PumpTech Customer Education

Transcription

1 PumpTech Customer Education Bellevue Moses Lake Canby

2 PumpTech Product Lines UL Listed Packaged Systems

3 Two full time Mechanical Engineers Licensed in OR, WA & ID SolidWorks & E-Drawings Viewer AutoCad Compatible Drawings All Systems UL QCZJ Listed Designed to HI Standards

4 Manufacturing Facility Canby, OR

5 Installation, Maintenance & Repair 9 Full Time Service Technicians 3 Full Service Shops 6 Service Trucks 23 Ton Crane Truck 8 Ton Crane Truck 3 Ton Crane Truck 2 Ton Flatbed & Trailer 1 Ton Flatbed & Trailer

6 Pipeline

7 Centrifugal Pump Training Series Centrifugal Pump Selection Joe Evans, Ph.D

8 * Pump Selection Pump Quality Pump Features Efficiency NPSH Curve Shape Window of Operation Affinity Laws

9 * Pump Quality & Features Quality Price Weight History Features Seals Coupling Materials

10 The Performance Curve Efficiency BEP BOP BEBOP

11 * Motor & Pump Efficiency Motor Efficiency = Mechanical Power / Electrical Power Pump Efficiency = Fluid Power / Mechanical Power Total Efficiency = Pump Efficiency X Motor Efficiency

12 * Motor & Pump Efficiency Total Efficiency = Pump Efficiency X Motor Efficiency 10 Bags 9 Bags 7 Bags Motor Pump Total 90 % 78 % 70 % 0.90 X 0.78 = 0.70 = 70%

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15 Wide Efficiency Range *

16 Narrow Efficiency Range *

17 Wide Efficiency Range *

18 Would You Select This Pump? * 38%

19 Vortex Action *

20 Vortex vs Non Clog *

21 * NPSH - Net Positive Suction Head Two Types NPSHr & NPSHa In simple terms, NPSHr is the amount of pressure required at the pump s suction to prevent damaging cavitation. It is a function of pump design.

22 Relatively Low NPSHr Suction BEP = 15

23 Relatively High NPSHr Suction

24 Eye Diameter Effect on NPSHr Pump Ed 101

25 Stable Window of Operation Suction Specific Speed Suction Pump Ed 101

26 Suction Recirculation Cavitation Occurs on the high pressure side of the vane Pump Ed

27 Suction Recirculation Cavitation

28 Radial Thrust A force that acts perpendicularly to the pump shaft Forms about the periphery of the impeller due to uneven volute geometry A function of total head and the width and diameter of the impeller Usually reaches a maximum at or near shut off head

29 Radial Thrust - Problems Causes Excess Shaft Deflection Increased Seal Wear Increased Wear Ring Wear Increased Radial Bearing Load Vibration Fixes? Increase Shaft Diameter or Shorten Overhang Best Fix Operate at BEBOP

30 Percent Radial Thrust Radial Thrust versus % BEP Flow Radial Thrust Percent BEP Flow Pump Ed

31 Radial Thrust Calculator

32 Off BEBOP Flows - Recirculation Three types of recirculation can occur when a pump is operated to the left side of the performance curve. Normal recirculation increases with wear ring clearance & reduced flow. Suction & Discharge recirculation increase as flow is reduced. The resulting recirculation cavitation will cause internal damage over time. Pump Ed

33 Wastewater Pump Designs Nonclog Vortex Monovane Chopper Suction

34 Suction

35 * Curve Shape The shape and slope of the performance curve can have a significant effect upon pump selection.

