3.4 Determine the effect of placing demands at points along a pipe rather than at the end node (point D) for the 300-m l

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3 4 Determine The Effect Of Placing Demands At Points Along A Pipe Rather Than At The End Node Point D For The 300 M L 1 (25.42 KiB) Viewed 33 times

3.4 Determine the effect of placing demands at points along a pipe rather than at the end node (point D) for the 300-m long pipe segment A-D shown in the figure. The pipe has a diameter of 150 mm and a roughness height of 0.0001 m, and the kinematic viscosity of water at the temperature of interest is 1x10 m/s. The total head at Point A is 200 m, and the ground elevation along the pipe is 120 m. The flow past point A is 9 Vs. Points A, B, C, and D are equidistant from each other. Upstream Point A Intermediate Point B Intermediate Point C End Point D a) Assume that there is no water use along the pipe (that is, flow is 9 1/s in all segments). Determine the head loss in each segment and the pressure head (in meters) at points B, C, and D. b) Assume that a small amount of water is used at points B and C (typical of a pipe in a residential neighborhood), such that the flow in the second and third segments decreases to 8 and 7 1/s. respectively. Determine the pressures at points B, C, and D. c) Assume that the water is withdrawn evenly along the pipe, such that the flows in the second and third segments are 6 and 3 1/s, respectively. Find the pressures at points B, C, and D. d) At these flows, do the pressures in the pipe vary significantly when the water use is lumped at the endpoint versus being accounted for along the length of the pipe? Would you expect a similar outcome at much higher flows? Pressure in meters of water Point Part (a) Part (b) Part (C) Im lo la B с D