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:
29 comments Page 1 of 3.
Krunal said:
1 decade ago
What is mean by monotonically?
Shan Rana said:
1 decade ago
In mathematics, a monotonic function (or monotone function) is a function between ordered sets that preserves the given order. This concept first arose in calculus, and was later generalized to the more abstract setting of order theory.
Ajit said:
1 decade ago
What is the formula of hydraulic efficiency?
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).
Abhi said:
1 decade ago
Answer would be D. It's head which decreases monotonically with flow rate.
Ccjayesh said:
10 years 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.
Nipu said:
9 years ago
The answer should be option D.
Md. Atoar Rahman said:
8 years ago
Yes, The answer should be option D.
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.
Sushil said:
7 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.
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