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Making Better Decisions in an Uncertain World

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

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Making Better Decisions in an Uncertain World

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  1. Pump Station Simulation Making Better Decisions in an Uncertain World

  2. Webinar Overview • Modeling Pumps • Pump head-discharge relationship • System head curves • Pump controls • Pump power and cost • Examples

  3. Modeling Pumps • Power costs • Environmental controls • Facility upgrades • Risk management • System constraints • Operational decisions

  4. 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

  5. Pump Head Discharge Relationship Shutoff Head Power Function: Where hp = pump head ho = shutoff head Qp = pump discharge c, m = coefficients Design Point Maximum Flow

  6. Pump Curves

  7. System Head Curves Pump Head Pump Operating Point Headloss System Head Static Head

  8. System Curves

  9. Pump Efficiency Pump Operating Point 50 Pump Head 55 60

  10. Pump Controls System Sensor Pump Difference Reference Point Controller

  11. Deadband and Schmitt Trigger

  12. Pump Power and Cost • Pump Power: • Hp and Watts are time based • Accumulate for conversion to energy • Demand charges

  13. Questions? Jason Lillywhite, P.E. For a free trial version of the software, visit: www.goldsim.com

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