[Stoves] Stove ID please - 2-pot stoves - testing needed
Kevin
kchisholm at ca.inter.net
Wed Jan 2 07:50:32 CST 2013
Dear Christa
Thanks very much. The figures displayed easily.
Best wishes,
Kevin
----- Original Message -----
From: CHRISTA ROTH
To: Discussion of biomass cooking stoves
Sent: Wednesday, January 02, 2013 8:38 AM
Subject: Re: [Stoves] Stove ID please - 2-pot stoves - testing needed
check if that works
happy new Year to all, Christa
Am 02.01.2013 um 12:05 schrieb Kevin <kchisholm at ca.inter.net>:
Dear Mark
They are an Image, but in .png format. I can't open that format either!! :-(
Would you be able to re-post them in .jpg format?
Thanks!
Kevin
----- Original Message -----
From: Marc Pare
To: Discussion of biomass cooking stoves
Sent: Wednesday, January 02, 2013 1:45 AM
Subject: Re: [Stoves] Stove ID please - 2-pot stoves - testing needed
In case anyone needs these: I opened the Sketchup files and rendered them as images. They're attached.
You can download Sketchup at http://www.sketchup.com/
It's a free 3D modeling software that is designed to be intuitive to use. It's target audience is architecture drawings, but I've found it nice to bang out schematics for reports as well.
Marc Paré
B.S. Mechanical Engineering
Georgia Institute of Technology | Université de Technologie de Compiègne
my cv, etc. | http://notwandering.com
On Wed, Jan 2, 2013 at 10:20 AM, Richard Stanley <rstanley at legacyfound.org> wrote:
Michael,
Presuming this is yourself speaking, cnet.com goes even further astray.
Oh well, will go to Guatavo for the .skp file direct.
Richard
On Jan 1, 2013, at 8:52 PM, mtrevor wrote:
Like I corrected www.cnet.com
Michael
----- Original Message -----
From: Richard Stanley
To: Discussion of biomass cooking stoves
Sent: Wednesday, January 02, 2013 2:26 PM
Subject: Re: [Stoves] Stove ID please - 2-pot stoves - testing needed
Michael,
Are you sure that this www.cnet.comoc is the right link: I can't open it on my Mac. /Safari server.
Richard
On Jan 1, 2013, at 1:32 PM, mtrevor wrote:
Paul and others if you were having trouble with Gustavo's sketch up images of the 2 pot stove Goolge Sketch up is available for free thru downloads at www.cnet.comoc
Michael
Majuor
----- Original Message -----
From: Paul Anderson
To: Discussion of biomass cooking stoves
Sent: Monday, December 31, 2012 11:26 AM
Subject: Re: [Stoves] Stove ID please - 2-pot stoves - testing needed
Crispin and all,
The Prakti 2-pot unit should be directly compared with the 2-pot unit from Envirofit.
http://www.envirofit.org/products/?sub=cookstoves&pid=5 (to see a photo).
Double-Pot Attachment
Features
a.. The Double pot accessory with chimney is the perfect add-on for customers who want the portability and ease of using the single-pot stove, but need the extra cooking area for large families, festivals, or cooking for visitors.
b.. The attachment is easily moved onto or off of the stove for quick change ability but is steady and sturdy while attached.
c.. The chimney portion can be used as is - to move any minimal emissions out of the face of the person cooking - or can be vented out of the home. * Shown with G-3300 cookstove.
And I am sure that there are other 2-pot stoves, but just not being stamped out and with such smooth edges. Many of us have made such units.
What is needed is some serious study of these useful features, whether built into the stove or as an attachment. Issues to be studied include:
heat transfer to EACH pot
types of pots used (sit on top or inserted)
insulation
temperatures of the outside surfaces
fuel efficiencies attributed to the second pot
And of course, the ways of supplying heat to the 2-pot stove structure. The fact that both the Prakti and Envirofit units use Rocket combustion structures does not exclude use with other combustors, such as
TLUDs and even fossil-fuel burners.
