Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

LOID WELL NO. 5WELL PUMP/BOOSTER STARTUP

David Watkins, P.E.J-U-B ENGINEERS,Inc.

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Well No. 5

Constructed 2016

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Outline

• Design Considerations

– Irrigation/Domestic

– Well Field

– Future Tank

– High Pressure

• Construction Startup

– Anti-Reverse Ratchet

– Dual VFDs

– Safety Features

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Design Considerations

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Design Considerations

Future Tank

Pump to Waste

Domestic System

Irrigation System

Well Pump

Booster

Booster

Valve

Check Valve

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Electric Room

Smart HVAC: VFD heat vents to pump room when needed

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

BuildingSkylight Hatch: for well pump removal

Double Door: allows large tool access to

well pump

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Building

Large Doors: allow maintenance equipment access to booster

pumps from both sides of building.

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Building

Pump to Waste: with appropriate mesh screens

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Construction Startup

Split Case Booster

Well Pump

Check Valve

Pressure Gauge

Pressure Gauge

Check Valve

Pressure Gauge

Air Relief

VFD-Controlled Motors

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

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

Local. Trusted. Advisors. J-U-B ENGINEERS, INC.

Questions?