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Thread: Tonnage to KW
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06-09-2010, 08:26 PM #1
Tonnage to KW
This may seem a dumb question but is there as mathematical equation to convert tons of cooling in to kw's i've googled but only found converters and would like to be able to work this out for myself
eg if i had a small chiller unit rated at 95 tonnes what would that equate to in KW'S
thanks
James
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06-09-2010, 08:29 PM #2
Re: Tonnage to KW
3.5 KW=1 ton refrigeration=12K BTU
95X3.5=332.5KW
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06-09-2010, 08:33 PM #3
Re: Tonnage to KW
Cheers Chemi by 12k btu am i right that you mean 12000
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06-09-2010, 11:33 PM #4
Re: Tonnage to KW
James10, 12k is short for 12,000.
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07-09-2010, 07:55 AM #5
Re: Tonnage to KW
Not BTU or KBTU but rather BTU/h or KBTU/h because it's a rate of energy (power).
To make progress is never good enough, I want to do better and better and better
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07-09-2010, 09:02 AM #6
Re: Tonnage to KW
Yeah Sandro, Isn't 1 british thermal unit raising 1 pound of water by 1 degree F/ hr? Having to dig into soggy memory now.
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07-09-2010, 09:09 AM #7
Re: Tonnage to KW
Yes as you said...per hour
To make progress is never good enough, I want to do better and better and better
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07-09-2010, 09:46 AM #8
Re: Tonnage to KW
God I love this site.......Btu's... I never knew thats what it implied. I knew it was British Thermal Unit....but not the "one pound of water raised by 1 degree F over 1 hour" its almost orgasmic the learning still going on...well ok I am getting a bit carried away.
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08-09-2010, 04:39 AM #9
Re: Tonnage to KW
Kindergarten time, cheeez!
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09-09-2010, 05:23 PM #10
Re: Tonnage to KW
tu Maybe for someone who know's the answer, We only know what we've been taught/self taught when we reach a problem surley it's better to find a solution than sit on it and not know the answer, I'm sure the first time you had to convert something ie pressures/temperatures you got this formula from somewhere or maybe you were born knowing I know i wasn't.
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10-09-2010, 06:40 AM #11
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13-09-2010, 09:27 PM #12
Re: Tonnage to KW
one ton of air conditioning = 12000 btu/hour
3,412 btu/hour = 1 kW
therefore kW = 12000/3413 tons
= 3.517 tons
or kW = tons x btuh/ton x kW/btuh
note that the units cancel, leaving kW
95 tons x 3.517 = 334 kW as noted by Chemi-Cool back in JuneLast edited by dougheret0; 13-09-2010 at 09:32 PM. Reason: small error
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14-09-2010, 03:19 AM #13
Re: Tonnage to KW
Hi James.
No what ever intended, I trained back in the 60's with transition from imperial to SI metric. I bought a book as a reference guide. This is when slide rules were common, before calculators let alone computers.
Everything now is available on the net.
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