30854Re: Looking for a boiler
- Aug 2 5:39 PM--- In email@example.com, "rehpotsirhcj"
> Couple more quick questions...
> I finished the head today and began to look toward the recirc system.
> I was thinking that I could freeze water in 5 or six milk jugs, place
> them in a cooler, fill the remainder of the cooler with water, and then
> use a submersible pump to circulate water through both the condenser
> and the Liebig. I wonder if this would be sufficient? I'm not sure how
> long I can expect a run to last, or how quickly I would loose my ice
> to the returning warmer water. I tried the setup with an aquarium pump
> today (because I already had a few) but it doesn't have enough umph to
> move water to the top of the head from ground level. I'll use the
> bildge pump as suggested. But it will have to wait until next week. I
> think my wife may kill me when she finds out how much I've paid for
> copper this weekend. :)
> misc. questions:
> how large diameter copper tube would you suggest for the reflux return?
> What have you guys used to seal the thermometer at the top of the
> column that wont compromise the product (I assume not rubber)? Seems
> like soldering in a probe would destroy the thermometer.
> Thanks much,
I feel ya on the Price of Copper. I just picked up a 48 inch piece of
1.5". 40 bucks. Hopefully the xtra 18" will get me to the 95% level.
My other reason was that my pieced together column has a couple of
solder gobs in it that prevented me from using scrubbers or structured
packing. Still gonna try it with marbles first though.
On your frozen jug idea. I think a lot of the guys that use recirc
systems might employ this method or similar. It makes more sense to
me however to use then 1 at a time. In my mind I think they would
last longer. Keep an eye on the coolant temp. When it hits 100F or
so change to a fresh jug. I have seen some illustrations in some
books that run the water over a wash board that has a fan blowing on
it. The idea I think being to spread the water out over a wide
surface area to help cool it. I even saw a pic the other day where
they were running the cooling through a radiator with a fan blowing
over it. Again spreading the coolant out over a broad surface area.
In a recent thread a guy had a set up that when the water was returned
it went over a sheet the turned it into rain drops that again were fan
cooled. Just throwing out some ideas. A Reflux Run for pure or close
to pure etho will go at about 600ml-1L per hour. Plus an hour or so
with the valve fully closed to equalize the column. A typical run of
3 gallons of low wines for me goes about 12 hours.
As far as sealing the thermometer. I used a rubber bung from the brew
shop for a long time. The one in the top of my boiler lid is simple a
.150" hole that the digital thermometer slip through and I seal it
with the ever fool proof flour and water mixture. (called luting)
The rubber bung worked great for me. I bought on with a hole in it
and then screwed a compression fitting into it and again used flour
and water or sometimes teflon tape. Never had a leak.
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