Pump Operational Flexibility & Optimization Pat Carney Flow-Technics Inc. Flow-Technics Inc1.

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Presentation transcript:

Pump Operational Flexibility & Optimization Pat Carney Flow-Technics Inc. Flow-Technics Inc1

Topics of Discussion Evaluations/Considerations Flexibility & Optimization Options Examples Conclusions Flow-Technics Inc2

Evaluations/Considerations Characteristics of System Head Curve Operational Considerations Pump Characteristics Flow-Technics Inc3

System Head Characteristics Components Static Head Frictional Head Velocity Head Characteristics Flat Steep Flow-Technics Inc4

System Head Curve Flat Curve Steep Curve Flow-Technics Inc5

Operational Considerations Electrical Cost/Efficiency Flow Rate Flexibility Controllability All of the above Flow-Technics Inc6

Pump Characteristics Shape of the Curve Efficiency NPSHr Flow-Technics Inc7

Pump Curve – Flat Curve Flow-Technics Inc8

Pump Curve - Steep Flow-Technics Inc9

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 Inc10

Single Pump vs. Multi-Pump Single Pump Multi - Pump Flow-Technics Inc11

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 Inc12

Constant vs. Variable Speed Constant Speed Variable Speed Flow-Technics Inc13

Constant vs. Variable Evaluation Constant Speed Variable 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 Inc14

Constant vs. Variable (Example #1)

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

Optimization Review - Unacceptable Spec Requirement ’ TDH (2 Pumps Running) Submittal Review Single Pump Operation Static Head 28’ Unacceptable Flow-Technics Inc17

Optimization Review - Acceptable Spec Requirement: ’ TDH (2 Pumps Running) Static Head: 58’ Submittal Review: Single Pump Operation Static Head: 28’ Acceptable Flow-Technics Inc18

Theoretical vs. Actual Flow-Technics Inc19

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 Inc20

2 Pumps Reduced Speed Flow-Technics Inc21

Conclusions Understand System Characteristics Design Criteria Operational Criteria Communication!! Flow-Technics Inc22