ESSOM COMPANY LIMITED
Part 3: Experiment
14
3.
Slightly apply a spring balance force right, FLeft, to obtain the spring balance force right of around 200 g. Record
data as specified in 2.
4.
Repeat 3 by slightly apply a spring balance force right, FLeft, in steps of 200 g. until the turbine speed is reduced
to about 700 rpm.
5.
Slightly close flow control valve to increase nozzle pressure and repeat step 2 to 4.
Racing Characteristics Test
6.
Remove the correspondent dynamometer brake lining
.
7.
Run the turbine with the turbine control valve
(
TV
)
fully open
.
8.
Record the following data
:
-
Turbine speed,
rpm
-
Turbine inlet pressure,
kg
/
cm
2
-
Flow rate,
L
/
min
9.
Turn the turbine control valve
(
TV
)
down one full revolution and record same data as in 3
.
10.
Repeat 4 until the valve is fully closed
.
Calculations
From the test data calculate
(
as per sample calculations
):
-
Water flow rate
-
Torque
-
Turbine input power
-
Turbine output power
-
Turbine efficiency
Performance Curves
From the calculated results, plot curves of
:
-
Turbine torque vs speed
-
Turbine inlet pressure vs
.
flow rate
-
Turbine output vs speed
-
Turbine efficiency vs speed
-
Turbine racing characteristic curve