Previous in Forum: How to Calculate Process Filter Size   Next in Forum: Insulating Steam and Condensate Lines Together
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
5 comments
Rate Comments: Nested
tushar_shahinin
Participant

Join Date: May 2011
Posts: 1

CFM of the Fan

05/11/2011 8:40 AM

my fan impeller dia 1270 mm and width is 330 mm and rpm is 1234 what will be the cfm of the fan?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Anonymous Poster #1
#1

Re: CFM of the Fan

05/11/2011 10:02 AM

You also need pitch, twist and blade count. Just use an anemometer.
Register to Reply
ducon
Guru

Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
Posts: 1876
Good Answers: 19
#2

Re: CFM of the Fan

05/11/2011 11:42 PM

to continue further with what Anonymous has adviced , long on to:

www.ehow.com/how_6494748_calculte-cfm-rpms.html.

... a little googling would have helped.

__________________
 I not only use all the brains that I have, but all that I can borrow. Woodrow Wilson
Register to Reply Off Topic (Score 5)
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3

Re: CFM of the Fan

05/12/2011 3:52 AM

What does the original equipment manufacturer's performance curve say?

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Mukesh0861
Power-User

Join Date: Dec 2010
Posts: 377
Good Answers: 20
#4

Re: CFM of the Fan

05/13/2011 12:43 PM

With these data nobody on the earth can tell you CFM of your fan. Designers put their brain to design the optimum size for the for the best efficiency flow. If flow is not known you have to meassure it by meassuring velocity at the outlet cross section then you can use your maths.
Register to Reply
pritam
Guru
Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#5

Re: CFM of the Fan

05/19/2011 9:17 AM

Fan is designed to meet certain flow rate (cfm) and pressure at outlet (static or total). To answer your question some more data like fan type (centrifugal or axial),outlet pressure, impeller eye diameter. type of blading (radial, forward or backward curved), blade angle etc. are required.

However, assuming centrifugal fan with this limited data, I can say that it may give about 110,000 cfm.
Register to Reply
Register to Reply
Have a Different Question?
5 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); ducon (1); Mukesh0861 (1); pritam (1); PWSlack (1)

Previous in Forum: How to Calculate Process Filter Size   Next in Forum: Insulating Steam and Condensate Lines Together

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (61 right now)
Show Members
Advertisement