[Stoves] Jatropha fruit as fuel? - and possible action

B.C. Romero Orellana bcromero at gmail.com
Sun Jan 20 16:38:02 CST 2013


Dear all: can be used the by product of jathropha oil production waste to
made briquets and use a hood to remove the smoke.?

It can be possible if the women do not move the stove from room to room
every other day  Is that the case in the places that you are trying to use
it?

2013/1/20 Dean Still <deankstill at gmail.com>

> Hi All,
>
> I'm finding that Tier 3 performance is very demanding, hard to achieve.
> The TLUD and the prepared fuel (I find that only small pellets burn cleanly
> enough) have to be in harmony to meet the Tier 3 level at high and low
> power. It's all possible but exacting.
>
> Best,
>
> Dean
>
> On Sun, Jan 20, 2013 at 8:53 AM, Paul Anderson <psanders at ilstu.edu> wrote:
>
>>  Stovers,
>>
>> Excellent discussion.  Jon's message below puts it into perspective.  I
>> oversimplify what Crispin has said in the past:  There are no bad fuels,
>> just bad stoves.  (Exaggeration has its impact!!   Basically, I agree with
>> Crispin.)
>>
>> And Paal Wendelbo always says:   Start with the fuel.   And Jon points
>> out the abundant Jatropha seeds.   I add that "abundance" in nature is not
>> the same as abundant in supply, meaning that it fuel needs to be
>> collected.   So we have the chicken and egg problem of which comes first.
>> Leaving that aside, please note.
>>
>> 1.  Jatropha and other oil-seeds not only yield pyrolytic gases and char
>> and heat, they also yield great amounts of vaporized oils that are
>> combustible.  That difference is vastly important for the TLUD gasifier
>> (all micro-gasifiers) operations.   That means, MUCH MORE SECONDARY AIR is
>> needed.  It is not sufficient to simply turn down the primary air.   And on
>> this basis, I believe that ONLY gasifier stoves are viable candidates to
>> have sufficiently clean combustion for Jatropha-seed fuel.
>>
>> 2.  We cannot ignore the need for some chemical analysis of the emissions
>> from the stoves AFTER the good combustion of the gases.  Can any bad stuff
>> survive the high heat of the combustion stage in a gasifier stove?
>>
>> 3.  Two known and proven and accomplished ways of successfully using
>> Jatropha (oil-seed) seed fuel in a TLUD stove.   Natural draft (TLUD-ND) is
>> accomplished by the Jiko Safi by Jet City Stoveworks.   It has a central
>> pipe for additional secondary air.  More holes for secondary air to mix
>> into (with less distance to move horiziontally) the volume of fuel rich
>> gases.   Someone suggested removing that central pipe.   That does not
>> work.   That was tried before the success came with the central pipe.
>> Step back for actual success, repeat what was not successful earlier, and
>> make no progress.   Anyone is welcome to try it again.
>>
>> 4.  TLUD-FA (forced air or fan-asssisted) with Jatropha seed fuel has
>> also been successful.   It was done by Nathan Puffer and seen as
>> Gasifier/CHAB stove camp in 2010 at NESFI in MA.  Done.  It can be
>> improved.   But there are no funds to undertake its refinement.   And then
>> it has the higher price factor that puts these stoves out of purchasing
>> reach of those who need them.   AND you have to get the fuel supply chain
>> functioning.  Nathan (of New Hampshire) is active for a couple of decades
>> in Kenya, and his latest work is with the natural draft TChar TLUD-ND in
>> Kenya.  Financial assistance would be appreciated and appropriate.  (I will
>> be mentioning more about his TChar work in my presentation at ETHOS next
>> week.  I might entitle my presentation:   "Unsung Heros of TLUD Stoves",
>> but I cannot find many who have been "Sung").
>>
>> Jonathan concluded:
>>
>> The point of importuning my stove list colleagues on a fine Sunday
>> morning is to interest other stove makers to look at Jatropha and other
>> energy-rich seeds as a category of fuel worth consideration for new stove
>> designs.  We are modestly pleased with the performance of the jiko safi,
>> but we also know that some of you with far deeper understanding of
>> gasification and far more experience in stove design could produce a much
>> better model.  Anyone want to take up this challenge?
>>
>>
>> Yes, but there needs to be some financial support.   Personally, I am
>> pressed too thinly for money and time to undertake anything without serious
>> co-workers/partners/associates/backers.  Solutions that are needed do not
>> grow on trees (although the fuels do).  So far I have not seen any GACC
>> funding that can be directed to the R&D efforts for stoves such as
>> Jatropha-seed TLUDs.  That is NOT the mission of the GACC.  Other sources,
>> maybe exist.   On the other hand, GACC support for an EXISTING product
>> (the Jiko Safi) could stimulate sufficient business that the owners can
>> also do some refinements that would soon be evident in the second wave of
>> production.  If we are going to get the NEEDED stoves, we must acknowledge
>> that there will be improvements on the existing stoves.  If that means R&D,
