Chemical Engineering - Fluid Mechanics - Discussion
Discussion Forum : Fluid Mechanics - Section 1 (Q.No. 11)
11.
With increasing flow rate, the hydraulic efficiency of a centrifugal pump
Discussion:
31 comments Page 3 of 4.
Aditya singh said:
7 years ago
The correct answer will be D.
Shiv said:
7 years ago
According to "operating characteristic curve", it is head which decreases monotonically. Efficiency first increases till peak point of it and then decreases. Power consumption is increased monotonically. So, the answer should be "D" in place of A.
Sushil said:
8 years ago
A centrifugal pump has three form of efficiency that aids on pump performance : mechanical efficiency, volumetric efficiency and major part Hydraulic efficiency which includes liquid friction and other losses in the volute and impeller of the pump, these losses are proportional to increase in flow rate, because increasing flow more than re >2100 tends to turbulence and Eddies, skin friction, occurs in the line, fittings etc.
Ashish Patel said:
8 years ago
Right answer should be D. According to "operating characteristic curve" with increasing flow rate the hydraulic efficiecy is first increase and then decrease.
Md. Atoar Rahman said:
9 years ago
Yes, The answer should be option D.
Nipu said:
1 decade ago
The answer should be option D.
Ccjayesh said:
1 decade ago
For centrifugal pumps, the efficiency tends to increase with flow rate up to a point midway through the operating range (peak efficiency) and then declines as flow rates rise further.
Abhi said:
1 decade ago
Answer would be D. It's head which decreases monotonically with flow rate.
Chirag said:
1 decade ago
Pw = (Q x H) / 3960.
Where:
Q= Flow (gallons per minute-GPM).
H= Head (feet).
Where:
Q= Flow (gallons per minute-GPM).
H= Head (feet).
Ajit said:
1 decade ago
What is the formula of hydraulic efficiency?
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