really cold conditions

[MikeHolm]

I have a situation where is -50C on the fridge side and I need to transfer the heat/cool to a fan coil but I cannot use glycol as it turns to jello. What is used at these temps for a heat transfer fluid?

[Magoo]

Hi Mike.
I believe a product called temper goes down to -55' C and stays fluid.

[MikeHolm]

Thanks Magoo, Found it but not found a supplier in Canada. Europe so far.

[al]

Would Dowtherm or siltherm work at -50?

[passandscore]

You may find this helpful.

[MikeHolm]

Yes, thanks...

[Magoo]

Hi Mike
if a small system volume, consider pure alcohol. The non drinkable stuff, highly volatile though.

[northernbeach]

Thanks for sharing it.

[MikeHolm]

We used 55% Dowtherm. works a treat

[mbc]

Kerosene ( with out any wax ) is a good for this kind of jobs.
it is more safe than alcohol.

[sterl]

Delimone. Its somewhat corrosive and it likes mineral oil; not flammable and very low viscosity even at these temps.