commercial cold storage

[ARA]

how would one estimate the REQUIRED cooling capacity in watts of a 20000 square feet cold storage with outside temperature at plus 104 Fahrenheit and inside to be maintained at minus 32 Fahrenheit?

is there a simple rule of thumb or there is some elaborate formula? :confused:

[nike123]

That is easy, but what with stored goods? Materials, trafic of goods outdoor conditions etc....
http://www.refrigeration-engineer.com/forums/showthread.php?t=17121

Please, post question with more data to correct section, because this has nothing to do with "Do you need help with using this message board?"

[ARA]

how would one estimate the REQUIRED cooling capacity in watts of a 20000 square feet cold storage with outside temperature at plus 104 Fahrenheit and inside to be maintained at minus 32 Fahrenheit?

is there a simple rule of thumb or there is some elaborate formula? :confused:
thanks for taking your time and replying to my question, the frozen meat items are going to arrive already frozen, in reefer trucks, and the size of the cold storage is 75 feet by 60 feet by 12 feet, the outside temperature being 104 degrees F, and inside we want to have minus 32 degrees F, there is only one sliding door to warehouse, which is going to open/close at least 6 times every hour for 8 hours during the day.
The walls/ceiling of the warehouse are from PUF panels, 6 inches thick.

[US Iceman]

...inside we want to have minus 32 degrees F...


That seems very cold for meat already frozen! Usually frozen meat or ice cream, etc would be stored around -15°F or so. Some of the Japanese fish is stored at -40° or a little colder, but I am not aware of anything else that requires the cold temperatures you stated.

Can you provide details on why this is needed?

Ideally, the cooling load should be calculated to ensure adequate capacity is provided. However, there are some rules-of-thumb that could be used for conversational discussions only.

[Brian_UK]

Is it just a rule of thumb that you need? Are you the project manager in charge of a new installation or is it an upgrade of some existing plant?

Ideally you should include a refrigeration expert in your deliberations.