Due to fouling of the pipe wall, the friction factor for the pipe of Example 12.4 increases from 0.02 to 0.03. Determine the new flowrate, assuming all other conditions remain the same. What is the pump efficiency at this new flowrate? Explain how a line valve could be used to vary the flowrate through the pipe of Example 12.4. Would it be better to place the valve upstream or downstream of the pump? Why? K₁ = 1.5 Water K₁₂ = 1.0 Az= 10t Diameter of pipe 6 in. Pump Total pipe length 200 ft K₁ = 0.5 100 (1) 80 Head de 60 40 -Efficiency 20 (a) 400 800 1200 1600 2000 2400 Flowrate, gal/min (b) Part 1 Write the system equation for this flow system with the original friction factor as function of velocity V in ft/s. hp= V" where n = i eTextbook and Media Save for Later Using multiple attempts will impact your score. 10% score reduction after attempt 2 Part 2 Attempts: 0 of 3 used Submit Answer Formulate the System Equation for the increased friction factor with velocity in units of ft/s. Write the system equation for this flow system with the increased friction factor as function of velocity V in ft/s. hp= + i V" where n = i Part 3 Formulate the System Equation with flowrate in units of ft³/s. Write the system equation for this flow system as function of volume flowrate Q in ft³/s. hp= eTextbook and Media Save for Later + i Using multiple attempts will impact your score. 10% score reduction after attempt 2 Part 4 Q" where n = i Attempts: 0 of 3 used Submit Answer Formulate the System Equation with flowrate in units of gal/min. Write the system equation for this flow system as function of volume flowrate Q in gal/min. hp= + Q" where n = i eTextbook and Media Save for Later Using multiple attempts will impact your score. 10% score reduction after attempt 2 Part 5 Find the Operating Point for a Pump and System (a) What is the volume flowrate at the operating point in gal/min? Q= gal/min (b) What is the pump head at this flow rate? hp- ft Attempts: 0 of 3 used Submit Answer (c) What is the power in horsepower (hp) added to the system by the pump for this value of pump head? W shaft hp
Due to fouling of the pipe wall, the friction factor for the pipe of Example 12.4 increases from 0.02 to 0.03. Determine the new flowrate, assuming all other conditions remain the same. What is the pump efficiency at this new flowrate? Explain how a line valve could be used to vary the flowrate through the pipe of Example 12.4. Would it be better to place the valve upstream or downstream of the pump? Why? K₁ = 1.5 Water K₁₂ = 1.0 Az= 10t Diameter of pipe 6 in. Pump Total pipe length 200 ft K₁ = 0.5 100 (1) 80 Head de 60 40 -Efficiency 20 (a) 400 800 1200 1600 2000 2400 Flowrate, gal/min (b) Part 1 Write the system equation for this flow system with the original friction factor as function of velocity V in ft/s. hp= V" where n = i eTextbook and Media Save for Later Using multiple attempts will impact your score. 10% score reduction after attempt 2 Part 2 Attempts: 0 of 3 used Submit Answer Formulate the System Equation for the increased friction factor with velocity in units of ft/s. Write the system equation for this flow system with the increased friction factor as function of velocity V in ft/s. hp= + i V" where n = i Part 3 Formulate the System Equation with flowrate in units of ft³/s. Write the system equation for this flow system as function of volume flowrate Q in ft³/s. hp= eTextbook and Media Save for Later + i Using multiple attempts will impact your score. 10% score reduction after attempt 2 Part 4 Q" where n = i Attempts: 0 of 3 used Submit Answer Formulate the System Equation with flowrate in units of gal/min. Write the system equation for this flow system as function of volume flowrate Q in gal/min. hp= + Q" where n = i eTextbook and Media Save for Later Using multiple attempts will impact your score. 10% score reduction after attempt 2 Part 5 Find the Operating Point for a Pump and System (a) What is the volume flowrate at the operating point in gal/min? Q= gal/min (b) What is the pump head at this flow rate? hp- ft Attempts: 0 of 3 used Submit Answer (c) What is the power in horsepower (hp) added to the system by the pump for this value of pump head? W shaft hp
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Due to fouling of the pipe wall, the friction factor for the pipe of Example 12.4 increases from 0.02 to 0.03. Determine the new flowrate, assuming all other conditions remain the same. What is the pump efficiency at this new flowrate? Explain how a line valve could be used to vary the flowrate through the pipe of Example 12.4. Would it be better to place the valve upstream or downstream of the pump? Why?
Transcribed Image Text:Due to fouling of the pipe wall, the friction factor for the pipe of Example 12.4 increases from 0.02 to 0.03. Determine the new
flowrate, assuming all other conditions remain the same. What is the pump efficiency at this new flowrate? Explain how a line valve
could be used to vary the flowrate through the pipe of Example 12.4. Would it be better to place the valve upstream or downstream
of the pump? Why?
K₁ = 1.5
Water
K₁₂ = 1.0
Az= 10t
Diameter of pipe 6 in.
Pump
Total pipe length 200 ft
K₁ = 0.5
100
(1)
80
Head
de 60
40
-Efficiency
20
(a)
400
800
1200
1600
2000
2400
Flowrate, gal/min
(b)
Part 1
Write the system equation for this flow system with the original friction factor as function of velocity V in ft/s.
hp=
V" where n = i
eTextbook and Media
Save for Later
Using multiple attempts will impact your score.
10% score reduction after attempt 2
Part 2
Attempts: 0 of 3 used Submit Answer
Formulate the System Equation for the increased friction factor with velocity in units of ft/s.
Write the system equation for this flow system with the increased friction factor as function of velocity V in ft/s.
hp=
+ i
V" where n = i
Transcribed Image Text:Part 3
Formulate the System Equation with flowrate in units of ft³/s.
Write the system equation for this flow system as function of volume flowrate Q in ft³/s.
hp=
eTextbook and Media
Save for Later
+ i
Using multiple attempts will impact your score.
10% score reduction after attempt 2
Part 4
Q" where n = i
Attempts: 0 of 3 used Submit Answer
Formulate the System Equation with flowrate in units of gal/min.
Write the system equation for this flow system as function of volume flowrate Q in gal/min.
hp=
+
Q" where n = i
eTextbook and Media
Save for Later
Using multiple attempts will impact your score.
10% score reduction after attempt 2
Part 5
Find the Operating Point for a Pump and System
(a) What is the volume flowrate at the operating point in gal/min?
Q=
gal/min
(b) What is the pump head at this flow rate?
hp-
ft
Attempts: 0 of 3 used Submit Answer
(c) What is the power in horsepower (hp) added to the system by the pump for this value of pump head?
W shaft
hp
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