Boq of khadeja storage tank, well, and booster pumping station
LOID WELL NO. 5 WELL PUMP/BOOSTER STARTUP
Transcript of LOID WELL NO. 5 WELL PUMP/BOOSTER STARTUP
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LOID WELL NO. 5WELL PUMP/BOOSTER STARTUP
David Watkins, P.E.J-U-B ENGINEERS,Inc.
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Well No. 5
Constructed 2016
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Outline
• Design Considerations
– Irrigation/Domestic
– Well Field
– Future Tank
– High Pressure
• Construction Startup
– Anti-Reverse Ratchet
– Dual VFDs
– Safety Features
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Design Considerations
• Capacity
– 2,000 gpm Irrigation Water @ over 200 psi
– 1,000 gpm Domestic Water (Future)
• Well Pump
– Line Shaft Vertical Turbine
– 600 HP, 1800 RPM, Flowserve 15EMM 8-stage Pump
• Irrigation Booster Pump
– Horizontal Split Case Booster
– 400 HP, 1800 RPM, American Marsh 6x8-22 HD Pump
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Design Considerations
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Design Considerations
Future Tank
Pump to Waste
Domestic System
Irrigation System
Well Pump
Booster
Booster
Valve
Check Valve
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Well Pump Maintenance Access: skylight/hatch allows access to well
pump and provides natural light
Room Height: well pump motor dictates your room height, motor
inside the hatch = Heat
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Irrigation Booster Pump
Horizontal Shaft: requires laser alignment
Maintenance Access: provide space on side for maintenance equipment
to pick motor/pump
Expansion Joint: helps reduce vibration in piping
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Electric Room
Smart HVAC: VFD heat vents to pump room when needed
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BuildingSkylight Hatch: for well pump removal
Double Door: allows large tool access to
well pump
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Building
Large Doors: allow maintenance equipment access to booster
pumps from both sides of building.
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Building
Pump to Waste: with appropriate mesh screens
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Design Considerations
• Irrigation/Domestic
– One well pump multiple booster pumps
• Irrigation Booster (Monitored Flow)
• Single or Dual Domestic Booster(s)
– Meets domestic water standards
– Future reduced pressure backflow preventer
– Temporary pipe paint
• Well Field
– Additional Drawdown
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Design Considerations
• Future Tank
– Adjacent tank in between well pump and
booster pump(s)
– Provide additional storage for domestic
system
• High Pressure
– Lower point in system
– Ductile iron well piping and yard piping
– VFDs allow ramp up and ramp down
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Construction Startup
Line Shaft Vertical Turbine Well Pump• Anti-Reverse Ratchet
– Protects motor and
electrical equipment
– Mechanical ratchet that
stops shaft from spinning
in reverse when water is
draining back down the
column
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Construction Startup
Line Shaft Vertical Turbine Well Pump• Anti-Reverse Ratchet
– Ratchet engages, slams,
engages, slams, etc.
– Extremely Loud
– Comes to rest
– Manufacturer theory:
• 800 ft x 12” Diameter Column
is about 20 tons of water
• Shaft flexes and reverses
spin
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Construction Startup
Line Shaft Vertical Turbine Well Pump• Anti-Reverse Ratchet
– VFD Program was
modified to slow speed
down to near stop before
cutting loose
– May still slam during an
immediate shutdown like
a power outage
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Construction Startup
• Dual VFDs
– Pros• Allows a wide variety of operations
• Allows a complex startup/shutdown that is protective of the system
• Well can target a strictly monitored flow at various operating conditions
– Cons• Complicated startup and programming challenges
• Short span of pipe between well and booster limits flexibility, and holds a high pressure
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Construction Startup
Split Case Booster
Well Pump
Check Valve
Pressure Gauge
Pressure Gauge
Check Valve
Pressure Gauge
Air Relief
VFD-Controlled Motors
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Construction Startup
Split Case Booster
Check Valve
Pressure Gauge
Pressure Gauge
Check Valve
Pressure Gauge
Air Relief
Well Pump
50 Hz
00 Hz
00 psi 170 psi 210 psi
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Construction Startup
Split Case Booster
Check Valve
Pressure Gauge
Pressure Gauge
Check Valve
Pressure Gauge
Air Relief
Well Pump
50 Hz
00 Hz
20 psi 170 psi 210 psi
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Construction Startup
Split Case Booster
Check Valve
Pressure Gauge
Pressure Gauge
Check Valve
Pressure Gauge
Air Relief
Well Pump
58 Hz
55 Hz
170 psi 170 psi 210 psi
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Construction Startup
Split Case Booster
Check Valve
Pressure Gauge
Pressure Gauge
Check Valve
Pressure Gauge
Air Relief
Well Pump
58 Hz
55 Hz
40 psi 210 psi 210 psi
2,000 GPMBooster VFD maintains
suction pressure
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Construction Startup
• Shutdown Sequence
– Almost the same as startup but reversed
• Booster slows until flow is near zero
• Booster shuts off
• Well pump slows to about 43 Hz, which is the
minimum speed before the well almost dead heads
• Well shuts off
• Reverse ratchet engages
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Construction Startup
• Safety Features
– Pressure Switches
– Zero Flow Timer
– Pump Motor Switches
• Vibration
• Overtemp
– Normal Shutdown for most alarms
• Protects well system and avoids potential shocks
to the water system
• Test them all during startup
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Questions?