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Calculations Exp 1 &2

The document contains calculations of flow rate, torque, brake power, water power, and overall efficiency for two experiments on a hydraulic turbine: Flow rate was calculated using the equation Q=V/t. Torque was calculated as T=(w1-w2)*r. Brake power was calculated as Pb=2πnT/60. Water power was calculated as Pw=ρgHQ. Overall efficiency was calculated as φ=Pb/Pw. The calculations show that for the first experiment, flow rate was 2*10e-4 m3/s, torque was 0.03 Nm, brake power was 3.97 kW, water power was 15.7 kW, and

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TauQeer Shah
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25 views4 pages

Calculations Exp 1 &2

The document contains calculations of flow rate, torque, brake power, water power, and overall efficiency for two experiments on a hydraulic turbine: Flow rate was calculated using the equation Q=V/t. Torque was calculated as T=(w1-w2)*r. Brake power was calculated as Pb=2πnT/60. Water power was calculated as Pw=ρgHQ. Overall efficiency was calculated as φ=Pb/Pw. The calculations show that for the first experiment, flow rate was 2*10e-4 m3/s, torque was 0.03 Nm, brake power was 3.97 kW, water power was 15.7 kW, and

Uploaded by

TauQeer Shah
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Calculations:

Flow rate (Qv):


Q=V/t
Q1=0.005/25=2*10e-4
Q2=0.005/25=2*10e-4
Similarly others.
Torque (T):
T= (w1-w2)*r
T1= (2-1)*0.03=0.03
T2= (2.5-1.5)*0.03=0.037 n2=r1*n1/r2
Similarly others. n2= 33*2300/60=1265
Brake power (Pb): similarly for other rpms
Pb= 2nT/60
Pb1= 2*1265*0.03/60=3.97
Pb2=2*1375*0.037/60=5.4
Water Power (Pw):
Pw=
Pw1=1000*9.8*8*2*10e-4=15.7
Pw2=1000*9.8*8*2*10e-4=15.7
Similarly others.
Overall efficiency ():
=Pb/Pw
1=3.97/15.7=25.31%
2 =5.4/15.7=34.9% similarly others.
Calculations:
Flow rate (Qv):
Q=V/t
Q1=0.005/13.75=3.6*10e-4
Q2=0.005/16=3.1*10e-4
Similarly others.
Torque (T):
T= (w1-w2) n2=r1*n1/r2
T1= (1.75-1)*0.03=0.0225 n2= 33*2200/60=1210
T2= (1.75-1)*0.03=0.0225 similarly for other rpms
Similarly others.
Brake power (Pb):
Pb= 2nT/60
Pb1= 2*1210*0.03/60=2.85
Pb2=2*1265*0.037/60=2.98
Water Power (Pw):
Pw=
Pw1=1000*9.8*2*3.6*10e-4=7.06
Pw2=1000*9.8*3*3.1*10e-4=9.12
Similarly others.
Overall efficiency ():
=Pb/Pw
1=2.85/7.06=40.37%
2 =2.98/9.12=32.67% similarly others.

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