pumps and lift stations. background fluid moving equipment fluids are moved through flow systems...
TRANSCRIPT
![Page 1: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/1.jpg)
Pumps and Lift Pumps and Lift StationsStations
![Page 2: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/2.jpg)
BackgroundBackgroundFluid Moving Equipment
Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices increase the mechanical energy of the fluid. The additional energy can be used to increase
• Velocity (flow rate)• Pressure• Elevation
![Page 3: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/3.jpg)
Why are most water towers 130 feet high?
Because a column of water
2.31 ft high exerts a
pressure of 1 psi, and most
city water systems
operate at 50 to 60 psi
![Page 4: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/4.jpg)
![Page 5: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/5.jpg)
![Page 6: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/6.jpg)
![Page 7: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/7.jpg)
Static Head Difference in height
between source and destination
Independent of flow
destination
source
Statichead
Statichead
Flow
![Page 8: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/8.jpg)
Friction Head Resistance to flow in pipe and fittings
Depends on size, pipes, pipe fittings, flow rate, nature of
liquid
Proportional to square of flow rate
Frictionhead
Flow
![Page 9: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/9.jpg)
![Page 10: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/10.jpg)
The allowable limit to the suction head on a
pump
33 - friction losses through the pipe, elbows, foot valves and other
fittings on the suction side of the pump
Net Positive Suction Net Positive Suction HeadHead
![Page 11: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/11.jpg)
Determine the power required to pump 2000
gpmagainst a head of 14 ft, if the efficiency of the pump
is75% or 50%.
Power Requirement Power Requirement Example Example
![Page 12: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/12.jpg)
Power Power Requirement Requirement
Example Example
Lower efficiency means bigger motor and electrical controls, higher operating costs
![Page 13: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/13.jpg)
![Page 14: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/14.jpg)
![Page 15: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/15.jpg)
![Page 16: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/16.jpg)
DC = 0.375” per dayArea drained = 28 acresLift (from tile outlet in sump todischarge pipe outlet) = 6 ftLength of discharge pipe = 25 ftPump cycles per hour = 5 and 20.
Determine suitable sump size
Sump Sizing Sump Sizing Example Example
![Page 17: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/17.jpg)
Storage Volume (ft3) = 2 x Q (gpm)
n (cycles/hr)
Sump Sizing Sump Sizing Example Example
Area of a Circle = 3.14 x (Diameter)2
4 .
![Page 18: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/18.jpg)
Design Flowrate
Q = 18.9 x DC x A
Q = 18.9 x 0.375 x 28 = 198.5 gpm
Say use Q = 200 gpm
Sump Volume Calculation (5 cycles/hr)
Vol = 2 x Q / n
Vol = 2 x 200 / 5 = 80 ft3
![Page 19: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/19.jpg)
Min Required Volume = 80 ft3
-Try 4 ft diameter well
Area = 3.14 x 42 / 4 = 12.6 ft2
Storage Depth = 80 /12.6 = 6.35 ft
Try 6 ft diameter well
Area = p x 62 / 4 = 28.3 ft2
Storage Depth = 80 /28.3 = 2.83 ft
![Page 20: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/20.jpg)
![Page 21: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/21.jpg)
Flowrate varies with rotational speed:
Q1/Q2 = N1/N2
Head varies with rotational speed squared:
H1/H2 = (N1/N2)2
Power varies with rotational speed cubed:
P1/P2 = (N1/N2)3
AFFINITY LAWSAFFINITY LAWS
![Page 22: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/22.jpg)
A pump with an efficiency of 80%, connected to a diesel engine, pumps 200 gpm against a head of 12 ft. What is the power output of the engine? What will be the flow rate, head and power output if the motor speed is increased from 500 rpm to 600 rpm?
Affinity Laws Affinity Laws Example Example
![Page 23: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/23.jpg)
P =(200 x 12)/(3960 x 0.8) = 0.76 hp
Q2 = 200 x (600/500) = 240 gpm
H2 = 12 x (600/500)2 = 17.3 ft
P2 = 0.76 x (600/500)3 = 1.3 hp
Affinity Laws Affinity Laws Example Example
![Page 24: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/24.jpg)
![Page 25: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/25.jpg)
![Page 26: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/26.jpg)
![Page 27: Pumps and Lift Stations. Background Fluid Moving Equipment Fluids are moved through flow systems using pumps, fans, blowers, and compressors. Such devices](https://reader036.vdocuments.net/reader036/viewer/2022081519/56649e615503460f94b5d0ef/html5/thumbnails/27.jpg)