Question 4 Figure 4 shows a water supply system designed for a building, including the pipelines with a centrifugal pump

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Question 4 Figure 4 Shows A Water Supply System Designed For A Building Including The Pipelines With A Centrifugal Pump 1 (81.62 KiB) Viewed 43 times

Question 4 Figure 4 shows a water supply system designed for a building, including the pipelines with a centrifugal pump and two tanks. The pump whose characteristics are given in Table Q4 is used to pump water (density = 1000 kg/m) from an open tank in basement through 60 m (length of pipeline) of 70 mm diameter pipe of friction factor f =0.02 to another open tank in which the surface level of the water is 55.0 m above that in the supply tank. The minor loss coefficients of the entrance and exit of the pipe are both 1.0. Ignore other minor loses, Table Q4 Head-flow characteristics of the pump Pump Head (m) 91 85 63 49 32 Flow Rate (m/s) 0.004 0.005 0.006 0.007 0.008 0.009 Pump efficiency (%) 30 62 85 76 0 85 64 Exit K=1 55 m Steppe EG 2 mn Steel pipe Pamp Entrance K-1 Figure 4 Water supply system for a high-rise building (a) Determine the flow rate in the pipeline. (15 marks) (b) Determine the power of the electric motor required to drive the pump for producing the water flow. (5 marks)