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Pumps

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Pumps Lectures 1 Outline: Where are pumps used Pumps, fans, compressor differences General HP and mechanical efficiency Types of Pumps Displacement – PowerPoint PPT presentation

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Title: Pumps


1
Pumps Lectures 1
  • Outline
  • Where are pumps used
  • Pumps, fans, compressor differences
  • General HP and mechanical efficiency
  • Types of Pumps
  • Displacement
  • Dynamic
  • HW9 Due 3/24 (download) or handout in class
  • Reading
  • Handouts
  • ITT Goulds Pumps Centrifugal Pump Fundamentals
    (in class) read all for 3/24
  • Fluide Design Inc. Centrifugal Pump Fundamentals
    (download)

Dr. C. L. Jones Biosystems and Ag. Engineering
2
Pumps, Fans, Compressors--Turbomachines
  • Turbomachines change energy level of flowing
    fluid by means of momentum exchange
  • 2nd only to electric motors in number
  • Wide spread in ALL industries
  • Power units cars/trucks, tractors
  • Computers
  • Grain elevators
  • Oilfield
  • Water supply/treatment
  • Food processing
  • And.

Dr. C. L. Jones Biosystems and Ag. Engineering
3
Pumps, Fans, Compressors--Turbomachines
  • Differences between pumps, fans, compressors
  • Pumps move liquids
  • Fans move gases with little increase in
    pressure
  • Compressors move gases with greater increase in
    pressure

Dr. C. L. Jones Biosystems and Ag. Engineering
4
Mechanical Efficiency
  • Ratio
  • Power Output
  • English Units, HP
  • Efficiency

Dr. C. L. Jones Biosystems and Ag. Engineering
5
Pump example 1
  • A pump provides 0.009 m3/s of water and total
    head of 10.6 m. Determine the power output of
    the pump. If the power input is 1310 W,
    determine the mechanical efficiency of the pump.
  • Pump Example 2, English Units
  • Will be shown in class

6
Pumps
  • Two types

Flow rates Pressure Flow characteristics
Displacement - plunger - piston - rotary Low High Pulsating
Dynamic - centrifugal - jet - airlift High Low Steady Flow
Dr. C. L. Jones Biosystems and Ag. Engineering
7
Displacement Pumps
Dr. C. L. Jones Biosystems and Ag. Engineering
8
Displacement Pumps
  • Reciprocating and Piston Pumps
  • Crank
  • Connecting rods
  • Pistons or plungers
  • Vol. efficiencies gt 97, Mech. eff. approx. 90
  • For more stable flow, increase number of cylinders

Dr. C. L. Jones Biosystems and Ag. Engineering
9
Displacement Pumps
  • Rotary Pumps (gear, lobe, screw, vane)
  • Most popular gear pumps
  • 90 mechanical eff.
  • Relatively constant output

Dr. C. L. Jones Biosystems and Ag. Engineering
10
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11
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12
Dynamic Pumps
  • Centrifugal
  • Relative simplicity
  • Mech. eff. as high as 90
  • Can handle fluids containing suspended solids
  • Ease of maintenancegood for food products
  • 2 parts impeller and casing
  • Radial, mixed, axial flow

Dr. C. L. Jones Biosystems and Ag. Engineering
13
Dr. C. L. Jones Biosystems and Ag. Engineering
14
Performance Curves
Dr. C. L. Jones Biosystems and Ag. Engineering
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