Results 1 to 4 of 4
  1. #1
    Join Date
    Aug 2009
    Location
    Dartford
    Age
    34
    Posts
    88
    Rep Power
    15

    HELP!! KW duty formula



    Some one has asked me this. I dont have a clue ive hardly worked on chillers. But am learning them now. Can some one please help me


    Chiller duty.*Kw= Flow (l/s) x temp diff (k) x 4.186 (s.g water). To find flow reverse this formula.*Therefore what is the kw duty where flow rate is 15 l/s and TD k is 4.5c.



  2. #2
    Join Date
    Aug 2001
    Location
    Gold Coast, Australia
    Posts
    601
    Rep Power
    28

    Re: HELP!! KW duty formula

    282.555kW I think the comment about reversing the flow confused you. Or maybe you typed the wrong question? Or maybe I'm completely missing the point?

  3. #3
    Join Date
    Aug 2009
    Location
    Dartford
    Age
    34
    Posts
    88
    Rep Power
    15

    Re: HELP!! KW duty formula

    Yeah your right thats the answer but he wont explain it. Could you explain it to me please? He said if I know what s g water means i would understand but I really dont. I know it means specific gravity. But I need help understanding it.

    Cheers
    Last edited by Deano240; 14-06-2013 at 02:08 PM.

  4. #4
    Join Date
    Feb 2007
    Location
    UK
    Posts
    2,479
    Rep Power
    45

    Re: HELP!! KW duty formula

    OK,
    Look at it slightly different...

    If you got a weight and you move it a distance, you agree that the work you carry out could be described as kg x m?

    Now, the flow multiplied by the specific gravity is your weight and the temperature differential (Delta T) is your distance.

    The easier way to look at your formula is:
    kW = ( l/s x 4.186 ) x K
    or
    Work carried out = weight x distance.



    .

Posting Permissions

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