Re: Winding tight radius copper cooling coil
- Hi Alex,
I've got to ask why do you want a triple coil? And do you realise that by
doing that for the whole coil you will decrease the efficiency as you will
not have counter current exchange occurring with the warm vapour/cold water
going in opposite directions?
Myself, I have a very large condenser coil, and also an smaller internal
coil for just the top 100mm. In hindsight, even this is too much - only the
bottom 100mm or so of my large coil gets used, and only the bottom coil of
the inner coil gets used... and that's using QLD water which was 27 degrees
C last run! You don't need the big monster you describe.
But, as Tony said - if you are doing it for fun, don't let us stop you!
You can see the photos of my big monster on Tony's site:
Scroll down to MATTS STILL, and then to the condenser section...
>As I said I modified my reflux design somewhat. It should make it
>simpler to build. Being a perfectionist, I thought that more cooling
>is more efficient run and therefore more purity and volume of the
>output. So, I want to fit inside 3" condenser shell my triple
>concentric winded coil maid out of quarter inch outside diameter
>copper tubing. I want to make a straight run down and then start
>winding the most inner core around this vertical. As I approach the
>top I will insert the smaller coil in the appropriate size tube and
>keep winding down to the original start of the coil. Then I repeat
>again and should have nice triple condenser coil. I have no problems
>with outer two coils. It is the first vertical run down and then the
>inner coil with the pipe which has outside diameter of 0.85" that
>worries me. Now I heard that heating with torch helps. I wonder if
>anyone can give me a directive how to accomplish this. Any help is