Dear M. Nurhuda,
Thank you for the info.
Many of us are curious about your workshop to produce such nice items.
Questions include the equipment, personnel, and production capacity.
With appreciation,
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 11/5/2012 1:13 AM, Ron Larson wrote:
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] <mailto:[email protected]>>
*Date:* November 4, 2012 5:01:46 PM MST
*To:* [email protected] <mailto:[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]
<http://webmail.ub.ac.id/src/compose.php?send_to=mnurhuda%40ub.ac.id>
> To:[email protected]
<http://webmail.ub.ac.id/src/compose.php?send_to=stoves%40lists.bioenergylists.org>
> 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
> _______________________________________________
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