Page 2 of 2 FirstFirst 12
Results 16 to 18 of 18
  1. #16
    Join Date
    Mar 2010
    Location
    Newcastle
    Posts
    47

    Default

    Quote Originally Posted by BobL View Post
    I hope he has a air meter that can measure fast air speeds. is I said air flow in AC is usually much smaller than DC.
    Yep that remains to be seen, he put his hand under the duct and guessed about 20m/s which may not be that far off but I gather he has appropriate gear. I was more intersested in whether, assuming it can be done accurately, it is worthwhile testing with the different blast gates open to see how effective the various machine connections are and whether we're in the ball park flow wise. I'm also curious as to whether the enclosure causes resistance - ie would try with some panels removed.

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. #17
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,792

    Default

    I hope you can get 1200 CFM which is ~0.6m^3/s thru a 150mm duct.
    If this is evenly distributed cross a 150mm duct that's an air speed of 33 m/s
    But the air is not evenly distributed across the and can be up to 1.4x faster in the middle of the duct compared to the average speed so about 47 m/s - not many meters can measure that speed.
    That's why a larger test duct is used.

  4. #18
    Join Date
    Jan 2014
    Location
    Brisbane, Australia
    Posts
    47

    Default

    Interesting to know, thanks for that info.

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Workshop dust extraction noise
    By sells07 in forum WOODWORK - GENERAL
    Replies: 1
    Last Post: 25th May 2016, 04:54 PM
  2. Dust extraction in my new workshop
    By groeneaj in forum DUST EXTRACTION
    Replies: 39
    Last Post: 11th August 2013, 05:12 PM
  3. Dust extraction upgrade at Roy Schack's workshop
    By pjt in forum DUST EXTRACTION
    Replies: 15
    Last Post: 8th July 2013, 11:44 PM
  4. Workshop Dust extraction
    By geoffa in forum DUST EXTRACTION
    Replies: 10
    Last Post: 13th July 2004, 07:11 PM
  5. Dust Extraction for School Workshop
    By Chris Parker in forum DUST EXTRACTION
    Replies: 7
    Last Post: 5th November 2003, 07:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •