Q2. Two centrifugal pumps are connected in series in a given pumping system. Plot total head Ah against capacity Q pump and system curves and determine the operating points for (a) only pump 1 running (b) only pump 2 running (c) both pumps running on the basis of the following data: operating data for pump 1 Ah, m 50 46.5 44 39.5 36 32.5 28.5 49.5 48.5 50 48 42 Qs, m³/h 0 125 150 175 200 | 225 | 250 25 75 100 operating data for pump 2 Ah, m Q, m³ /h 0 39.5 39 25 75 30.5 28 37 100 40 38 36 34 32 25.5 50 125 150 175 200 225 250 Data for system Ah, m 35 37 40 43.5 46.5 50.5 125 54.5 59.5 66 72.5 80 es, m³ /h 0 25 75 175 200 225 250 50 100 150
Q2. Two centrifugal pumps are connected in series in a given pumping system. Plot total head Ah against capacity Q pump and system curves and determine the operating points for (a) only pump 1 running (b) only pump 2 running (c) both pumps running on the basis of the following data: operating data for pump 1 Ah, m 50 46.5 44 39.5 36 32.5 28.5 49.5 48.5 50 48 42 Qs, m³/h 0 125 150 175 200 | 225 | 250 25 75 100 operating data for pump 2 Ah, m Q, m³ /h 0 39.5 39 25 75 30.5 28 37 100 40 38 36 34 32 25.5 50 125 150 175 200 225 250 Data for system Ah, m 35 37 40 43.5 46.5 50.5 125 54.5 59.5 66 72.5 80 es, m³ /h 0 25 75 175 200 225 250 50 100 150
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Transcribed Image Text:Q2. Two centrifugal pumps are connected in series in a given pumping system. Plot total head Ah
against capacity Q pump and system curves and determine the operating points for
(a) only pump 1 running
(b) only pump 2 running
(c) both pumps running
on the basis of the following data:
operating data for pump 1
39.5 36
32.5 28.5
Ah, m
Os, m³ /h
50
49.5
48.5
48
46.5
100
44
42
25
50
75
125
150
175 | 200 | 225 | 250
operating data for pump 2
| 34
| 32
30.5 28
150
200 225
37
Ah, m
Q, m³ /h 0
40
39.5
39
38
36
25.5
25
50
75
100
125
175
250
Data for system
Ah, m
Qs, m³ /h
35 37
40
43.5 46.5 50.5
125
59.5 66
72.5 80
54.5
50
75
100
150
175
200 225
250
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