[Stoves] Smoke-free biomass pellet fueled stove

[mnurhuda at ub.ac.id]

Dear Mr. Larson, Dear Prof Anderson,

I have answered the email of Mr. Larson in his private address, but the
email was unfortunately bounched.

Currently I am awaiting for flight to Jakarta, such that I have only a
little time to give answers.

The effect of pre-heating is significant. One of my student has been
devoted his diploma work for this study. The result is clear, that
pre-heating can improve the efficiency of combustion, because the radiant
heat produced by burning tube is returned back in term of heated air to
the burning chamber such that the combustion becomes much better.

The difference between the traditional TLDU stove and our stove is merely
the presence of additional cylinder between housing tube and burning tube.

Ok... I have to go now...have a nice day...

Regards
M. Nurhuda


> Dear Ronal and Prof. Nurhuda,
>
> I too await the answers to Ron's questions.   And add a comment about
> what Ron wrote:
>> 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)
> I cannot think of anyone preheating primary air in a TLUD to any
> significant degree.  That is because there is no serious heat in the
> lower areas of TLUDs until the pyrolysis front makes it at least half
> way down the column of fuel.  And then the heat is by conduction through
> the metal sidewalls.
>
> Looking at the video by Nurhuda, I do not detect any effort to pre-heat
> the primary air.   He can clarify that for us.   What is important is
> the quality of the control of the amount of primary air that can
> enter.   VERY  WELL DONE.   His stove should be a case study of
> industrial manufacturing of natural draft TLUDs.
>
> I request from Prof. Nurhuda as much additional information as
> possible.   The more that everyone and the GACC knows about the
> Indonesia TLUD success story, the more opportunities there will be for
> the further scaling up to serve people in Indonesia and elsewhere.
>
> 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 11/3/2012 11:47 AM, rongretlarson at comcast.net wrote:
>> 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
>> ------------------------------------------------------------------------
>> *From: *mnurhuda at ub.ac.id
>> *To: *stoves at lists.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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>
>