Can you explain this difference? P6.123 Modify Prob. 6.121 as follows. All data are the same except that z3 is unknown. Find the value of z3 for which the flow rate in pipe 3 is 0.2 m3/s toward the junction. (This problem...
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.

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