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Module 3 Pumps and Dimensional Analysis
Copyright Notice
Intended Learning Outcomes
Turbines & pumps
Positive displacement machines
Rotodynamic machines
Making a centrifugal pump
Basic principle
A pump adds energy to fluid
Turbine ~ pump in reverse
Changing a large turbine
Energy and Efficiency
Power & efficiency
Power & efficiency
Power & efficiency
Efficiency (%) = output / input
Calculating forces on a vane
Read Section 11.2 (pp. 381-392)
Pump Performance
Pump performance
Pump performance
Pump performance equations
From pp. 402-403...
Example 11.6
Example 11.9
Example 11.9 (continued)
Specific speed
Example 11.10
Pump Selection
Pump selection
Pump selection
Pump selection
Pump selection
Pump selection
Pump selection
Pump selection
Pump selection
Pump selection
Pump selection
HT = HS + hFS + HD + hFD
Rising main “system curve”
Murray Bridge-Onkaparinga
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Pumps in Series and Parallel
Pumps in series
Pumps in series
Pumps in parallel
Pumps in parallel
Example 11.12 (Excel)
Cavitation
Preventing cavitation
NPSH – a pump specification
Few Assumptions
Suppose a pump has NPSH=2.5m
Surge
Summary
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