[Stoves] Summer Stove Camp 2015 Agenda

Dr.-Ing. Dieter Seifert doseifert at googlemail.com
Fri Jul 31 02:06:27 MDT 2015


Dear Crispin,

The actual price of the traditional charcoal stove (brazier) in Lusaka 
may be less than 5 USD. I have put the figure to show that the costs for 
the households derive from the charcoal is 5 times (or more with your 
data) per month of the investment for the brazier.

I do not advocate stoves which use traditional charcoal, even if they 
are much more fuel efficient. A small calculation shows, that the factor 
mass of wood/mass of produced charcoal, which is between 5 and 10, 
cannot be compensated by the NCV and the efficiency.  The main evil is 
that trees are cut; the consequences are demonstrated e.g. in Haiti and 
Madagascar (where urban households get their charcoal from remaining 
trees logged in a distance of 800 km and transported in the form of 
charcoal).

The Ben stoves can be produced with costs less than 10 USD, and I hope 
we can convince urban households in countries affected by deforestation 
that the necessary small amount of dry sticks (not damaging trees) are a 
better, much cheaper and less emitting fuel - as a first step to 
conserve and improve their livelihood.

With kind regards

Dieter



Am 28.07.2015 um 14:37 schrieb Crispin Pemberton-Pigott:
> Dear Dieter
>
> Is $5 the price of a current traditional stove in Lusaka? I ask because it is quite a bit higher  than it used to be: $1.50.
>
> The wholesale price of a small Keren Stove in Yogyakarta is $0.20. Bigger ones run from 50 cents to a dollar. A $5 has to offer a lot more to attract buyers.
>
> By offering much more fuel-efficient charcoal stoves the impact on the trees is very large, as you indicate. There is lots of room for improvement of the entire chain, all elements of it. A stove that saves $10 a month in fuel that costs $30 makes sense, if people can afford to save that much.
>
> Regards
> Crispin
>
>
> Dear Crispin,
>
> The mean expenditures for charcoal of an urban household in Zambia are
> around 25 USD per month (consumption of more than 1.3 tons of charcoal
> per household per year). The price of the typical metal charcoal stove
> is about 5 USD. The urban households in Zambia will possibly be able to
> cause extensive deforestation of the country during one generation with
> these charcoal braziers. If the price of charcoal would reflect also the
> damage on nature and health, the price would be still higher. I write
> this because I cannot agree with your “too expensive”. A three stone
> fire can be extremely expensive, if holistically calculated. I designed
> the fuelwood stoves Ben 2 and Ben 3 (http://solarcooking.org/Ben3)for
> free use keeping this in mind.
>
> With kind regards,
> Dieter
>
> Am 27.07.2015 um 19:25 schrieb Crispin Pemberton-Pigott:
>> Dear Jed
>>
>>
>>
>> Thanks for the pictures. I was thinking you had a ceramic stove (like pottery).  For the really cheap stoves I was referring to, there is no metal. Too expensive. There is one called an Anglo Supra and Anglo Supra Nova. They have a metal shell and clay interior. They sell for about $5.50. Usually they burn charcoal but small wood is also used.
>>
>>
>>
>> I am looking for something that will be made from clay only. Here is the traditional clay Keren Stove.
>>
>>
>>
>>
>>
>>
>>
>> That is the baseline product. They should also make TLUD’s, I think.
>>
>>
>>
>> Regards
>>
>> Crispin
>>
>>
>>
>>
>>
>> Attach are three more photos of the stove in operation.
>>
>> We had problems lighting the the fuel from the top to run it in TLUD mode during the tests and greatly discouraged the cook of the food stall in the public market.
>>
>> However, the high point of the test is upon realizing that the stove can run clean on their stocks of coco charcoal in strong and smokeless flame.
>>
>> The stove ran for one hour with six pieces of coco charcoal.
>>
>> The food stall consume one bag (about 35 kilograms of wood charcoal per day) for their four units of wood charcoal stoves.
>>
>>
>>
>>
>>
>>
>> Joshua B. Guinto
>>
>>
>>
>>
>>
>>
>>
>>
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>
>
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