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Pump Operational Flexibility & Optimization

Pump Operational Flexibility & Optimization. Pat Carney Flow-Technics Inc. Topics of Discussion. Evaluations/Considerations Flexibility & Optimization Options Examples Conclusions. Evaluations/Considerations. Characteristics of System Head Curve Operational Considerations

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Pump Operational Flexibility & Optimization

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  1. Pump Operational Flexibility & Optimization Pat Carney Flow-Technics Inc. Flow-Technics Inc

  2. Topics of Discussion • Evaluations/Considerations • Flexibility & Optimization Options • Examples • Conclusions Flow-Technics Inc

  3. Evaluations/Considerations • Characteristics of System Head Curve • Operational Considerations • Pump Characteristics Flow-Technics Inc

  4. System Head Characteristics • Components • Static Head • Frictional Head • Velocity Head • Characteristics • Flat • Steep Flow-Technics Inc

  5. System Head Curve Flat Curve Steep Curve Flow-Technics Inc

  6. Operational Considerations • Electrical Cost/Efficiency • Flow Rate Flexibility • Controllability • All of the above Flow-Technics Inc

  7. Pump Characteristics • Shape of the Curve • Efficiency • NPSHr Flow-Technics Inc

  8. Pump Curve – Flat Curve Flow-Technics Inc

  9. Pump Curve - Steep Flow-Technics Inc

  10. Operational & Optimization Options • Single Pump vs. Multi-Pump Consideration • Constant Speed vs. Multi-Speed • Combination of Both • Single vs. Multi Pump • Constant vs. Variable Speed Flow-Technics Inc

  11. Single Pump vs. Multi-Pump Single Pump Multi - Pump Flow-Technics Inc

  12. Single vs. Multi Pump Evaluation • Single Pump Two Pumps • Flow: 3500 GPM Flow: 3500 GPM total • Head: 65’ Head: 65’ • Eff: 68.8.% Eff: 81% • Rated Hp: 85.5 Rated Hp: 68.8(total) • NPSHr: 17.1’ NPSHr: 9.6’ • Connected Hp: 115 Connected Hp: 94(total) Flow-Technics Inc

  13. Constant vs. Variable Speed Constant Speed Variable Speed Flow-Technics Inc

  14. Constant vs. Variable Evaluation • Constant SpeedVariable Speed • Flow: 2100 GPM Flow: 2100 GPM • Head: 45 Head: 45 • Eff: 80.8% Eff: 64.2% • Rated Hp: 29.3 Rated Hp: 36.8 Max Daily: 17 hp for variable operation Ave Day: 15 hp Low Flow: 10 hp Flow-Technics Inc

  15. Constant vs. Variable (Example #1)

  16. Constant vs. Variable (Example #2) • Flat System Curve • Steep Pump Curve • Limited Operating Range • VFD vs. Cost Evaluation

  17. Optimization Review - Unacceptable Spec Requirement 2250 GPM @ 65’ TDH (2 Pumps Running) Submittal Review Single Pump Operation Static Head 28’ Unacceptable Flow-Technics Inc

  18. Optimization Review - Acceptable Spec Requirement: 2250 GPM @ 65’ TDH (2 Pumps Running) Static Head: 58’ Submittal Review: Single Pump Operation Static Head: 28’ Acceptable Flow-Technics Inc

  19. Theoretical vs. Actual Flow-Technics Inc

  20. Field Modifications With use of VFD, reduce speed to match actual system requirements. Evaluate 2 Pumps at reduced speed vs. 1 pump running Resize and replace Impeller Flow-Technics Inc

  21. 2 Pumps Reduced Speed Flow-Technics Inc

  22. Conclusions • Understand System Characteristics • Design Criteria • Operational Criteria • Communication!! Flow-Technics Inc

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