Paolo owns a hydroelectric power generating system as shown in HG008. Water flows from an upper reservoir to a lower one passing through a turbine at the rate of 150 lps. The total length of pipe connecting the two reservoir is 100 m. The pipe diameter is 250 mm and the Hazen – Williams coefficient is 120. The water surface elevations of reservoirs 1 and 2 are 197 m and 50 m, respectively. 1. Find the frictional head loss in the pipe in m. 2. Determine the power generated by the turbine in kW. Neglect minor losses.

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Friction

Friction is defined as the force that prevents any solid surface, any layer of fluid, or any kind of element or material from sliding.