>> then that must happen.   But we just need to have it done by companies that
>> are sufficiently funded to be successful enough to study, learn, and
>> improve their stoves.
>>
>> Summary:  This topic keeps coming up, and it is time to do something
>> about it.
>> 1.  Support for Jiko Safi stove (Jet City Stoveworks -- the Otto brothers
>> plus)(Tanzania base)
>> 2.  I will assist, and can bring Awamu Biomass Energy Ltd (Uganda) into
>> participation
>> 3.  Nathan Puffer (focus on Kenya efforts)
>> 4.  Others  (self-nominate here)
>> 5.  Some sources of funding (we do not know who you are, so please speak
>> up)
>> 6.  Others (who will gladly join when some funding is available.)
>>
>>
>>
>>
>>
>> Paul S. Anderson, PhD  aka "Dr TLUD"
>> Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
>> Website:  www.drtlud.com
>>
>> On 1/20/2013 8:23 AM, Jonathan Otto wrote:
>>
>>  Hey Richard,
>>
>> Not sure why you feel my briquetting education has been neglected, since
>> that kind of fuel is not mentioned in any of my postings; but I certainly
>> subscribe to Dean's comment: we all have a lot to learn about such
>> alternative fuels. I would add: and the stoves that burn them in a truly
>> clean way.  Which brings up the question: if a briquette or pellet is
>> burned in an open charcoal brazier, do we have a clean energy source? To
>> put in another way, there are no 'clean' or 'dirty' fuels; it's combination
>> of fuel and stove that must be evaluated together for emissions and other
>> performance parameters.
>>
>> My densified fuels question to Otto the Senior or anyone else who can
>> enlighten me concerning the logic of pelletizing Jatropha presscake.  If
>> farmers grow their own energy-dense, uniform-sized fuel, i.e., whole
>> Jatropha seed, why complicate matters by processing that ready-to-use fuel
>> into another fuel? No matter how efficient the pelletizing process,
>> it must require time and energy. Why not burn these seeds directly in a
>> micro gasifier stove, such as our jiko safi?
>>
>> Let me try to head off some likely comments. I know that there are
>> companies in many African and Asian countries engaged in commercial
>> scale production of Jatropha (and other biofuel crops) for export
>> of biodeisel. Land grabbing and other nefarious activities of some of these
>> players are obscene, as once again the global north exploits tropical
>> countries for cheap/free land and cheap labor to meet its own needs.
>>
>> Yes, those Jatropha oil export ventures produce presscake as a by-product
>> which they pelletize and market for fuel.  And yes, some smaller operations
>> in a few countries like Uganda, are trying to make a go of producing
>> Jatropha-based biofuels for local and regional energy markets.  But for all
>> the publicity, most of it appropriately negative, in the 'food vs. fuel'
>> analysis, there's a lot more to Jatropha than current attempts to put the
>> oil in European cars and jet engines.
>>
>> Far apart from all these recent commercial Jatropha ventures, many
>> of which are unprofitable for reasons we can discuss another time if
>> anyone's interested, are many millions of farmers in over 110
>> countries who use Jatropha as a living hedge and for medicianl uses. Seems
>> it's grown in every frost-free area of the world. I've found it from
>> Cuba -- it's native to the neo-tropics -- to Mali, which has thousands of
>> kilometers of hedges, to Bhutan where villagers were obliged to pay a
>> Jatropha tax to monks for lighting in floating wick lamps.
>>
>> My guess is that over 99% of all Jatropha seed fall to the ground and
>> rot, unused. (One study in a district of Tanzania where Jatropha seed is a
>> traded commodity found that only 6% of  seed is harvested.) As we all
>> search for renewable, sustainably harvested biomass to fuel our favorite
>> stoves, can we afford to overlook seeds of this ubiquitous, multi-use
>> species?
>>
>> The point of importuning my stove list colleagues on a fine Sunday
>> morning is to interest other stove makers to look at Jatropha and other
>> energy-rich seeds as a category of fuel worth consideration for new stove
>> designs.  We are modestly pleased with the performance of the jiko safi,
>> but we also know that some of you with far deeper understanding of
>> gasification and far more experience in stove design could produce a much
>> better model.  Anyone want to take up this challenge?
>>
>> Over to you,
>>
>> Jonathan
>>
>>
>>  ------------------------------
>>
>>
>>
>> _______________________________________________
>> Stoves mailing list
>>
>> to Send a Message to the list, use the email address
>> stoves at lists.bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>>
>> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>>
>> for more Biomass Cooking Stoves,  News and Information see our web site:
>> http://www.bioenergylists.org/
>>
>>
>>
>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://www.bioenergylists.org/
>
>
>


-- 
Carolina Romero
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130120/e904d61b/attachment.html>


More information about the Stoves mailing list