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Hydraulic Optimization of the Northern Water Supply System

Hydraulic Optimization of the Northern Water Supply System . Presentation by: Tom Charles, P.E., DEE Jim Kriss, P.E. Jennifer Wendrowski, E.I.T. September 2004. WTP & High Service PS. ECCV H 2 06 Water Supply Facility. Renewable Water Supply Source Alluvial Wells and Delivery Network

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Hydraulic Optimization of the Northern Water Supply System

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  1. Hydraulic Optimization of the Northern Water Supply System Presentation by: Tom Charles, P.E., DEE Jim Kriss, P.E. Jennifer Wendrowski, E.I.T. September 2004

  2. WTP & High Service PS ECCV H206 Water Supply Facility • Renewable Water Supply Source • Alluvial Wells and Delivery Network • Reverse Osmosis Treatment Plant • 32 Mile Transmission Pipeline • 2 Pump Stations • Phase 2 Improvements (Future) Booster PS Smoky HillStorage

  3. Alternative No. 1 – Base Model 409 psi 10 MGD • System Consists of • RO WTP • HSPS • BPS-1 + Tank • Storage Tanks • 32 miles of 24-inch pipe • Problem: high discharge pressure from HSPS 24” f 324 psi

  4. 143 psi Alternative No.2 – Inline Booster Model 24” f 10 MGD 205 psi • System Consists of: • RO WTP • HSPS • In-line BPS-2 + Tank • BPS-1 + Tank • Storage Tanks • 7 miles of 24-inch pipe • 25 miles of 30-inch pipe 13 MGD 30” f 274 psi

  5. 360 psi Alternative No.3 – Booster Injection Model 24” f 10 MGD • System Consists of: • RO WTP • HSPS • Injection BPS-2 + Tank • BPS-1 + Tank • Storage Tanks • 7 miles of 24-inch pipe • 25 miles of 30-inch pipe 213 psi 13 MGD 30” f 266 psi

  6. J-10 J-102 J-11 Alternative 1 - Pressure Trace for Suction/Discharge (No Controls)

  7. Alternative 1 - HGL Envelope (No Controls) Smoky Hill BPS 1 HSPS

  8. J-10 J-102 J-11 Alternative 1 - Pressure Trace for Suction/Discharge (With Controls)

  9. Alternative 1 - HGL Envelope (With Controls) Smoky Hill BPS 1 HSPS

  10. Alternative 2 - Pressure Trace for Suction/Discharge (No Controls) J-10 J-11 J-4

  11. Alternative 2 - HGL Envelope (No Controls) Smoky Hill BPS 1 BPS 2 HSPS

  12. J-10 J-11 J-4 Alternative 2 - Pressure Trace for Suction/Discharge (With Controls)

  13. Alternative 2 - HGL Envelope (With Controls) Smoky Hill BPS 1 BPS 2 HSPS

  14. Pump Selection - VSD versus CSD • Meet System Operating Requirements • Match RO Membrane Skid Production • Minimize Tank Fluctuations • Minimize Pump Cycle Time • Minimize Capital and Operating Costs • Minimize Pump Room Footprint

  15. 2 Duty VFD Pumps, 1 Standby BPS Pump Head/System Curve – 30 inch North Pipeline Floway: 18 MKH (5 stg, 1770 rpm, 11.875” trim), 2 VFDs

  16. 5 Duty CSP Pumps, 1 Standby BPS Pump Head/System Curve – 30 inch North Pipeline Floway: 14 JKH (6 stg, 1770 rpm) 5 pumps

  17. Operating Cost Comparison • VSP/ CSP Capital Costs Similar • Justify VFD Capital Cost? • Annual Billing Estimates • Present Worth Analysis • Pump Power Use for Flow Targets • Monthly Demand Distribution • System Operation • Intermittent Winter Operation • Max Capacity during Summer Peak

  18. Pump Power Requirements

  19. Operating Cost Comparison • VSP/ CSP Capital Costs Similar • Justify VFD Capital Cost? • Annual Billing Estimates • Present Worth Analysis • Pump Power Use for Flow Targets • Monthly Demand Distribution • System Operation • Intermittent Winter Operation • Max Capacity during Summer Peak

  20. Variable Speed Billing Estimate

  21. Constant Speed Billing Estimate

  22. Questions & Answers

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