Pumps Lectures 1
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Pumps Lectures 1

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2. . Dr. C. L. JonesBiosystems and Ag. Engineering. Pumps, Fans, Compressors--Turbomachines. Turbomachines: change energy level of flowing fluid by means of momentum exchange2nd only to electric motors in numberWide spread in ALL industriesPower units: cars/trucks, tractorsComputersGrain elev
Pumps Lectures 1

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1. 1 Pumps ? 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)

2. 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??.

3. 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

4. 4 Mechanical Efficiency Ratio: Power Output: English Units, HP: Efficiency

5. 5 Pump example 1 A pump provides 0.009 m^3/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. 6 Pumps Two types

7. 7 Displacement Pumps

8. 8 Displacement Pumps Reciprocating and Piston Pumps Crank Connecting rods Pistons or plungers Vol. efficiencies > 97%, Mech. eff. approx. 90% For more stable flow, increase number of cylinders

9. 9 Displacement Pumps Rotary Pumps (gear, lobe, screw, vane) Most popular: gear pumps 90%+ mechanical eff. Relatively constant output

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11. 11

12. 12 Dynamic Pumps Centrifugal Relative simplicity Mech. eff. as high as 90% Can handle fluids containing suspended solids Ease of maintenance?good for food products 2 parts: impeller and casing Radial, mixed, axial flow

13. 13

14. 14 Performance Curves


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