[Stoves] Lanny Henson's School Lunch Cooker #2

[Lanny Henson]

Crispin,

I do not know the heat transfer efficiency. The pot shell is a compromise 
between HTE and functionality witch will be more apparent in the 3rd video.

A tight fitting pot skirt or a finshell would improve the efficiency along 
with the pot shell and that is a possibility but I am not sure if it is 
worth the extra expense and hassle. The pot shell totally encloses the pot 
and heats the pot from the top as well as the sides and bottom. The pot 
shell also allows cooking outside in the rain. A pot skirt could interfere 
with moving the pot so that could be a problem. A fin shell stays on the pot 
and does dramatically increase the efficiency if you can build one. Here is 
a fin shell on my "Pop Up Fosters Pot" ultra light back pack alcohol stove 
which cooks 600 grams of rice with one table spoon of alcohol.

http://www.youtube.com/watch?v=-sMG2PQ4emI

If you can build them out of something other than thin aluminum which will 
melt when using alcohol, they would improve the efficiency of any stove.

Lanny





----- Original Message ----- 
From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
To: "'Discussion of biomass cooking stoves'" 
<stoves at lists.bioenergylists.org>
Sent: Sunday, July 07, 2013 7:50 PM
Subject: Re: [Stoves] Lanny Henson's School Lunch Cooker #2


> Dear Lanny
>
> Thanks for the clear, concise description.
>
> Do you have a general idea of the heat transfer efficiency?
>
> Regards
> Crispin
>
>
>
> http://www.youtube.com/watch?v=E2U4dY5zjJA&feature=c4-overview&list=UUmRH3cm
> 5dzmsfvERZHEIP7Q
>
> This is my commercial duty wood fired cooking stove the "School Lunch
> Cooker" prototype #2
>
> I designed this stove to cook the larger quantities necessary for school
> lunch programs in developing areas like Haiti
>
> It heats a 40 quart or smaller pot, and a 22" pan, and I am working on a
> cook top adapter for multiple pots.
>
> It is sized for commercial and institutional applications.
>
> This stove will pasteurize water, heat bath, laundry and kitchen water, 
> and
> you can do laundry and dishes in the 40 quart pot.
>
> This cooker is user friendly, is quick to fire and easy to use. It is very
> efficient, very functional and very durable. It burns a variety of wood or
> charcoal. It performs a variety of cooking task, and cooks outside in all
> weather,. It is very portable and is somewhat controllable.
>
> This stove is less hassle than portable propane fired stoves considering 
> the
> time and expense to refill tanks.
>
> I have two more videos coming soon, one is of a newer prototype and I will
> have some information about the unique TLC "top lit combustor" burner.
>
> Lanny Henson
>
>
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