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	FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
		Digest Janitor: pbabcock at hbd.org


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Contents:
  immersion chiller idea (Matt)
  Re: Ultrasonic masher? (Dick Adams)
  Aluminum Tubing ("Lance Harbison")


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Date: Mon, 8 Dec 2008 08:23:54 -0800 (PST)
From: Matt <baumssl27 at yahoo.com>
Subject: immersion chiller idea

It's well known that stirring greatly improves the speed at
which an immersion chiller cools wort.  And at least a few
"automatic" stirring methods have been developed to avoid
the necessity to actually stand there and stir:

1. From the distant past, Dr. Pivo's "jump valve" technique
added a check valve and reservoir to the immersion chiller
in some way that created an unstable "jumping" oscillation.

2. "Planispiral" designs in which the copper tubing is left
in a flat, pancake-like configuration, suspended at a shallow
level in the wort.  Cooling near the wort surface is supposed
to create convection currents.

There may be others.  Anyway I was thinking about the second
idea and got to wondering what configuration would really
maximize the convection current.  I suspect the design could
be significantly improved by cooling the wort not just at a
shallow level, but also on only one side of the pot.  As you
look at the pot, the cooling would then be restricted to,
say, the upper right portion of the wort, creating clockwise
convection about your line of sight.  The chiller would need
to be wound in such a way that it doesn't excessively
obstruct this flow--copper tubing wound in an open spiral
about an axis parallel to the expected convection current
axis would probably fit the bill.

Has anyone tried this?  I'm happy with my counterflow chiller
so I probably won't build and test it, but it seems to me
that the difference could be significant for someone who
prefers immersion chilling.

Matt


      


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Date: Mon,  8 Dec 2008 12:14:36 -0500 (EST)
From: rdadams at panix.com (Dick Adams)
Subject: Re: Ultrasonic masher?

> An idle thought on a snowy morning:  Is there any experience
> with the use of ultrasonics - specifically, ultrasonic
> cleaners - to gelatinize adjuncts like unmalted oats or
> corn?  This is presumed to be an alternative to the cereal
> mash.

Alas a new toy.  A great idea for a Christmas present.
I've been slacking off lately on upsetting my childbride.
A price tag of $6,000 should set her off just like when
I showed her the photos of a $7,500 homebrewing system!

Dick


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Date: Mon, 08 Dec 2008 22:08:52 -0500
From: "Lance Harbison" <harbison65 at verizon.net>
Subject: Aluminum Tubing

I am in the process of building a chiller that will deliver glycol to a coil 
that will be immersed in the beer.  In McMaster Carr 3/8" copper tubing is 
$200 for a 50' coil, while aluminum is $50.  I know many use aluminum for 
their pots, but would there be any disadvantage to using it in the fashion 
I'm thinking of?

Lance Harbison
Pittsburgh 




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