36 Pump Specific Speed * Curve

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39 Head in Feet * Constant Pressure PRV Control HP HP HP Pump 1 Pump 2 System Low Level HP = (flow x head) / (3960 x eff) Gallons Per Minute

40 Head in Feet * Pump Pump Down Data Labels Are BHP Pump 1 Pump 2 System Low Level Gallons Per Minute

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42 Parallel Pumps Constant Speed *

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48 Head in feet Flat Curve 2.5 X 3 X RPM * Data Label values are BHP hz 55hz System Gallons Per Minute

49 Head in feet X 4 X 7B 3450 RPM Steeper Curve * % 81% Data Labels are BHP % hz 55hz 40 50hz 45hz 20 System Gallons Per Minute

50 Head in feet * Level Control Pump Power Down Savings 60 Submersible Non Clog S12L RPM " Trim Data Label values are BHP hz 77% eff hp/gal 78% eff hp/gal 77% eff hp/gal 10 System Low Level Gallons Per Minute

51 Head in feet Level Control Level Control Power Savings Submersible Non Clog S12L RPM " Trim Data Label values are BHP * hz 55hz 50hz 45hz % eff 13.1 hp hp/gal % eff 16.8 hp hp/gal % eff 21.8 hp hp/gal % eff 27.3 hp hp/gal % eff 33.2 hp hp/gal System Gallons Per Minute

52 VFD Control Circulation *

53 Head in ft Closed Loop Total Friction VFD Control Circulation * Pipe 600ft 8in Steel Heat Exchanger Heater System Curve Gallons Per Minute

54 Head in Ft 6 X 6 X 12B VFD Control Closed Loop Circulation vf/vp hp 86% 44 hz 22.4 hp 87% 60 hz 60hz 55hz 50hz 45hz 40hz 35hz 30hz System hp 85% 31 hz Gallons Per Minute

55 Head in Ft * Open Loop Circulation vf/vp 4 X 5 X 9A VFD Control hp 75% 60 hz hp 77% 38 hz 3 hp 77% 45 hz 4.9 hp 76% 53 hz 60hz 55hz 50hz 45hz 40hz 35hz 30hz System Gallons Per Minute

56 *

57 Head in feet * Pump Head vs System Head 250 Cornell 5RB 1780 RPM 13.5" Trim hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = feet Gallons Per Minute

58 Head in feet * Pump Hydraulic Efficiency vs System Head 250 Cornell 5RB 1780 RPM 13.5" Trim % 72% 80% 84% 60% 72% 86% 80% 84% 86% 60% 72% 86% 80% 84% 86% 60% 86% 72% 80% 86% 83% 84% 86% 60% 72% 83% 80% 86% 84% 86% 60% 83% 72% 74% 80% 86% 84% 86% 83% 74% 60% 72% 86% 80% 84% 86% 83% 74% 86% 83% 74% 74% 83% 74% 74% 60hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = Pump Ef Gallons Per Minute

59 Head in feet * Pump BHP vs System Head 250 Cornell 5RB 1780 RPM 13.5" Trim hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = BHP Gallons Per Minute

60 Head in feet * Power / 1000 Gallons Pumped 250 Cornell 5RB 1780 RPM 13.5" Trim hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = kw / 1000 Gal Gallons Per Minute

61 Head in feet * Cost / 1000 Gallons Pumped 250 Cornell 5RB 1780 RPM 13.5" Trim hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = $$ / 1000 Gal Gallons Per Minute

62 VFD Control Multiple Pumps * 2 Pumps 1 Drive 2 Pumps 1 Drive & Contactors 2 Pumps 2 Drives

63 *

64 Head in feet * Vertical Multistage (25HP) % 25% 25% 25% 45% 55% 60% 45% 55% 60% 67% 45% 55% 60% 67% 45% 55% 60% 67% 72% 67% 72% 72% 72% 78% 78% 76% 78% Data Label values are Hydraulic Efficiency 76% 78% 76% 76% 60hz 55hz 50hz 45hz System Gallons Per Minute

65 Head in feet * Vertical Multistage (25HP) % 25% 25% 25% 45% 55% 60% 45% 55% 60% 67% 45% 55% 60% 67% 45% 55% 60% 67% 72% 67% 72% 72% 72% 78% 78% 76% 78% Data Label values are Hydraulic Efficiency 76% 78% 76% 76% System D60 D55 D50 D Gallons Per Minute

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67 Centrifugal Pump Training Series Centrifugal Pump Selection Joe Evans, Ph.D