View Full Version : HELP!! KW duty formula

Deano240

14-06-2013, 11:35 AM

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.

FreezerGeezer

14-06-2013, 11:55 AM

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?

Deano240

14-06-2013, 02:02 PM

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

The Viking

14-06-2013, 02:47 PM

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.

:cool:

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