[Stoves] Urgent Support Gaza Industrial Stove Design

Tue Nov 14 21:46:59 CST 2023

Dear Christina

Here is my work corollary to that of Kevin's and most other stovers.

In consideration that the entry of building materials into Gaza is
restricted.

Hopefully, bricks are available.

It is built with bricks stacked on top of one another. Hacksaw blade is
the only tool necessary plus a few scoops of clay. Metal parts are optional
but it can be very useful if available.

It also abides by the holes described by Kirk in here that are having
primary air ports and secondary air ports constructed through the bricks.

I present to you the Stage 1 of this model.  Attached are the drawings and
some photos of our prototype.

It can run as a TLUD Gasifier and switch to a rocket mode after the first
load/batch of fuel has been consumed. A detachable brick piece serves as an
air plug to effectively control primary air or open up for side feeding of
fuel sticks.

Lighting begins at the top, with the aid of fire starters such as charcoal,
twigs, paper, drop of oil or wax. Air may be blown from below during
ignition.

Char can be collected (highly encouraged)  or spent for cooking entirely.
Simply drop the hot embers into a pan of water.

Collected char may be mixed with compost to make emergency container
gardens. Pulverize the char.  Recommended ratio is 3 parts biochar to 1
part compost.

If bricks are not available, please let me know, I will prepare another
email to describe how you can build out of the rubbles.... tin roof, soil,
wire cables etc.

All the best to your work. Keep safe.

Joshua (Jed) Guinto
Bahay Teknik
Philippines

*Joshua B. Guinto*Specialist, Appropriate Technology
MSc Management of AgroEcological Knowledge and Social Change (MAKS)
Wageningen University, The Netherlands 2006 to 2008
Recipient, International Fellowships Programme  Award (IFP) 2005
Ford Foundation

On Wed, Nov 15, 2023 at 10:04 AM Harris, Kirk <gkharris316 at comcast.net>
wrote:

> Christina,
>
> Looks like a TLUD stove.  Are both primary and secondary forced air?
>
> Construction:
>
> Close all the holes in the sides of the inner chamber except the top row.
> Double or triple the number of holes in the top row.
>
> Cut out the pot stand angle iron over the hole to get more even heating of
> the pot.  Better yet, place the angle iron radially instead of parallel.
> Do not cover the hole.  Turn the angle iron over so a flat side is attached
> to the top, and a vertical side of the angle iron rises for the pot stand
> in an L shape.
>
> Add a concentrator (a plate of metal with a moderately smaller diameter
> hole in it) to the top of the combustion chamber to concentrate the gas and
> heat for better combustion.  Make the hole around 18 to 20 cm, centered
> over the combustion chamber.
>
> You could probably get by with natural draft, getting rid of the solar
> panel, battery, wiring, and fan, if the bottom of the stove is open to
> allow air in.  The photo of the functioning stove shows way to much flame.
> At least reduce the fan speed.
>
> Use a larger pot for more efficient heat transfer.  Optional:  Adding a
> skirt around the pot would increase the heat transfer and reduce the fuel
> use.
>
> Use:
>
> Be sure the cook knows the proper function of the stove.  Add the fuel up
> to, but not above the top row of holes on the sides of the inner chamber
> (now the only holes in the sides).  Ignite the fuel on the TOP only.  Do
> not add more fuel, it is a batch type stove.    After the flame stops,
> remove the chamber and dump its contents, then add more fuel to repeat the
> next burn.  Char can be burned, but it is very hot, and corrosive to the
> metal (shouldn't be a problem since the chamber is removable and
> replaceable).
>
> Wishing You well,
>
> Kirk H.
> On 11/14/2023 1:00 PM, Christina Espinosa wrote:
>
> Hi Listserv!
>
> I have a team in Egypt working on a quick manufacturing design to be able
> to send into our cooking partners in Gaza ASAP. Rules are strict on what
> gets let in and there is almost no fuel inside Gaza for cooking. They
> currently have a pellet design with a fan. I was hoping that someone might
> be willing to jump on a call with me or the team there ASAP to try and
> troubleshoot some problems they have in the design. This is where they are
> at now. But they need to be able to make these ASAP and all of the large
> manufacturers have long turn arounds and shipping costs.
>
> Please let me know if anyone would be able to help.
>
> You can email me directly at Christina at wck.org
>
> Best,
>
> Christina
> Director of Clean Cooking
> World Central Kitchen
>
>
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