HomeRoast Digest


Topic: New roasting adventure (7 msgs / 303 lines)
1) From: PecanJim
With retirement I will free up some money and I am setting some asside for
spur of the moment ideas and I am looking at throwing some of it at this
LP gas powered popcorn popper as a possible coffee roaster.
   http://cudakitchen.com/catalog-product.php?p_ref05I believe it will require a little modification but I think it can be made
to roast well more than a pound of coffee at a time.  What I like about it
is that it  possible to put thermal probes down into direct contact with
the coffee, the air around the coffee, and on the metal conduycting heat
to the beans during the entire roasting process. Also, I think I can had a
hot air source by connect a heat gun in some way or other.  With all this,
 the possibility of controlling profiles becomes almost unlimited and
quite precise.   Finally, it makes dumping to a cooling tray quite easy.
    Anyway, let me know what you think.
    Pecan Jim - up in South Dakota for daughter's and son-in-law's
graduations from law school this week.  An act that also frees more
money after this summer they will be financially independent.

2) From: raymanowen
I sure don't mean to try to rain on your parade, Jim, but the machine looks
much better suited to popcorn or kettle corn popping duties. It's actually
made to transfer heat to the popcorn oil, then to the popcorn kernels.
Just as air poppers generally run hot for roasting duty, I suspect this
popping kettle might make less of a roasting drum than you would want.
Honestly, why should you have to reinvent the roasting drum on your nickel?
The RK Drum is purpose-built to mediate between LP gas flames and green
coffee.
The big popper may tend to heat up the whole outdoors in getting a batch of
coffee roasted. This heating the whole outdoors is exactly what I'm trying
to design around in my RK Drum setup. I think the jury is out on this one.
The idea of a gas fired clothes dryer occurred to me for a 10k roaster.
Nothing in the dryer is constructed to withstand roasting temperatures, so I
can't afford to resurrect the Edsel roaster design.
A closer appliance misapplication using heat recirculation might be a
natural gas fired dedicated oven. They have nice, big doors, and convection
and heat recirculation could be provided by a strategically located spinning
shaft carrying fan blades or tangential squirrel cage blower impellers.
Cheers -RayO, aka Opa!
"The indisputable truth is that no coffee is fresh if it isn't fresh
roasted." - - Martin Diedrich
On 5/9/07, PecanJim  wrote:
<Snip>

3) From: miKe mcKoffee
So what if it runs hot ON FULL POWER, which it may or may not. As Jim said
will require a little modification, which could (and should in my mind)
include adjustable gas if it doesn't have it already. One big plus also
already mentioned by Jim using this gas popcorn popper over RK Drum, "easy
dump" for cooling. Additionally mentioned easy temp monitoring multiple
places.
 
Seems to be similar to a stove top popcorn popcorn, which by all accounts
works for roasting coffee, 'cept on steriods:-) How well the stock stirring
will work who knows, possible other area of modification. Might add some air
flow for convection. Then there's chaff collection. But seems a worthy
project to me.
Pacific Northwest Gathering Vhttp://home.comcast.net/~mckona/PNWGV.htmKona Kurmudgeon miKe mcKoffee
URL to Rosto mods, FrankenFormer, some recipes etc:http://mdmint.home.comcast.net/coffee/Rosto_mod.htmUltimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
Sweet Maria's List - Searchable Archiveshttp://themeyers.org/HomeRoast/	From: homeroast-admin
[mailto:homeroast-admin] On Behalf Of
raymanowen
	Sent: Wednesday, May 09, 2007 10:24 PM
	
	I sure don't mean to try to rain on your parade, Jim, but the
machine looks much better suited to popcorn or kettle corn popping duties.
It's actually made to transfer heat to the popcorn oil, then to the popcorn
kernels. 
	
	Just as air poppers generally run hot for roasting duty, I suspect
this popping kettle might make less of a roasting drum than you would want.
	
