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Thread: refrigeration size
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19-11-2007, 12:58 PM #1
refrigeration size
Have a crazy farmer brother in law in arkansas,I live in NJ.I am an hvac contractor. I need help sizing a unit for a 12x20x12 ft room for cold storage. Animals for process, Cattle chickens etc. 33 degrees can get to 100 degrees outside in the summer. shaded in the afternoon. r40 walls and ceiling one 21 square foot door. he is building it now as one room and plans on making it two rooms in the future to make one side a freezer. I will have United refrigeration ship the equipment and I wiil be going to do the install.
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19-11-2007, 02:54 PM #2
Re: refrigeration size
Helo Foleymech
you would need a product load, based on the conditions that your product enters the room and how long you have to acheive your product temp.
Perhaps United will help you
You could download the calculation program that Keeprite refrigeration has off their web site.
Kind Regards AndyLast edited by Andy; 19-11-2007 at 02:56 PM. Reason: bad spelling
If you can't fix it leave it that no one else will:rolleyes:
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20-11-2007, 02:24 AM #3
Re: refrigeration size
Hi, We design and build refrigeration. With no real heat load a guess on the system we would SWAG is probably a 75,000 btu system at +20 suction with a 125,000 btu Codenser @ +20, R-404, Bohn coil with a Bohn condenser. That is a pretty good rough number coming in at room temp and getting to designed temp in 24 hours.
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20-11-2007, 03:25 AM #4
Re: refrigeration size
Thank you for the replies. The animals would be coming in at about 100 degrees the room would already be cold. I would think two people. 3000 lbs of meat. What would a guesstimate wholesale cost of the equipment be. We deal with united refrigeration.
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20-11-2007, 08:53 AM #5
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20-11-2007, 10:51 AM #6
Re: refrigeration size
to many questions need yet to be answered..... Occupancy, air changes, actual construction, misc load. i always tend to refer to DOSSET
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20-11-2007, 01:51 PM #7
Re: refrigeration size
Forget all the other loads besides the products that will be entered in the room.
Take at least 7 kW cooling capacity if you want to cool it in 8 hours, working with a DT of 7K to maintain 85%RH.
There's a difference between blast cooling the warm meat and preserving the already cooled meat.
A freezer construction is completely different than a cold room construction.It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.
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