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

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

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

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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