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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
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 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
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
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
J-10 J-102 J-11 Alternative 1 - Pressure Trace for Suction/Discharge (No Controls)
Alternative 1 - HGL Envelope (No Controls) Smoky Hill BPS 1 HSPS
J-10 J-102 J-11 Alternative 1 - Pressure Trace for Suction/Discharge (With Controls)
Alternative 1 - HGL Envelope (With Controls) Smoky Hill BPS 1 HSPS
Alternative 2 - Pressure Trace for Suction/Discharge (No Controls) J-10 J-11 J-4
Alternative 2 - HGL Envelope (No Controls) Smoky Hill BPS 1 BPS 2 HSPS
J-10 J-11 J-4 Alternative 2 - Pressure Trace for Suction/Discharge (With Controls)
Alternative 2 - HGL Envelope (With Controls) Smoky Hill BPS 1 BPS 2 HSPS
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 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 BPS Pump Head/System Curve – 30 inch North Pipeline Floway: 14 JKH (6 stg, 1770 rpm) 5 pumps
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 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