sandwich panel

[afak]

Hi to every one

I need some speculations on the expected thickness of the PU panels used in cold stores at ambient temp of 45C for at storage temps of :
≥ 5 ℃
≥ -5 ℃
≥ -25 ℃
≥ -45 ℃
Thank you

[Peter_1]

http://www.isobar.be/productinfobestand/plafondophanging.pdf
Horizontal ambient en vertical the room temperature.

[afak]

Thank You Peter 1
Are number after D in cm ? The file is not in English .

[Peter_1]

Indeed, 8, 10...cm and temperatures in °C.
Forgot to say this.
And the language is Dutch, sorry haven't anyhing better and that's also the one I'm using.
It gives you anyhow at least an idea.

[afak]

Thank You Peter 1.
Highly apreciate your Help

[smpsmp45]

Hi to every one

I need some speculations on the expected thickness of the PU panels used in cold stores at ambient temp of 45C for at storage temps of :
≥ 5 ℃
≥ -5 ℃
≥ -25 ℃
≥ -45 ℃
Thank you

we use

60mm, 80mm, 125mm & 150mm thick PUF panels typically for such temperatures.

Infact Asharae gives a specific formula for considering the thicknesses & these values are just matching that formula

[Peter_1]

What's that formula then?

[smpsmp45]

I am scanning that out & shall try & post it on the forum site

[suny]

Thank you smpsmp45 for your info. Pls post it at your earliest.

Hi! afak, You can find more info from the mfg of sandwitch panel in China. www.bingshaninternational.com/main_e.htm (http://www.bingshaninternational.com/main_e.htm)

Suny

[smpsmp45]

That scanned copy is almost invisible. I have prepared that in PDF format. Ashrae recommends R values for Insulation. One can easily derive the Insulation Thickness based on the Thermal Conductivity of the insulation material.

[old gas bottle]

dont forget other factors as in fire ratings,thickness needed to span wall panels or top hat sections,exposure to sunlight,to name a few,as a rough guide,100mm for chillers, 150mm,freezers,200mm for any lower,thats using polyurathane or P.I.R. not rockwool or polystyrene.:D

[afak]

Are these thicknesses used to the roof,walls,ground equally?

[old gas bottle]

only on small rooms that are self supporting,meaning something like a 3mtr cube ,but when you start going above that the panels need to be thicker to add strength,after 6/7 mtr you need to be looking at top hat sections suspended from the roof steelwork by threaded rods.sizes only as a guide.;)