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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

Presentation by:

Tom Charles, P.E., DEE

Jim Kriss, P.E.

Jennifer Wendrowski, E.I.T.

September 2004

eccv h 2 06 water supply facility

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

alternative no 1 base model
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

alternative no 2 inline booster model

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

alternative no 3 booster injection model

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

pump selection vsd versus csd
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
2 duty vfd pumps 1 standby
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

5 duty csp pumps 1 standby
5 Duty CSP Pumps, 1 Standby

BPS Pump Head/System Curve – 30 inch North Pipeline

Floway: 14 JKH (6 stg, 1770 rpm) 5 pumps

operating cost comparison
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
operating cost comparison19
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