A centrifugal pump is driven by a motor. The performance of the pump reveals the following information:
Power input to the pump by the motor (kW):
0.5, 0.7, 0.9, 1.0, 1.2
Power input to the fluid by the pump (kW):
0.3, 0.55, 0.7, 0.9, 1.0
Plot the efficiency curve. The efficiency of a pump is a function of the flow rate.
Assume that the flow rate readings corresponding to power data points are equally
spaced.
As we mentioned in Section 13.5, efficiency of a pump, at a given operating
speed, is a function of flow rate. To plot the efficiency curve, we need to know
the flow rate corresponding to each power readings. For the given problem, we
assume that the flow rate readings corresponding to power data points that are
equally spaced. (Q2 = 2 Q1, Q3 = 3 Q1, Q4 = 4 Q1, Q5 = 5 Q1)
You might also like to view...
One of the two basic types of starting relays used with the resistance start and capacitor start motors is the ____ relay.
a. voltage b. hot-wire c. resistance d. rotor
What are the diff erences between radio frequency identifi cation (RFID) and bar code tagging? When would you use one and not the other? What are the benefits of each technology?
What will be an ideal response?
Why are carbon dioxide emissions a concern?
What will be an ideal response?
Why would it be wrong to state a mechanism of performing a function rather than to generalize and name the function in building up a function structure?
What will be an ideal response?