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30-03-2009, 05:25 PM #1
Help using coolpack for cold room
Hi I have a room being stored in a supermarket that is 3 x 2.5 x 2 and it will be storing meats. The ambient store temp is 20c. How can I utilise coolpack to make this calculation. I also would like to know what Tcool(h) means. Any help would be useful, this is for a college work and I just want to know if I using this program correctly. Thanks.
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30-03-2009, 06:20 PM #2
Re: Help using coolpack for cold room
Have you tried the HELP files of Coolpack?
Brian - Newton Abbot, Devon, UK
Retired March 2015
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30-03-2009, 06:24 PM #3
Re: Help using coolpack for cold room
They don't tell you anything. I may have to do this manually.
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30-03-2009, 07:01 PM #4
Re: Help using coolpack for cold room
Tcool [h] means the time for the cool down of the warm products loaded into the cool room. "T" says it is time, "[h]" says the time is in hours.
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30-03-2009, 07:13 PM #5
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31-03-2009, 10:14 AM #6
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Re: Help using coolpack for cold room
This is from Help:Printing _Description of model_.pdf
I think that description is good enough for average person.Last edited by nike123; 31-03-2009 at 10:18 AM.
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31-03-2009, 02:05 PM #7
Re: Help using coolpack for cold room
Sorry to be a pain, but does that mean if I wanted to cool meat down to -18 from 15c would I change the Tcool to 1 hour. Is that normal industry standard.
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31-03-2009, 02:20 PM #8
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Re: Help using coolpack for cold room
Yes, that mean that, and not, that is not industry standard.
For illustration purpose:
http://www.meatupdate.csiro.au/data/Meat_93_24.pdfLast edited by nike123; 31-03-2009 at 02:25 PM.
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31-03-2009, 02:25 PM #9
Re: Help using coolpack for cold room
I doubt 1 hour is industry standard.
The actual cooling/freezing time is highly dependent of the air flow, the size of the meat pieces and whether it is packed or hanging free.
If it is not a fast cooling/freezing room I would have set the Tcool to 24 hours and the set the quantity of products to load every day some 20 to 30 percent higher than the real quantity loaded into the room every day. Or alternatively set the real quantity and set a Tcool of 15 to 18 hours. This would give a reasonable spare capasity for defrosting.
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01-04-2009, 02:06 PM #10
Re: Help using coolpack for cold room
Ok after using cool pack I came up with these answers.
(uncooked meat)
Room size = 3 x 2.5 x 2
Troom = 0c
Rh = 85%
Ambient = 23c
Rh = 65%
Acf = 9
goods = 1000g
Tin(c) = 17
tcool = 15
Persons = 1
Work type = heavy
Lights 100w/m2
Now it says I need a maximum of 7.8 kw for the room stated.
All I would like to know is 7.8kw enough for this space?
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01-04-2009, 02:17 PM #11
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01-04-2009, 02:27 PM #12
Re: Help using coolpack for cold room
Excellent I will add that calculation to my work and hopefully get a pass mark.
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01-04-2009, 03:33 PM #13
Re: Help using coolpack for cold room
What did you get as an average capasity requirement?
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01-04-2009, 06:11 PM #14
Re: Help using coolpack for cold room
I think it was around 3.7 kw.
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01-04-2009, 06:21 PM #15
Re: Help using coolpack for cold room
I would have used the average capasity requirement as this gives a reasonable spare capasity.
The max capasity is the capasity needed to avoid the cool room temp increasing temporarily if the daily meat is put into the room all at once. This capasity requirement is also subjected to a number of aproximations in the coolpack program. A somewhat different number can be as correct as the coolpack number.Last edited by SteinarN; 01-04-2009 at 07:09 PM.
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01-04-2009, 06:26 PM #16
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01-04-2009, 06:54 PM #17
Re: Help using coolpack for cold room
When I think about it if I have to size and select refrigeration plant for this. So working of the maximum capacity is probably the best option. For example if I size it at 3.6 kw and the temp does rises unexpected, the system will not be able to cope with the extra demand. If you catch my drift.
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