[Stoves] Story about a successful TLUD in Indonesia
Muhammad Nurhuda
mnurhuda at ub.ac.id
Fri Jul 24 08:28:39 CDT 2015
Dear all,
Sorry for my late response, because it was still in Idul Fitri holidays
(Ramadhan end month festival).
I have contacted Ms. Camilla to respond all questions regarding the
marketing and distribution of the Prime stoves, and she will do soon.
Have a nice weekend.
Regards
M. Nurhuda
On Mon, Jul 20, 2015 at 6:13 AM, Ranyee Chiang <rchiang at cleancookstoves.org>
wrote:
> Dear Ron and all,
>
> I have forwarded your suggestion about testing to the Project Leader and
> Convenor of the ISO Technical Committee 285 Working Group that is working
> on improving laboratory testing. This working group is making improvements
> to and expanding existing lab protocols to address multiple stove/fuel
> combinations, cooking practices, emissions, efficiency, safety, and
> durability.
>
> The development of testing protocols is being done by many partners
> through a consensus-based process. If anyone has recommendations and ideas
> for the protocols being developed, the best way to influence things is to
> participate directly. For more information about how the ISO process,
> please see
> http://cleancookstoves.org/technology-and-fuels/standards/how-to-participate.html.
>
>
> Best regards,
>
> Ranyee
>
>
> Begin forwarded message:
>
> *From:* "Ronal W. Larson" <rongretlarson at comcast.net>
> *Date:* July 19, 2015 at 6:25:53 PM EDT
> *To:* Discussion of biomass <stoves at lists.bioenergylists.org>, Dean Still
> <deankstill at gmail.com>
> *Cc:* <camilla.fulland at primestoves.com>, Muhammad Nurhuda <
> mnurhuda at gmail.com>
> *Subject:* *Re: [Stoves] Story about a successful TLUD in Indonesia*
> *Reply-To:* Discussion of biomass cooking stoves <
> stoves at lists.bioenergylists.org>
>
> Dean and List cc Prof. Nurhuda and Ms. Fulland
>
>
>
> Agreed. Turn Down Ratio (TDR) is critical. We
> should be able to get 3:1 with TLUDs - and maybe more (Kirk Harris has
> sometimes done better). I should have asked Prof. Nurhuda and Ms. Fulland
> to comment on TDR and power levels as well as my other questions. The
> story says they developed a larger TLUD model because of customer feedback.
> The video of operation shows a sliding door that certainly can have a
> maximum/minimum aperture ratio much greater than 3.
>
>
>
> Your comment on avoiding constant tending is very
> important. Present testing is not mirroring what happens in the field. I
> hope that we can hear of new EPA/GACC stove testing protocols that include
> both limiting tending time and recording it.
>
>
>
> I should have also noted that a standard fuel for
> this stove is short hunks of relatively thin branches. Takes some more
> effort but can go quick with a machete or axe/hatchet. That’s a lot
> faster/easier than splitting large logs and not much more work than cutting
> to a uniform length. I’ve forgotten the optimum angle for cutting but I
> think is a little more acute than 45 degrees. Stacking vertically leaves
> too large an air space (not enough flow resistance). I hope we can hear
> more about the satisfaction in the Philippines also with this fuel.
>
>
>
>
>
> Best of luck in your upcoming stove camp.
> Aprovecho is providing a very valuable service. Please give us some daily
> feedback on what is happening soon in Cottage Grove.
>
>
>
> Ron
>
>
>
>
>
> On Jul 19, 2015, at 2:16 PM, Dean Still <deankstill at gmail.com> wrote:
>
>
>
> Hi Ron,
>
>
>
> We have also gotten positive feedback about using TLUDs. In my opinion,
> folks seem to like the batch fed stoves, like coal, charcoal, liquid, and
> gas that don't need constant tending. They may not like a TLUD if it burns
> the rice, etc. with inadequate turn down. Propane stoves, and other stoves,
> can have too low high power for making good tortillas.
>
>
>
> Best,
>
>
>
> Dean
>
>
>
> On Sun, Jul 19, 2015 at 7:38 AM, Ronal W. Larson <
> rongretlarson at comcast.net> wrote:
>
> List: cc Prof. Nurhuda and Camilla Fulland
>
>
>
> 1. This is to encourage all stovers to read the nice story about the
> Indonesian firm “Kopernik”, with much about Prof. Nurhuda and his TLUD
> stove, and the firm “Prime Stoves”. I get the (free) print copy of
> “Boiling Point” (BP), but think you can get there through:
>
> http://www.hedon.info/BP:Latest%20Issue
>
> Then you have to download - but maybe first sign up.
>
>
>
> 2. One quote (emphasis added about being the *most popular* stove - the
> first time I have seen this for a TLUD):
>
> *"In their search for an appropriate cookstove, Wojkowska and Nakamura
> were introduced to Professor Muhammad Nurhuda, a lecturer in theoretical
> physics at Brawijaya University in Malang, East Java. Professor Nurhuda had
> been working on the development of a top-lit uplift gasifier stove, named
> the UB.03-01 stove. This stove used up to 80% less wood than a three-stone
> cookfire and produced no smoke when burning dry fuel. Made from sheet
> metal, the stove was lightweight and easy to transport - a valuable feature
> in order to expand distribution to remote islands. The factory price of the
> stove, less than US$ 13, was far lower than imported cookstoves (in the
> range of US$ 30-50) and there was no risk of shipments being delayed in
> customs. This confluence of innovative design, fuel-efficiency, portability
> and affordability made the stove extremely attractive from a technical and
> economical viewpoint.*
>
>
>
> *The UB.03-1 stove was regularly selected as the most popular clean
> cookstove at these events. In Bojonegoro, East Java, it was voted the most
> popular product of all technologies including solar lights, water filters
> and agricultural technologies. *
>
>
>
> *A further key supply chain development came in late 2013 when Norwegian
> investment group Differ became the majority investor and distributor of
> Professor Nurhuda’s UB.03-1 cookstove.”*
>
>
>
> 3. Most of the story was about the distribution system set up by
> Kopernik, which company can be found at: http://www.kopernik.ngo/
>
>
>
> 4. There is a good bit about a firm called Prime stoves (
> http://www.primestoves.com/team/), headed by Ms Fulland
>
>
>
> 5. Dr. Nurhuda and Ms. Fulland:
>
> Can you add anything on why the stove purchasers liked your TLUD stove
> better than others? (time saving? using the char?, smoke reduction?,
> able to use small branches?, making money?, saving money?, etc?
>
>
>
> I would have liked to included an address for the founders of Kopernik (*Wojkowska
> and Nakamura) *, so hope you will see if they also wish to comment.
>
>
>
> Congratulations to all involved, especially the Hedon publishers of BP,
> who I presume read this list some.
>
>
>
> Ron
>
>
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>
>
>
>
> --
>
> Dean Still
>
> Executive Director
>
> Aprovecho Research Center
>
> PO Box 1175
>
> 76132 Blue Mountain School Road
>
> Cottage Grove, OR 97424
>
> (541) 767-0287
>
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