To conduct the performance test and to find the efficiency test of the centrifugal pump
Centrifugal pump setup, wattmeter, tachometer, V-notch setup, hook gauge, measuring scale.
Start the pump by pressing the start button
Rotate the handle to set the speed of motor to be constant and check the speed using tachometer
Speed of Motor = ____ rpm
Open the delivery valve and allow the water to flow in the channel. Take the hook guage reading at the V-notch, before and after valve opening, to find the discharge
Initial reading (water level till crest) = ____ cm
Final reading = ____ cm
Head of water = ____ cm
Actual discharge Qact = ____ cm3/sec
Delivery Head = ____ kg/cm2
Delivery Head = ____ m
STEP 4Note the delivery pressure reading for the corresponding discharge
Suction Head = ____ kg/cm2
Suction Head = ____ m
z = 43 cm
Total Head =Hd+Hs+z = ___ m
STEP 5Take the suction head pressure reading corresponding to the discharge
Wattmeter Reading = ____ Watt
Input Power = ____ Watt
Output Power = ____ Watt
Efficiency= ___ %
STEP 6Note the watt meter reading corresponding to the discharge
Delivery Head = ____ m of water
Suction Head = ____ m of water
Actual Discharge, Qact = 14.17 x h5/2
= ____ cm3/sec
Watt Meter Reading, WR = ____ W
Total Head, H = Hs+Hd+z = ____ m
Input Power = WR x WC x ηm x NP
= ____ W
Output Power = γ x Q x H
= ____ W
Efficiency, η = (O.P/I.P) x 100
= ____ %
Repeat Steps 3, 4, 5 and 6 to get data points for plotting graph