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Basic Question 3
- Thread starter noel0589
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I would say:
Atted a class at a recognised college/univerisity and get some basic knwoledge of unit operation.
You may also like to check:
Best regards
Morten
Atted a class at a recognised college/univerisity and get some basic knwoledge of unit operation.
You may also like to check:
Best regards
Morten
Another good website to check out is
HamishMcTavish
Nuclear
Try
Regards, HM
No more things should be presumed to exist than are absolutely necessary - William of Occam
Regards, HM
No more things should be presumed to exist than are absolutely necessary - William of Occam
It is a local rep, but good enough to make a brief answer of what u r asking
Thx
Thx
MikeHalloran
Mechanical
1. Their external appearances differ.
2. Their behaviors differ:
- A rotary pump, of which there are dozens of subtypes, behaves like a constant current source.
- A reciprocating pump behaves like a constant current square wave source, e.g. a charge pump. Multicylinder recips behave like a polyphase charge pump.
- A centrifugal pump, of which there are several subtypes, behaves like a constant voltage source at low flows, and like a constant current source at low pressures. In between, where its best efficiency lies, it sort of transitions between the asymptotes.
All are parametrically linear in flow with shaft speed, to a first approximation.
In general,
- Rotary pumps are used at modest pressures, where uniform flow is an important characteristic.
- Recips are used to develop high pressures. Their output has a lot of 'AC' in it.
- Centrifugals are used where a compliant source can be tolerated or is a good thing. They are generally cheap, durable, and dirt- tolerant.
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
2. Their behaviors differ:
- A rotary pump, of which there are dozens of subtypes, behaves like a constant current source.
- A reciprocating pump behaves like a constant current square wave source, e.g. a charge pump. Multicylinder recips behave like a polyphase charge pump.
- A centrifugal pump, of which there are several subtypes, behaves like a constant voltage source at low flows, and like a constant current source at low pressures. In between, where its best efficiency lies, it sort of transitions between the asymptotes.
All are parametrically linear in flow with shaft speed, to a first approximation.
In general,
- Rotary pumps are used at modest pressures, where uniform flow is an important characteristic.
- Recips are used to develop high pressures. Their output has a lot of 'AC' in it.
- Centrifugals are used where a compliant source can be tolerated or is a good thing. They are generally cheap, durable, and dirt- tolerant.
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
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