[Stoves] coconut usage in improved stoves continued

[Paul Anderson]

Hi,

Nice unit.   Forced air greatly helps.   Are you willing to post or 
share diagrams of the unit?

Paul

Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
Website:  www.drtlud.com

On 6/16/2013 5:51 PM, M. Nurhuda wrote:
> Dear All,
>
> Perhaps gasifier/burner like this (see attached picture) can be used to
> burn coconut husk easily.
>
> It is an open-top gasifier, such that user can easily add fuel from the
> top.  I also employed semi cyclonic system to filter the dusk.
>
> That was three years ago.
>
>
> Regards
> M. Nurhuda
>
>
>> Dear All
>>
>>
>>
>> I have spent some time trying to burn whole coconut husks âEUR" some may
>> remember the reported experiments some time in 2003.
>>
>>
>>
>> The motivation was the fact that Mozambique has a huge amount of the
>> material lying around and while it is used for a domestic fuel, it is
>> pretty awful. It is heaped around pots and burned with a great deal of
>> smoke.
>>
>>
>>
>> I was in Swaziland at the time (where New Dawn Engineering is located) and
>> was developing the Vesto. A number of experiments were conducted using a
>> Tsotso stove which can burn just about anything. The observations were
>> that the husks can burn very cleanly (visibly clean, at least) if it is
>> burning in a staged process. While the fuel can hold considerable
>> moisture, once it is heated to the point of getting rid of the steam, it
>> is able to burn well, producing a white smoke that supports combustion if
>> given preheated secondary air.
>>
>>
>>
>> In order to sustain a burn it is essential that the fuel be dried enough.
>> It is likely that any practical device will have a method of supply new
>> fuel continuously or in batches, perhaps pushed in from the side or the
>> bottom. Preheating the primary air is essential because of the retained
>> moisture.
>>
>>
>>
>> Because the âEUR~fuel particlesâEUR^(TM) are so large, the device will have to be
>> large. If it is a TLUD or downdraft (BLDD) stove it implies that he
>> chamber will be >6 times the particle size. If the husks are not cut into
>> pieces that implies a diameter of perhaps 60-75 cm. I guess the power
>> level would 10-20 kW. To be useful the things should perhaps be 1.5-2
>> metres high.
>>
>>
>>
>> At that size, it could be used to make soft charcoal on a reasonable scale
>> for briquetting. Given the vast local market for charcoal in Mozambique it
>> might make sense, all things considered.
>>
>>
>>
>> Regards
>>
>> Crispin
>>
>>
>>
>>
>>
>>
>>
>> Paul
>>
>>
>>
>> What would a TLUD sized for coconut husks look like? Can you suggest
>> dimensions and a fuel size?
>>
>>
>>
>> Tom
>>
>>
>>
>>
>>
>>
>> --
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