Question

B.18. For the purpose of energy recovery, water is stored in a large tank located on a hill. The water rises from a nearby river by means of pumps that work an 8-hour shift per day; the recovery is carried out with turbines that operate in another 8 hour shift per day. Assuming that the average difference in level between the river and the reservoir is 350 meters and that the flow to be moved is 20 m3 / sec, calculate the characteristics of the pumping station.

B.19. Solve problem B.18 for an 80-foot level difference and the same flow.

Answer 1

Q from the question it's shown that the work repassed is the for the pump given en from turbine. Power output of the turbine; P = eg & Haet giren that flow rate Q = 2013 Isec, power output; p= 9.81x60°x 20x350 = 68.67 MW. During 8-hour shift the energy available, is Hnet -3501 3 É = 68.67X106 x8 X3600 Joules. If so Haet 80 ft = 80X0.305 = 24.4m C power output = @g@inet = 9810x20 x 24.4 = 4.7478 MH.