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Pump Station Simulation. Making Better Decisions in an Uncertain World. Webinar Overview. Modeling Pumps Pump head-discharge relationship System head curves Pump controls Pump power and cost Examples. Modeling Pumps. Power costs Environmental controls Facility upgrades - PowerPoint PPT Presentation
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©GoldSim Technology Group LLC., 2012
Making Better Decisions in an Uncertain World
Pump Station Simulation
©GoldSim Technology Group LLC., 2012
Webinar Overview
Modeling Pumps Pump head-discharge relationship System head curves Pump controls Pump power and cost Examples
©GoldSim Technology Group LLC., 2012
Modeling Pumps
Power costs Environmental controls Facility upgrades Risk management System constraints Operational decisions
©GoldSim Technology Group LLC., 2012
Methods
Simple mass balance with limits and targets– Monthly to annual timesteps– Focus is on limits of flow rather than the
ranges of flow Pump curves and control algorithms
– Accurate accounting of costs– Control theory– High friction losses in conveyance– Risk of failure, maintenance, replacement
©GoldSim Technology Group LLC., 2012
Pump Head Discharge Relationship
0 250 500 750 1000 1250 1500 17500.0
50.0
100.0
150.0
200.0f(x) = 12120.1191566445 x^-0.664495913901492
Flow (gpm)
Hea
d (ft
)
Shutoff Head
Design Point
Maximum Flow
Power Function:
Wherehp = pump headho = shutoff headQp = pump dischargec, m = coefficients
©GoldSim Technology Group LLC., 2012
Pump Curves
©GoldSim Technology Group LLC., 2012
0 250 500 750 1000 1250 1500 17500.0
50.0
100.0
150.0
200.0f(x) = 12120.1191566445 x^-0.664495913901492
Flow (gpm)
Hea
d (ft
)System Head Curves
Static Head
Headloss
Pump Operating Point
System Head
Pump Head
©GoldSim Technology Group LLC., 2012
System Curves
©GoldSim Technology Group LLC., 2012
0 250 500 750 1000 1250 1500 17500.0
50.0
100.0
150.0
200.0f(x) = 12120.1191566445 x^-0.664495913901492
Flow (gpm)
Hea
d (ft
)Pump Efficiency
Pump Operating PointPump Head50
5560
©GoldSim Technology Group LLC., 2012
Pump Controls
System
Sensor
DifferenceReference
Point
Controller
Pump
©GoldSim Technology Group LLC., 2012
Deadband and Schmitt Trigger
0 10 20 30 40 50 60 70 80 90 100110
115
120
125
130
135
140
LevelTargetPump OffPump On
Time (days)
Ele
vatio
n (ft
)
©GoldSim Technology Group LLC., 2012
Pump Power and Cost
Pump Power: Hp and Watts are time based Accumulate for conversion to energy Demand charges
©GoldSim Technology Group LLC., 2012
Questions?
Jason Lillywhite, P.E.
For a free trial version of the software, visit: www.goldsim.com
