A centrifugal pump tested at nominal speed 1750 rpm. Data measured during the test are given in the following table: Rate of flow Suction Motor current Discharge pressure kgf/cm2 3.73 (L/s) pressure(mm Hg) amp 58.61 18 31.5 37.93 3.39 26.2 50.5 6.9 2.98 31 63 -22.56 2.61 33.9 69.5 -39.11 2.34 35.2 75.7 -58.76 1.99 36.3 88 -100.1 1.14 38 94.6 -124.4 0.6 39 The diameters of the suction and delivery pipes are 15 cm. The motor is supplied at 460 volt, 3 phase and has a power factor of 0.875 and has a constant efficiency of 90%. A) Calculate by hand the net head delivered and the efficiency of the pump at flow rate of 63 L/s. B) Use excel sheet and its formula to solve the equations and plot the pump head, power input, and efficiency versus the pump flow rate.

8. A pumped fluid distribution system is being designed to deliver 400 gal/min of water to a cooling system in a power generation plant. Use the figure below to make an initial selection of Schedule 40 pipe sizes for the suction and discharge lines for the system. Also, solve for the actual average velocity of flow for each pipe. DN (mm) NPS (in) 250 200- 150 - 6 125- Suction lines 100 - 4 3. 65 2 50E 2 Discharge lines 40 - 32 - 25 E 15 15 20 30 40 60 200 400 600 S00 2000 4000 6000 S00 80 100 10 Volume Flow Rate, Qallmin) 8 10 15 20 25 30 40 +++++ +++ 60 80 100 150 200 300 400 500600 800 1000 1200 2000 +++++ +++++ Volame Flow Rate, Q (mVh)

Determine the % increase in Flowrate, Net pumping head and Pump power based on the following conditions below: a) Increasing the impeller speed by 30% b) Increasing the impeller diameter by 20% c) Compute the same if the two conditions above will prevail in one condition Please show complete solution.