Title: Pumps
1Pumps Lectures 1
- Outline
- Where are pumps used
- Pumps, fans, compressor differences
- General HP and mechanical efficiency
- Types of Pumps
- Displacement
- Dynamic
- Reading
- Handouts
- ITT Goulds Pumps Centrifugal Pump Fundamentals
(in class) read all - Fluide Design Inc. Centrifugal Pump Fundamentals
(download)
Dr. C. L. Jones Biosystems and Ag. Engineering
2Pumps, 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
3Pumps, 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
4Mechanical Efficiency
- Ratio
- Power Output
- English Units, HP
- Efficiency
Dr. C. L. Jones Biosystems and Ag. Engineering
5Pump 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
6Pumps
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
7Displacement Pumps
Dr. C. L. Jones Biosystems and Ag. Engineering
8Displacement 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
9Displacement 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
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12Dynamic 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
13Dr. C. L. Jones Biosystems and Ag. Engineering
14Performance Curves
Dr. C. L. Jones Biosystems and Ag. Engineering