Important note: These 2-pot structures both (virtually all of them?) have a chimney because horizontal flow of the hot gases must eventually have some upward movement to maintain the draft (exceptions if there are fans in use). For the TLUD combustors, the chimney is a nice enhancement of the draft.
I did not understand Crispin's comment about keeping the smoke and flames together.
It seems to me to be worth investigation the % of smoke that can be burned by keeping the smoke and flames together for a while.
That is true for "stick-burners" like the Rockets. But TLUDs are "gas-burners" (that make their own gases in the close-coupled gasifier reactors.) What would be the best ways to get the best results with Rockets, TLUDs, or other heat sources?
Regardless, this seems like a great topic for some research by the now "product-independent" laboratories for stove testing, such as CREEC and Zamorano and ARC. But the question is: who will pay for these tests, and who will release the results? Past practices have been that "he who pays decides what will be released." And the chances of having both PRAKTI and Envirofit pay and allow comparisons are about slim to none.
And I am not going to pay for it. And the testing centers get paid nothing for testing unless there are sponsors.
So, I hope that the GACC will soon finance some comparative testings of stove STRUCTURES that are not just focused on the combustion devices. AND then do some testing of those same STRUCTURES but with different systems of combustion, such as having Champion or Mwoto or Quad TLUDs under identical 2-pot structures..
Happy New Year to all!!!
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: psanders at ilstu.edu Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.comOn 12/30/2012 4:24 PM, Crispin Pemberton-Pigott wrote:
Dear Richard in NW Obamaland
Agreed. I was looking at the size of the opening at the top and wondering how it burned. I have been working on the use of flame tubes a-la-BLDD6 and earlier versions where the fire is enclosed in a fairly small round channel.
A couple of weeks ago I tried installing a 57mm I.D. flame tube in a horizontal draft two-pot stove (I will add pictures later) to see if the smoke could be burned post-pot-1. It worked pretty well. I do not yet have definitive numbers but as a design approach it definitely worked. There are a number of stoves that have far too much space after the fire, allowing the smoke and flames to take separate routs to the outlet.
So the stove in question has a huge outlet so if smoke manages to get to a corner, it has ample space to escape to the margins away from Pot 2. It seems to me to be worth investigation the % of smoke that can be burned by keeping the smoke and flames together for a while. There are several stoves with a suitable layout for this. One is the three-pot stove used in Indonesia consisting of separate clay round sections with interconnecting tunnels. If the tunnels were reduced in diameter to the point at which they became an impediment to gas flow, that would maximise the chance of burning the smoke. If the flame was entering the tube in the simple experiment I conducted, the smoke was dramatically reduced showing a reproducible and consistent effect.
I really like the cast iron grate in the Prakti stove with a thickened front bar that will resist banging from heavy wood sitting on it.
Regards
Crispin
Crispin,
This seems to be c similar o what was coming from the Dutch TOOL foundation in (A ' dam) in the late 70's. They were trying to replicate them thru our center (AATP) during that time but it never really took on.
Richard Stanley
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
--------------------------------------------------------------------
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
--------------------------------------------------------------------
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2805 / Virus Database: 2637/5996 - Release Date: 12/29/12
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
----------------------------------------------------------------------
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
----------------------------------------------------------------------
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2805 / Virus Database: 2637/6001 - Release Date: 01/01/13
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
--------------------------------------------------------------------------
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
------------------------------------------------------------------------------
_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130102/6a84398d/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Eckoplancha.jpeg
Type: image/jpg
Size: 42584 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130102/6a84398d/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Cocina carb?n TOP.jpeg
Type: image/jpg
Size: 23788 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130102/6a84398d/attachment-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: metalica XRAY.jpeg
Type: image/jpg
Size: 39843 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130102/6a84398d/attachment-0002.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Cocina carb?n BTM.jpeg
Type: image/jpg
Size: 25060 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130102/6a84398d/attachment-0003.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: metalica SHADED.jpeg
Type: image/jpg
Size: 38927 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130102/6a84398d/attachment-0004.jpg>
More information about the Stoves
mailing list