Re: Counter-flow in condensor coil
>You kinda lost me on the parallel / serial stuff. Sorry. Can't quiteDid I actually use the word serial? I can't seem to find it in my post. I
>conceive of vapour working like that.
thought I used the terms parallel-flow and counter-flow, meaning (for want
of anything better) when the coolant flows in the same [overall] direction
as, and the opposite direction to the vapour, respectively. I'll give you
an Old English translation as soon as I can figure it out, Beowulf.
Speaking of which, I'm sure you've already done this, but you must be sure
to impress upon your betrothed that the word "honeymoon" refers to the
practice of getting merry on [honey] mead following the big day, which
might make her look more favourably upon your distilling efforts.
>The condenser's output was so hot that my poor old lemon tree had nothingThis is the interesting part. As Steve suggests, maybe it's because in your
>about it for weeks after. There was a lot of inefficiently transferred heat
>rolling out via the condenser water straight onto its roots. Poor thing.
current configuration the condensate is dripping off the coil at a higher
temp, whereas previously the coolant was carrying more heat away.
>we could use this principal in the design of future condensers byI have done just this. When I was obsessing on the design of my still head
>providing a way for the freshly condensed liquid to get of the coils
>as quickly as possibe.
I didn't like the idea of liquid spiralling down the coils, getting hotter
and insulating the vapour from the copper surface, so for this and other
reasons I tilted the head at a 45 deg. angle. This forces the liquid to
drip off each winding of the coil.
Mine would be a good test case, then, to see if this factor is what is
causing the difference in performance reported by some. If your theory is
right Steve, my setup should be comparatively unaffected by changes in
coolant direction flow. I have my coolant flowing from the top down, but I
do get very hot alcohol output (this is a problem actually when doing
de-refluxed pseudo-potstill runs as the outlet ejects vapour). Nor do I
seem to use that much coolant, even at the 2500 watts I often distill at.
I'm doing a stripping run as I write, running with 2000 watts electricity
plus roughly 500 watts worth of gas boosting. My coolant is around 15
celsius going in, a weed-killing 66 out, and I'm using 440 mls/min or so. I
have heaps of cooling capacity in reserve with 10 inches of wound 1/4 in.
tube. So does this defy what Mike says below or is it because of my unique
>A 50 mm diameter coil 200 ml long will cool 1500 Watts in the firstThis is an excellent discussion.
>50mm of its length when fed from the bottom with about 350 ml/min
>cooling water (depending on inlet temperature of course).
>That same coil will allow vapor to escape at almost any achievable
>coolant flow rate if fed from the top.
- Dr. Cones method in "The Compleat Distiller" spells it out pretty
clearly. If you don't have a copy of that. Here is another good info
--- In Distillers@yahoogroups.com, "Murphy-Marsh, Leigh"
> General question to everyone out there, when I forget to buy a pack of
> turbo and just use champagne yeast I have lying around (for my mead) and
> some DAP I generally have a fairly good fermentation. Maybe not as quick
> or vigourous as Turbo packs but pretty good. My question is why do
> people use all sorts of varied stuff like Vegemite and tomato paste? If
> it works better I'd like to know because I'll start tampering as well.
> Doesn't DAP have everything a good growing yeast laddie needs?