Water (p = 1000 kg/m and v = 1 x 106 m/s) is transported to a...

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Water (p = 1000 kg/m and v = 1 x 106 m/s) is transported to a residential area at a rate of 1.5 m/s through a 70 cm diameter horizontal concrete pipe with a surface roughness of 3 mm and a total length of 1500 m. a) Ignoring any minor losses, calculate the useful pumping power requirement due to frictional losses in the pipe. [5 marks] ANS: 696 kW b) An engineer working for the city proposes to line the interior surface of the concrete pipe with 2 cm thick plastic lining that has a surface roughness of 0.04 mm. Recalculate the useful pumping power required to move 1.5 m/s of water through 1500 m of the lined pipe. [5 marks] ANS: 383 kW Water (p = 1000 kg/m and v = 1 x 106 m/s) is transported to a residential area at a rate of 1.5 m/s through a 70 cm diameter horizontal concrete pipe with a surface roughness of 3 mm and a total length of 1500 m. a) Ignoring any minor losses, calculate the useful pumping power requirement due to frictional losses in the pipe. [5 marks] ANS: 696 kW b) An engineer working for the city proposes to line the interior surface of the concrete pipe with 2 cm thick plastic lining that has a surface roughness of 0.04 mm. Recalculate the useful pumping power required to move 1.5 m/s of water through 1500 m of the lined pipe. [5 marks] ANS: 383 kW