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Old 11-22-2011, 12:11 PM   #31
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The thing that the naysayers are forgetting is that a ss coil works just fine in a herms system, this is just the opposite. These chillers will last a lifetime and stay looking like the day they were new.

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Old 12-28-2011, 02:29 AM   #32
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Well, this thread convinced me to go with SS for my immersion chiller. I got a 3/8" X 50' chiller. I'm stoked for it.

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Old 12-28-2011, 03:03 AM   #33
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I have SS and had no problems, works like a charm, easy to clean, durable.

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Old 12-28-2011, 02:37 PM   #34
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I have a SS chiller simply because I didn't want to deal with any oxidation in the future. I had used copper callers before but never liked how they would oxidize over time. For a 5 gallon batch, the time to chill is small.

I use an inlet hose of about 6 ft and wrap that into a coil in the sink filled with Ice water then into the chiller. With that setup, I am able to get wort down to pitching temp of 68 deg in about 18-20 minutes. With stirring, i get It down just a few minutes faster. Without the Ice bath, its about 25-28 minutes.

Overall both work great, with copper being a slight bit faster, but for me, cleanliness was important.

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Old 01-07-2014, 05:01 AM   #35
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I just got a stainless steel immersion chiller for Christmas. I was wondering about one thing. I had the idea of bending the coils to make an overlapping/alternating pattern to spread out the coils.

First off, can anybody tell me if this actually has an impact on the chilling ability of the IC? Secondly, if I go for this, do I have to worry that the coils will crack/break as I try to bend them?

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Old 01-07-2014, 07:39 PM   #36
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Quote:
Originally Posted by b33rm3 View Post
It all boils down to the thermal conductivity coefficient 'k'

k for stainless steel 16 W/m*k

k for Copper 401 W/m*k

http://www.engineeringtoolbox.com/th...ity-d_429.html

copper is roughly 25 times more thermally conductive. Meaning that one would have to use about 25 times more stainless than copper to get the same effect.

And in regards to oxidation stainless steel is stainless due to a layer of chromium oxide on the outside. Copper on the other had takes quite some time to oxidize and due to the acidic nature of wort any oxidation that may have formed will be cleaned off.

While this is a valid point you have to understand that the thermal conductivity of the metal here is not the issue, the greatest limiting factor is your transfer coefficient on the wort side. Since it is an immersion chiller IF there is no agitation your transfer properties won't be so great on the wort side, internally since most folks have water flowing rapidly the transfer coefficient against the internal wall of the chiller will be pretty high. Also remember that the thermal conductivity can be looked at in therms of the thickness of the material, with the dimensions we are working with here the resistance posed by the metals is damn near negligible.

Unless you make your immersion chiller out of glass you need not worry.
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Old 01-07-2014, 08:53 PM   #37
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I've had my eye on a stainless CFC from William's for a while. I like the idea of being able to run almost anything through the thing to clean it.

http://www.williamsbrewing.com/STAIN...LER-P3452.aspx

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Old 01-08-2014, 02:22 AM   #38
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I should've made it clear I was resurrecting an old thread.

Anybody have ideas for me on how the stainless steel holds up to bending the coils to a staggered position or whether that will even be helpful anyway?

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Old 01-08-2014, 11:42 AM   #39
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Be smooth about it and don't kink it. A little bit of stagger will theoretically help you because when you place the coil down all that surface area is no longer just contacting the next coil up, you are generating more exposed surfaces for wort (in terms of convection).

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