	Honestly, why should you have to reinvent the roasting drum on your
nickel? The RK Drum is purpose-built to mediate between LP gas flames and
green coffee. 
	
	The big popper may tend to heat up the whole outdoors in getting a
batch of coffee roasted. This heating the whole outdoors is exactly what I'm
trying to design around in my RK Drum setup. I think the jury is out on this
one. 
	
	The idea of a gas fired clothes dryer occurred to me for a 10k
roaster. Nothing in the dryer is constructed to withstand roasting
temperatures, so I can't afford to resurrect the Edsel roaster design.
	
	A closer appliance misapplication using heat recirculation might be
a natural gas fired dedicated oven. They have nice, big doors, and
convection and heat recirculation could be provided by a strategically
located spinning shaft carrying fan blades or tangential squirrel cage
blower impellers. 
	
	Cheers -RayO, aka Opa!
	
	"The indisputable truth is that no coffee is fresh if it isn't fresh
roasted." - - Martin Diedrich
	
	On 5/9/07, PecanJim  wrote: 
		With retirement I will free up some money and I am setting
some asside for 
		spur of the moment ideas and I am looking at throwing some
of it at this
		LP gas powered popcorn popper as a possible coffee roaster.
		
		    http://cudakitchen.com/catalog-product.php?p_ref05 
		
		I believe it will require a little modification but I think
it can be made
		to roast well more than a pound of coffee at a time.  What I
like about it
		is that it  possible to put thermal probes down into direct
contact with 
		the coffee, the air around the coffee, and on the metal
conduycting heat
		to the beans during the entire roasting process. Also, I
think I can had a
		hot air source by connect a heat gun in some way or other.
With all this, 
		the possibility of controlling profiles becomes almost
unlimited and
		quite precise.   Finally, it makes dumping to a cooling tray
quite easy.
		    Anyway, let me know what you think.
		
		    Pecan Jim - up in South Dakota for daughter's and
son-in-law's 
		graduations from law school this week.  An act that also
frees more
		money after this summer they will be financially
independent.

4) From: Tom Ulmer
Jim-
I think for near the same dollars that you could design and fabricate
something much more aligned with your thoughts. Surely there is a metal
fabricator near that you could befriend and discuss your ideas with.

5) From: John Moody
Good for you Jim, enjoy your retirement!!
I would guess that the stirrer is way too slow on that thing, and it seems
expensive for what it is.
Inspired by your methods, I did a single roast using a large wok over a
propane ring burner, Kings Kooker Portable Burner #200.
That burner has a very large number of orifices, and makes for an even
distributed flame, I did not feet the need to use a diffuser.  It has an
igniter that is operated by the control valve; very nice and responsive.
I imagine your could use one of those burners with a wok, and mount a
stirring motor underneath out of the heat.  The entire contraption could be
put on a dump pivot.  All thermal probes, auxiliary heat guns etc. could be
permanently fixed as well.  You could have all you like about the wok/hg
method, but greatly reduce your exposure to the smoke particles
John

6) From: raymanowen
"Puts out an impressive 20,000 BTU's. " [Impress me more]
Starting $9
+ Crating
+ Shipping
Then start modifying. I agree, the dump capability is a big point - - into
what?
Popcorn is better hot and not normally cooled before buttered and salted.
I agree, seek out a metal fab for discussions and a reality check.
As supplied, this popper is suited to heat an oil bath to popping
temperatures.
Even with the wimpy burner, the dry load could allow the popping vat to
overheat because of inefficient heat transfer to the beans.
For $4 big + crating and shipping, you might enjoy a machine that will let
you expand your coffee roasting craft rather than your vocabulary that has
to be written in Italics!
Cheers -RayO, aka Opa!
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976

7) From: Edward Bourgeois
Jim   seems as much that you are looking for in a roaster are similar to
what I have been working on. Good bean mass temp monitoring, dumping for
cooling, temp controls, etc. I will attempt to put a pic on here or email me
at edbourgeois and I will send you one. This is my first model and
my model II is almost finished Ed


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