[Stoves] Simple Modifications to Traditional Wood Cookstoves-Rocks and Clay Grates

[Kirk H.]

Ron,

I would agree that flames going up the sides of the first pot would indicate the pots are in parallel, however when I look at Kevin’s video I see flame going from the first pot to the second, which is series.  I also see the flame in the back going directly to the second pot, which is parallel.  I think you and Crispin are both right.

Kevin is doing excellent work, and you’re and Crispin’s comments are also excellent.

Kirk H.

Sent from Mail for Windows 10

From: Ronal Larson
Sent: Friday, April 26, 2019 10:28 AM
To: Kirk H.
Cc: Discussion of biomass cooking stoves
Subject: Re: [Stoves] Simple Modifications to Traditional Wood Cookstoves-Rocks and Clay Grates

Kirk and list:

	See few inserts below.



On Apr 25, 2019, at 3:31 PM, Kirk H. <gkharris316 at comcast.net> wrote:

All,
 
Concerning whether this stove is in parallel or series, I see both.  Some of the fire, in the back, goes directly to the second pot, that is parallel.  Some of the flame from the front hits the first pot and then passes on to the second, that is series. 
	[RWL:  I can agree some but If the first pot allows flame up the sides of the pot, would you agree that has no series aspect?

	The main point I didn’t emphasize enough is that Kevin has started with the simplest possible type of Rocket.  With almost zero cost, he has added two parallel bricks in front of the normal Rocket opening,  This makes the “fuel combustion region” twice as long as normal (the original fuel area only now being minimally used).  The pot sitting on these two new added bricks seems to be receiving about half of the useful energy (more or less is now being tested in Uganda).  I think this is a brilliant addition to ANY rocket - but Kevin’s Rocket is also near zero cost (his bricks are costing less than a nickel each).

	His emphasis on giving away ideas rather than selling products is what makes me so interested in his work.  And using church networks for dissemination.  And even more low-cost dissemination approaches are in the works!

	He is accomplishing a large amount on a minimum budget.   Think what could happen with a iittle more money.

	I have avoided 3-stone fires for 25 years.  A mistake.


 
The use of grooves instead of a pot stand would decrease the open area, and so increase the flow resistance at the second pot.  This may be to direct some heat to the front pot and keep all of the heat from going directly to the small chimney which has the most draft.
	[RWL:  Nice idea.  

	Kevin has been putting most of his effort on introducing small rocks for air control.  He might be able to achieve the same idea as grooves - with small rocks to similarly increase resistance.

	Anyone else have a similar idea to check out?

	Anyone seen any earlier use of a first pot in front of a Rocket?

	I am still trying to figure out a similar simple modification of TLUDs.  Top lighting needs something different.

	Note Kevin is working on three other concepts - all in the category of “give-away”.  Nothing to sell.   His first message a month ago was on rocks to improve air flow below the fuel.  Two more concepts in the works:  char-making and energy storage.  Anyone want to offer their thoughts on these)non-rocket, non-airflow topics?

Ron


 
Thank you all for this great discussion and information.
 
Kirk H.
 
Sent from Mail for Windows 10
 
From: Crispin Pemberton-Pigott
Sent: Thursday, April 25, 2019 1:27 PM
To: Ronal Larson; Discussion of biomass cooking stoves
Subject: Re: [Stoves] Simple Modifications to Traditional Wood Cookstoves -Rocks and Clay Grates
 
Dear Ron
 
		<snip>

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