How do I calculate the friction heads, indicated with the RED ARROW
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
How do I calculate the friction heads, indicated with the RED ARROW
![Given the pump characteristics as follows, determine the pump efficiency and
power requirement for a pipeline of diameter 300 mm, length 5 km, roughness 0.03
mm and a static lift of 10 m. Comment on the suitability of this pump and pipeline
combination.
Pump characteristics
Discharge (L/s) 0
10
20
30
40
50
60
70
Head (m)
26.25 24.00 21.75 19.50 17.50 15.00 11.75
6.75
Efficiency (%)
28
51
68
80
85
80
64
Solution
(a) Determine the pipeline characteristic by finding the frictional losses at the dis-
charges given in the earlier table. These are most readily found using the HRS
charts or tables.
Pipeline characteristics
Discharge (L/s)
20
30
40
50
60
70
Friction head (m)
1.35
2.8
4.7
7.25
9.75
13.5
Friction+static head (m)
11.35
12.8
14.7
17.25
19.75
23.5](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fee30dc44-f0f3-468d-b344-a9aae8c49175%2F6c6b6c5f-e92a-4ad1-83c5-aaed12f087d8%2Fg3j8ap7_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Given the pump characteristics as follows, determine the pump efficiency and
power requirement for a pipeline of diameter 300 mm, length 5 km, roughness 0.03
mm and a static lift of 10 m. Comment on the suitability of this pump and pipeline
combination.
Pump characteristics
Discharge (L/s) 0
10
20
30
40
50
60
70
Head (m)
26.25 24.00 21.75 19.50 17.50 15.00 11.75
6.75
Efficiency (%)
28
51
68
80
85
80
64
Solution
(a) Determine the pipeline characteristic by finding the frictional losses at the dis-
charges given in the earlier table. These are most readily found using the HRS
charts or tables.
Pipeline characteristics
Discharge (L/s)
20
30
40
50
60
70
Friction head (m)
1.35
2.8
4.7
7.25
9.75
13.5
Friction+static head (m)
11.35
12.8
14.7
17.25
19.75
23.5
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