Transcription of PUMP DESIGN - Arrakis
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PUMP DESIGN - Arrakis
Arrakis 1 PUMP DESIGN PUMP DESIGN de Jongh & Rijs, editors Latest update: March 2004 Arrakis 2 PUMP DESIGN CONTENTS 1 Classification of Water pumps .. 3 piston pumps .. 4 Centrifugal pumps .. 7 2 The Single-acting piston Pump .. 8 Torque and 8 Volumetric and Mechanical Efficiency .. 11 Non-stationary Behaviour and Valve Response .. 12 3 Coupling of a Pump to a Wind Rotor .. 15 DESIGN Point Matching .. 16 Long Term Output and Output Availability .. 17 4 Pump Rod 19 Examination of Pump Rod 20 Pump Rod 23 5 Choosing the Pump 23 Matching the DESIGN Wind Speed .. 24 Choosing the Pump 26 Choosing the Pump Stroke .. 27 Controlling the Pump Rod 6 Choice of Materials .. 28 Pump 29 Cylinder .. 29 Pump 29 Rising 30 piston Sealing.
Centrifugal pumps are designed for optimal operation in their design point, i.e. at one determined pressure head and specific flow rate. Away from this design point, their efficiency drops rapidly. In windpumps, piston pumps are much more common than centrifugal pumps since their efficiency is less sensitive to fluctuations in head and speed.
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