A building generates reuse water that is pumped from the treated effluent storage tank in the basement to a roof-top water tower. The force-main (pumped pipe) invert (lip of pipe) elevation for the fill connection to the water tower is 200 feet above the high-level float switch (pump turns on) and 215 feet above the low-level float switch (pump turns off) in the treated effluent storage tank. The force-main route between treated effluent storage tank and water tower requires 240 linear feet of pipe and includes twelve (12) x 90-degree elbows. The pipe connection to the treated effluent storage tank can be considered a fully submerged rounded pipe entrance. The pipe connection to the water- tower can be considered an abrupt exit to atmosphere. Additionally, there are three (3) wide open globe valves, one (1) disc type flow meter and one (1) swing check valve. All materials of construction are PVC Schedule 80 (note - okay for non-potable application but not potable). You are to design a multi-stage booster pump to transfer the effluent water to the water tower. The pump is surface installed next to the treated effluent storage tank at the same elevation as the tank invert, such that the pump operates with flooded suction and Net Positive Suction Head Available exceeds Net Positive Suction Head Required (i.e. you don't need to worry about this in your design). The following design practices should be adhered to: • Flow velocity in the force-main should be between 2-8 feet per second across the range of water elevations in the treated effluent storage tank • Duty point should be within the Preferred Operating Range (POR) and as close to the Best Efficiency Point (BEP) as possible. The pump is to transfer 1,000 gallons in ten minutes or less. The pump will be powered by three phase 480v power. On average the pump will transfer 30,000 gallons per day.
A building generates reuse water that is pumped from the treated effluent storage tank in the basement to a roof-top water tower. The force-main (pumped pipe) invert (lip of pipe) elevation for the fill connection to the water tower is 200 feet above the high-level float switch (pump turns on) and 215 feet above the low-level float switch (pump turns off) in the treated effluent storage tank. The force-main route between treated effluent storage tank and water tower requires 240 linear feet of pipe and includes twelve (12) x 90-degree elbows. The pipe connection to the treated effluent storage tank can be considered a fully submerged rounded pipe entrance. The pipe connection to the water- tower can be considered an abrupt exit to atmosphere. Additionally, there are three (3) wide open globe valves, one (1) disc type flow meter and one (1) swing check valve. All materials of construction are PVC Schedule 80 (note - okay for non-potable application but not potable). You are to design a multi-stage booster pump to transfer the effluent water to the water tower. The pump is surface installed next to the treated effluent storage tank at the same elevation as the tank invert, such that the pump operates with flooded suction and Net Positive Suction Head Available exceeds Net Positive Suction Head Required (i.e. you don't need to worry about this in your design). The following design practices should be adhered to: • Flow velocity in the force-main should be between 2-8 feet per second across the range of water elevations in the treated effluent storage tank • Duty point should be within the Preferred Operating Range (POR) and as close to the Best Efficiency Point (BEP) as possible. The pump is to transfer 1,000 gallons in ten minutes or less. The pump will be powered by three phase 480v power. On average the pump will transfer 30,000 gallons per day.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Draft a sketch of this system describe below
Transcribed Image Text:A building generates reuse water that is pumped from the treated effluent storage tank in the basement
to a roof-top water tower. The force-main (pumped pipe) invert (lip of pipe) elevation for the fill
connection to the water tower is 200 feet above the high-level float switch (pump turns on) and 215 feet
above the low-level float switch (pump turns off) in the treated effluent storage tank.
The force-main route between treated effluent storage tank and water tower requires 240 linear feet of
pipe and includes twelve (12) x 90-degree elbows. The pipe connection to the treated effluent storage
tank can be considered a fully submerged rounded pipe entrance. The pipe connection to the water-
tower can be considered an abrupt exit to atmosphere. Additionally, there are three (3) wide open globe
valves, one (1) disc type flow meter and one (1) swing check valve. All materials of construction are PVC
Schedule 80 (note - okay for non-potable application but not potable).
You are to design a multi-stage booster pump to transfer the effluent water to the water tower. The
pump is surface installed next to the treated effluent storage tank at the same elevation as the tank
invert, such that the pump operates with flooded suction and Net Positive Suction Head Available
exceeds Net Positive Suction Head Required (i.e. you don't need to worry about this in your design). The
following design practices should be adhered to:
Flow velocity in the force-main should be between 2-8 feet per second across the range of water
elevations in the treated effluent storage tank
• Duty point should be within the Preferred Operating Range (POR) and as close to the Best
Efficiency Point (BEP) as possible.
The pump is to transfer 1,000 gallons in ten minutes or less. The pump will be powered by three phase
480v power. On average the pump will transfer 30,000 gallons per day.
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