3. Centrifugal Pump with the following characteristics: • Minor losses = 6.5 V2/2g • Pipe length = 5.5 km • Roughness = 0.15 mm Q (L/s) | 70 | 60 | 50 40 30 20 10 Hi (m) 31 35 38 40.6| 42.5 43.7 44.7 45 Suction head = 10 m No (%) 40 | 53 60 60 57 50 35 • Delivery head = 30 m Determine the required pipes diameter and power needed to pump 65 L/s if the pump impeller is below the suction reservoir.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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3. Centrifugal Pump with the following characteristics:
• Minor losses = 6.5 V²/2g
Q (L/s)
70 60 | 50 | 40
30
20
10
Pipe length = 5.5 km
Roughness = 0.15 mm
H: (m)
31 35
38 40.6 42.5
43.7
44.7
45
Suction head = 10 m
40
53
57
50
35
По (%)
• Delivery head = 30 m
Determine the required pipes diameter and power needed to pump 65 L/s if the pump impeller is below the
suction reservoir.
4. A pump adds 48m against a closed delivery pump, 36 m at discharge of 240 L/s and 20m at a flow
rate of 340 L/s. The static head is 16 m.
a) Calculate the constants bı, b2 and b3 to describe the pump curve mathematically.
b) Calculate the constants a1 and az to describe the system curve mathematically
c) Derive the equivalent pump curve for two pumps in parallel
d) Calculate the equivalent pump head and discharge for two pumps in series and parallel.
Transcribed Image Text:3. Centrifugal Pump with the following characteristics: • Minor losses = 6.5 V²/2g Q (L/s) 70 60 | 50 | 40 30 20 10 Pipe length = 5.5 km Roughness = 0.15 mm H: (m) 31 35 38 40.6 42.5 43.7 44.7 45 Suction head = 10 m 40 53 57 50 35 По (%) • Delivery head = 30 m Determine the required pipes diameter and power needed to pump 65 L/s if the pump impeller is below the suction reservoir. 4. A pump adds 48m against a closed delivery pump, 36 m at discharge of 240 L/s and 20m at a flow rate of 340 L/s. The static head is 16 m. a) Calculate the constants bı, b2 and b3 to describe the pump curve mathematically. b) Calculate the constants a1 and az to describe the system curve mathematically c) Derive the equivalent pump curve for two pumps in parallel d) Calculate the equivalent pump head and discharge for two pumps in series and parallel.
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