Lists: Prof. Nurhuda has ok'd my forwarding this additional information on his recently announced stove.
Ron Begin forwarded message: > From: Muhammad Nurhuda <[email protected]> > Date: November 4, 2012 5:01:46 PM MST > To: [email protected] > Subject: Re: [Stoves] Smoke-free biomass pellet fueled stove > > Dear Mr Larson, > > Thank a lot for your email. The stove is my recent attempt in order > biomass pellet can be well burnt. Previously, I developed stove fueled wit > palm kernel shell. Even the stove was excellent for palm kernel shell, but > it is not immediately good for biomass pellet. There are a lot of things > that have to be optimized. > > Yes, the excess air can be seen from the appearance of the flame. Optimal > secondary air would produce very transparent,short flame, though it must > not be blue...... Mr Crispin Pemberton Pigott has witnessed the stove > as I demonstrated it in Yayasan Dian Desa, last October. > > I just started to sell this pellet stoves. At the moment, I got purchasing > order of 1200 stoves. It occurs after the buyer perform test by himself. > However, due to limited capacity of our workshop, the buyer must wait up > to 3 months right now. At the moment, we are manufacturing 1600 > chopped-wood fueled stoves for project in Sumba Island, Indonesia. > > The percentage of charcoal by weight is 20-25%. Some time it is less. But > certainly, our stove burns the smoke very well until the last smoke > production. > > Biochar is char that contains volatile matter (VM) less then 3%. When the > VM is still high, let say 5%, the reaction of VM and water can lead the > acidic soil condition, and it is not good for the plant. We believe that > the biochar produced by combustion of our stove is VM-free, such that it > is good for soil conditioner. > > As you might know, my background is a theoretical atomic and laser > physicist. I do not know some specific terms like turn-down ratio. I > started to develop stoves in the late 2008. In addition, I do not have > laboratory, just small workshop that produces the stoves. So far, the > performance tests are performed by external laboratories. In 2010 test > performed by PT Puser Bumi in cooperation with directory of bioenergy, > republic of Indonesia, our wood chopped stoves was the best among other 60 > stoves. > > Kind regards > M. Nurhuda > > > Prof. Nurhuda > > This is a really fine looking stove. The part that intrigues me most is > that you are controlling secondary air for the pyrolysis gases. And > apparently doing it (and primary air) well with the rotating disc > mechanism. I do not recall seeing any other stove controlling both > (without a fan) - so any data on the value of that for users of the stove > > could be very helpful to others. (Can they control excess air by the > look > > of the flame?) > > A few questions: > > the price? > > sales going well? > > what percentage char by weight? > > any soil improvement results from using the biochar? > > can you do more than a 4:3 turndown ratio? (based on your two stated > power > > levels) > > apparently you are striving for biochar (great!), but can you describe > conditions if you try to burn the produced char? > > any efficiency data? > > you appear to be pre-heating both primary and secondary air - can you > attribute any performance improvement to that? (I know of no-one else > doing both) > > Thanks for the alert on your stove. > > Ron > > ----- Original Message ----- > > From: [email protected] > > To: [email protected] > > Sent: Saturday, November 3, 2012 5:03:54 PM > > Subject: [Stoves] Smoke-free biomass pellet fueled stove > > Dear all, > > Please check to following page to see the video of our smoke-free, > biomass-pellet fueled stove: > > http://www.youtube.com/watch?v=uWt25oD1iWk&feature=youtu.be > > Kind regards > > M. Nurhuda > > _______________________________________________ > > Stoves mailing list > > to Send a Message to the list, use the email address > > [email protected] > > 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 [email protected] 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/
