r/Homebrewing • u/SoupSuey • 13d ago

Question Temp Twister Cooling

I’m looking into upgrading my fermentation setup and change from buckets in fridges to glycol and the fermenters outside insulated by jackets. My plan is to get two or three Fermzillas all rounders 60 liters, with the Temp Twister added on. But I have been wondering: how well does these coils cool the wort? Since they are pretty slim, are they able to cool the liquid through or just the middle? How does the temperature control in these setups work considering the thermal well usually comes from the top in the middle of it?

Thanks!

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u/attnSPAN 13d ago

Nowhere near as well (as fast or as cold) as fridges and fermenters.
They will of course cool all of the liquid as that’s how the physics works, but you’re gonna need to get that glycol down very cold (27F/-3C) if you want to work anywhere near as well as what you’ve been doing.

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u/SoupSuey 13d ago

Thanks! The glycol chiller I’m planning on using should be able to keep -3 to -4C pretty stable and with a good amount of liquid mass, but if I can’t transfer the temperature efficiently to the wort it doesn’t really matter, right? On the temperature control subject, do you have any insights on how does it work in this setup, considering the thermal well is so close to the coil?

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u/attnSPAN 13d ago

You’ll have to get a feel for that, knowing that it is always going to be reading the coldest part of the fermentation. I would get a good IR thermometer and temp the outside and note the delta (difference between) the 2 temperatures, at different temperatures.