Chemical Engineering - Fluid Mechanics - Discussion
Discussion Forum : Fluid Mechanics - Section 4 (Q.No. 26)
26.
A centrifugal pump has the following specifications:
Power = 4 H.P.; Speed = 800 rpm
Head = 8 metres
Flow = 1000 litres/minutes.
If its speed is halved, the new discharge will be __________ litres/minute.
Power = 4 H.P.; Speed = 800 rpm
Head = 8 metres
Flow = 1000 litres/minutes.
If its speed is halved, the new discharge will be __________ litres/minute.
Discussion:
3 comments Page 1 of 1.
GURJAR said:
5 years ago
Q1/Q2 = N1/N2 when impeller diameter constant.
Then 1000/Q2 = 800/400,
Q2= 500.
Then 1000/Q2 = 800/400,
Q2= 500.
(4)
Sangtam IIT said:
9 years ago
From affinity law for pump.
Q is proportional to N.
N2= half of N1= 400 rpm.
Q1/Q2 = N1/N2.
1000/Q2 = 800/400.
Q2 = 500 liters/minute.
Q is proportional to N.
N2= half of N1= 400 rpm.
Q1/Q2 = N1/N2.
1000/Q2 = 800/400.
Q2 = 500 liters/minute.
(1)
Urvish soni said:
9 years ago
It refers the affinity laws of pumps.
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