Sizing a Cold Room - Refrigeration Capacity

Cold room suppliers are able to do this sort of thing, and the best thing to do is to contact them direct with this specification.

That is a sad answer...if people always answered to go and see the specialist, this forum would not exist !!

We both know the answer is a few formulas...not discouraging people from sharing knowledge.

As I don't know the answer Albert, you'll have to wait for someone who knows it to pick this one up.

Good luck!

You will need to do a simple shell heat loss calculation for conductive heat loss or gain through floor, walls, doors, ceilings etc. Through this, you can determine potential cost / benefit of upgrading insulation. (i.e. cost of insulation vs cost of refrig equip + operating cost based on degree hours)

Then you need to make some assumptions in infiltration heat gain (leaks in the assembly, air coming in when someone opens the door, heat coming off of the fruits and vegetables etc.)

There will be latent and sensible cooling loads. You'll need to take each of those into account. This could be more or less relevant depending on the relative humidity of the ambient air where you are. Make sure to provide a condensate drain somehow.

Once you have a design heat loss, you will know how to size the equipment in terms of Btu/h or the metric equivalent other measure.

You can figure out annual operating costs using a version of a "heating degree hour" energy use calculation.

Not any actual equations here, but you should be able to easily find the equations and do the math with the process I've described.