[Stoves] Stove costs

[Paul Olivier]

I am not a big believer in tin can stoves that last a short while and must
be discarded after a few months.
Poor people deserve gasifiers that last a long time.
We should not offer poor people cooking units that we would not be proud to
operate in our own kitchens.
I believe it is possible to make high-quality gasifiers that sell for less
than $20.
For example, a reactor made in ceramic can withstand heat as high as 1,750
C,
Yet it can be bought for about $4.50 US.

Also in the context of producing gas for purposes of cooking,
I favor true, high temperature gasification (>700C), not pyrolysis.
The principle idea is to produce a clean gas consisting, above all else, of
H2 and CO.
It takes a lot less secondary air to burn H2 and CO than to burn methane,
propane or butane.
In a cooking situation, we should not be concerned with producing acetic
acid, oils or even methane.
Biochar is important, but it is a by-product of the production of a clean
cooking gas.

Here is a small gasifier of an interior diameter of 100 mm:
http://dl.dropbox.com/u/22013094/100%20Ceramic%20Gasifier/001.pdf
The reactor here consists of a ceramic pipe normally used as a conduit for
molten metal.
This gasifier has a low-pressure, semi-premix burner.
It is not designed to support pots and pans.
Rather it fits into a stove top which does so.

Thanks.
Paul


On Sat, Nov 19, 2011 at 5:41 AM, Max Turunen <maxturunen at gmail.com> wrote:

> Very cheap gasifier for Yard Only -use:
> http://holon.se/folke/carbon/simplechar/simplechar.shtml
> Uses only old barrels and some rocks/bricks... but has limited lifespan.
>
>
> MaxT
>
>   Why sell gasifier stoves... when one can display instructions for making
> various sorts of gasifier stoves, from local materials, by local people...
> chosen by local people ? (on non gasifying side there seems to be some
> really high precision clay cooking+heating stoves... which might be used
> for gasifying with old cans containing biomass in them, upside down, for
> pyrolysis gasifying reaction)
>
> On Fri, Nov 18, 2011 at 11:38 PM, Jan Bianchi <janbianchi at comcast.net>wrote:
>
>> **
>>
>> Do any of you know of a list that compares different clean burning cook
>> stoves not only by fuel type, efficiency and emissions, but also by price
>> and the presence or lack thereof of subsidy?  I don’t see the latter
>> information on most websites that describe different stoves. ****
>>
>> ** **
>>
>> If there isn’t such a list, maybe we could work to put together one by
>> each of you sending a link that describes a stove and stating the price
>> they are currently being sold for in local communities, together with
>> whether there is a subsidy and if so the amount?  I’d be happy to work with
>> **Erin** to put together such a list from your answers.****
>>
>> ** **
>>
>> For people living on $2 a day or less, what for example would be
>> considered a low cost stove?  Middling?  High?****
>>
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>>
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>
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-- 
Paul A. Olivier PhD
27C Pham Hong Thai Street
Dalat
Vietnam

Louisiana telephone: 1-337-447-4124 (rings Vietnam)
Mobile: 090-694-1573 (in Vietnam)
Skype address: Xpolivier
http://www.esrla.com/
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