6. A pump is connected to a rising main with a diameter of 0.35m and length of 400m. The rising main discharges to a level 32m above the sump level. The friction factor of the rising main may be taken as 0.01, local losses total 2.5V² /2g, and the pump has the characteristics shown in Table Q6. Determine the flow rate, head and efficiency at duty point under the following design scenarios: () One pump (i) Two pumps operating in parallel (ii) Two pumps operating in series

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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6. A pump is connected to a rising main with a diameter of 0.35m and length of 400m. The
rising main discharges to a level 32m above the sump level. The friction factor of the rising
main may be taken as 0.01, local losses total 2.5V² /2g, and the pump has the
characteristics shown in Table Q6. Determine the flow rate, head and efficiency at duty
point under the following design scenarios:
() One pump
(i) Two pumps operating in parallel
(ii) Two pumps operating in series
You may find the following expression useful:
ALV?
h,
2gD
Table 6: Pump A characteristics
Flow rate (m3/s)
0 0.1
0.2
0.3
0.4
0.5
Pump head (m)
39 38
35
30
22
12
Efficiency (%)
48
62
63
55
44
Transcribed Image Text:6. A pump is connected to a rising main with a diameter of 0.35m and length of 400m. The rising main discharges to a level 32m above the sump level. The friction factor of the rising main may be taken as 0.01, local losses total 2.5V² /2g, and the pump has the characteristics shown in Table Q6. Determine the flow rate, head and efficiency at duty point under the following design scenarios: () One pump (i) Two pumps operating in parallel (ii) Two pumps operating in series You may find the following expression useful: ALV? h, 2gD Table 6: Pump A characteristics Flow rate (m3/s) 0 0.1 0.2 0.3 0.4 0.5 Pump head (m) 39 38 35 30 22 12 Efficiency (%) 48 62 63 55 44
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