Pro/Forums - View Single Post - How much pump is enough? How much is too much?

bobo5195 · 05-20-2007, 10:32 AM

off the top of my head and really badly remembered and probably wrong:

A really bad pump as a peak eff of about 9%
A normal cheaply made pump eff of 30%
a well made cheap pump with 2D rotor is 40%
To get over 60% you need a 3D CNCed machine piece of kit.

My old lecturer used to have a turbo compressor in his office ( 1/4 million plus RPM for pumping air) i think he said that it was 96% eff but it looked like it cost at least $100 to machine and air is alot easier to move than water.

It is easy to make a cheap pump that performs good enough with injection moulding. The complex shaped air turbos are hard as nails to make.

05-20-2007, 10:32 AM	#250
bobo5195 Cooling Savant Join Date: Aug 2005 Location: uk Posts: 400	Re: How much pump is enough? How much is too much? off the top of my head and really badly remembered and probably wrong: A really bad pump as a peak eff of about 9% A normal cheaply made pump eff of 30% a well made cheap pump with 2D rotor is 40% To get over 60% you need a 3D CNCed machine piece of kit. My old lecturer used to have a turbo compressor in his office ( 1/4 million plus RPM for pumping air) i think he said that it was 96% eff but it looked like it cost at least $100 to machine and air is alot easier to move than water. It is easy to make a cheap pump that performs good enough with injection moulding. The complex shaped air turbos are hard as nails to make.