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SS vs Copper Immersion Chiller

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srnoel:
I've researched a bit and it looks like Copper works better for immersion chillers.  But my question is how much better?  Is it a huge difference?  SS is easier to clean and a bit more durable and I can find a SS chiller for 40$ (new).  Any suggestions would be great.

Debate away!

Thirsty_Monk:
Copper has better heat transfer rate and is easier to work with.
I do not have any problem cleaning copper IC.

euge:

--- Quote from: Thirsty_Monk on February 28, 2011, 09:45:43 PM ---Copper has better heat transfer rate and is easier to work with.
I do not have any problem cleaning copper IC.


--- End quote ---

+1 Never had a single problem with copper- except I think it's wise to solder on hose-fittings instead of using hose-clamps. Like this:



If you are going to bend it up yourself make sure you take into consideration the wort depth you'll typically have.

hopfenundmalz:
Copper has a much much better heat transfer coeffidicnt than SS.  However, the way it works it that the highest resistance to the heat flow is in the liquid metal interface for both the water and wort side.  If you go through the equations you find that the SS is about 87-88% as effective as the copper, even though the heat transfer coeffecient is so much less.

I have copper, as I built my own from a 50 ft 1/2 coil of copper tubing that was about $50 at Lowes, and then add the end fittings an you are over $60.  Surface area is a big part of the equation, as that is where the heat flows.  If the SS is a 1/2 inch 50 foot design for $40, it would not be a bad way to go..

Pi:
Where can you find 50' of stainless tubing for 40 bucks? Grainger has 316 welded stainless 1/2" OD; .2" wall thickness for $128. I use a copper 3/8" counterflow pushing it with a March pump. I guess I could build a stainless one and would still be cheaper then Blichman's Therminator. Anyone worked with SS tubing? is it much harder to bend?

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