×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Air Flow Sound Level

Air Flow Sound Level

Air Flow Sound Level

(OP)
I have a construction  project going on were there is a dust collection system under installation, the system will handle 4,000 cfm. How can I calculate the noise level for the air flow.

RE: Air Flow Sound Level

joan, I don't know if you'll get a response with that question. There are way too many unknowns - opening size, duct length, duct lining, sound attenuation, vibration isolation, manufacturer's noise output data, noise from the air? noise from the motor? from the fan? etc....

RE: Air Flow Sound Level

Joan: I tend to agree with Chas; however, the greatest indicator for the air moving system itself (exclusive of background sources) would be the velocity in the duct. For comfort "cooling" in inductrial applications, the maximum recommended velocity for 3,000 to 6,000 cfm high velocity systems is 3,000 fpm; which at 3,000 cfm would require a duct of 1 ft2 area.

HOWEVER: is this sufficient velocity to move the dust along?

I would think that perhaps the equipment producing the dust: sanders, planes, chippers, etc might produce more sound power than the collection system, in which case the quietest collection system wouldn't matter!

RE: Air Flow Sound Level

Joan,

Goorah also added some very good points.  The overall sound issue must be analyzed for all components.  The sound of the dust collector itself must be known and this data can usually be requested for the manufacturer.  The velocity of the duct will add noise but usually if there is industrial equipment running the duct noise will not be a major concern.  Also, what is being conveyed in the duct could be a factor.  If you have chunks, they can rattle and bang down the length of the duct.  Recommend evaluating the noise levels of all of the equipment before worrying about the noise level of the duct. You may not have much of a problem.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources