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#1
08-31-2007, 02:53 AM
 Unregistered Guest Posts: n/a
Tons of Refrigeration (TR) calculation

i would like to cool the 325 Ncum/sec air from 28 Deg C to 10 Deg C. kindly let me know how to calculate the equivalent TR required to cool the air.

thanks,

#2
08-26-2008, 03:53 AM
 clubwala Guest Posts: n/a
Re: Tons of Refrigeration (TR) calculation

1 TR = 12000 btu/hr
#3
08-27-2008, 04:45 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,536 Rep Power: 19
Re: Tons of Refrigeration (TR) calculation

Quote:
 Originally Posted by Unregistered i would like to cool the 325 Ncum/sec air from 28 Deg C to 10 Deg C. kindly let me know how to calculate the equivalent TR required to cool the air. thanks, jagadish
You need to know the moisture content of the air for two reasons before you can make much of a start.

*Water vapor is lighter than the other components of air and affects both the density and specific heat. You need to determine density to convert volume of air to mass, then multiply by the temperature difference and specific heat.

*The bigger issue is that air can only hold a limited amount of water vapor, and that limit is a strong function of temperature. Over your temperature range you are likely to exceed the limit at the lower temperature range. Condensing water vapor releases considerable heat (heat of vaporization, in reverse) and will raise cooling requirements.

Once you pin down those issues you can calculate heat removed from the air, but there will also be heat gain from the walls of the device which will lower efficiency.

You are looking at quite a high capacity system, and should review your needs with a refrigeration engineer. Even with added information, I doubt the rough answers we could give will be satisfactory.
#4
09-19-2009, 11:12 PM
 nilesh Guest Posts: n/a
Re: Tons of Refrigeration (TR) calculation

i would like to cool the 325 Ncum/sec air from 28 Deg C to 10 Deg C. kindly let me know how to calculate the equivalent TR required to cool the air.

thanks,

#5
06-24-2010, 08:48 AM
 Unregistered Guest Posts: n/a
Re: Tons of Refrigeration (TR) calculation

Hi,
Have a nice day!
I would like to know if i have a 50 square meter room area, then i would like to cool my products from 50 degree celcius to 10 degree celcius.
#6
06-30-2010, 12:07 AM
 Unregistered Guest Posts: n/a
Re: Tons of Refrigeration (TR) calculation

Hi
Have a nice day!
I would like to know if i have a 50 square meter room area, then i would like to cool my products from 50 degree celcius to 10 degree celcius.[/QUOTE]
#7
06-30-2010, 10:52 AM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,434 Rep Power: 12
Re: Tons of Refrigeration (TR) calculation

Quote:
 Originally Posted by Unregistered Hi Have a nice day! I would like to know if i have a 50 square meter room area, then i would like to cool my products from 50 degree celcius to 10 degree celcius.
[/QUOTE]

This is not really a question, Please can you tell us what you are wanting to know?, also, is it your lounge or a refrigerated room, for starters? What part of the world are you in, Africa or Iceland? Is it for short or long term storage etc?
#8
07-16-2010, 07:33 AM
 sampath Guest Posts: n/a
Re: Tons of Refrigeration (TR) calculation

[QUOTE=Unregistered;35511]i would like to cool the 325 Ncum/sec air from 28 Deg C to 10 Deg C. kindly let me know how to calculate the equivalent TR required to cool the air.

thanks,

#9
04-20-2011, 03:10 AM
 stephen Guest Posts: n/a
Re: Tons of Refrigeration (TR) calculation

wath is the difference between trh and tonnage
#10
06-30-2012, 02:34 AM
 Unregistered Guest Posts: n/a
Re: Tons of Refrigeration (TR) calculation

tr=flow*difference of tem/3.024

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