Concept explainers
The performance data for a centrifugal water pump are shown in Table P14-47E for water at
(a)
The pump efficiency for each data tabulated.
Answer to Problem 47EP
The pump efficiency for each data is represented in Table-(2).
Explanation of Solution
Given information:
Table-(1) represents the volume flow rate, height and power of pump.
Write the expression for pump efficiency.
Here, density of water is
Calculation:
Refer to Table-A-3E "Properties of saturated water" to obtain density of water as
Substitute
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Substitute
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Substitute
Table-(2) represents the efficiency of pump for different head, volume flow rate and power.
Table-(2)
(b)
The volume flow rate for BEP of the pump.
The net head for BEP of the pump.
Answer to Problem 47EP
The volume flow rate for BEP of the pump is
The net head for BEP of the pump is
Explanation of Solution
Given information:
Table-(2) represents the efficiency of pump for different head, volume flow rate and power.
Table-(2)
Here, from the Table-(2) the maximum efficiency of pump is
Conclusion:
The volume flow rate for BEP of the pump is
The net head for BEP of the pump is
(b)
The volume flow rate for BEP of the pump.
The net head for BEP of the pump.
Answer to Problem 47EP
The volume flow rate for BEP of the pump is
The net head for BEP of the pump is
Explanation of Solution
Given information:
Table-(2) represents the efficiency of pump for different head, volume flow rate and power.
Table-(2)
Here, from the Table-(2) the maximum efficiency of pump is
Conclusion:
The volume flow rate for BEP of the pump is
The net head for BEP of the pump is
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Chapter 14 Solutions
Fluid Mechanics: Fundamentals and Applications
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