Can i use 80mm panel thickness on the ceiling of the freezer?

[taraki]

Hi All,

Can you guys help me. I have a customer in Kuwait which want to convert their chiller room into freezer. The thing is the ceiling of this room is only 80mm polyurethane walls and floorings are all 100mm PU, he want to run this into freezer temp of -18 deg C. Is there a possiblity that there will be a condensation on the ceiling if i run this as a freezer? Is someone here tried already this one and what is the result? The room is located on the loading area of the store and temp is reaching at approximate 35 deg C.

Thanks for your help in advance

[cadwaladr]

I would say no,can you not put 100 mm on top of the 80mm panels you did not say how large this room is.

[taraki]

the room size is 7m x 4.9m x 2.7mH and i will run it at -18 deg C with a Bitzer 15 hp. I will not put 100mm on top of this 80 mm. My only question is if there will be a moisture/condensation on the top of this 80mm ceiling?

Thank you for your reply.

[cadwaladr]

I think there will be,you cannot have too much insulation replace the ceiling that's my advice.

[hookster]

80mm ceiling looks ok at 35 with an RH 80/90%. You want to avoid a skin temperature of 18 or less to avoid dew point of external surface.

I would also consider - floor has it been constructed for low temp slab. Fit door frame heaters. Door opening times and door seals. Fit vacuum release valve to store.

[taraki]

Thank you for the advise.. I will try not to change this and will feedback here if it's ok or not.