文档介绍：Chapter 8 Transportation and metering of fluid
1. Transportation of fluids, both liquids and gases.
2. Metering of fluid: flowmeters
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Energy needed to transport fluid
J/kg
J/N,m
Pa, J/m3
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Classification of transportation devices:
Transporting Liquid: pump
Centrifugal pump离心泵
Positive-displacement pump正位移泵
Transporting Gas:
Fan 通风机
Blower 鼓风机
Compressor 压缩机
Vacuum pump 真空泵
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1.       Centrifugal pump
. Centrifugal pump
. Performance characteristics and characteristic curves
. Variation of pump characteristic curves
. Piping system characteristic curve and Operating point (Duty point)
. Flow rate control
. How to select a pump and operate the pump correctly.(air binding, cavitation)
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. Centrifugal pump
Structure and main parts of a centrifugal pump
Structure: impeller, volute, shaft gland, suction inlet, discharge outlet
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. Variation of pump characteristic curves
Change of density
Change of viscosity
Change of impeller diameter
Change of impeller speed(RPM)
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. Piping system characteristic curve and Operating point (Duty point)
Piping system characteristic curve
He: J/N, m qe: m3/h
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q
H
a
b
p
P: Operating point
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