[Stoves] Ulaanbaatar Air Quality

[mnurhuda at ub.ac.id]

on and all,

I do not use biomass pellet nor briquettes, but coal briquettes with
diameter around 3 cm.

For pellet, I also developed another stove, but at moment the longest
burning time is only 6 hours. 

You are right, the stove is only for space heating, since I developed the
stove based on the request of chicken farm industry.

The pre-heating are performed in two ways, through outer and inner
cylinder.

We adjust the opening of primary air only to control the fire power.

Regards
M. Nurhuda




On Sat, 9 Nov 2013 13:42:23 -0700, "Ronal W. Larson"
<rongretlarson at comcast.net> wrote:
> Nurhuda  cc list and Crispin:
> 
>    Added questions:
> 
> 1.  Have you used it also with any form of biomass (pellets, chips, etc)
> and does it behave differently with biomass vs coal, char?
> 
> 2.    With biomass, what weight percentage of char output is possible?
> 
> 3.   It appears that this is primarily for space heating.  Have you used
> it for cooking?
> 
> 4.   Perhaps the fuel load fills the entire outer cylinder volume?  No
> outer annulus preheating?
> 
> 5.   Is it possible to control primary air (and power levels and turn
down
> ratios) using plugs or an outer control “band”?
> 
> Thanks for sharing.
> 
> Ron
> 
> 
> On Nov 9, 2013, at 10:41 AM, crispinpigott at gmail.com wrote:
> 
>> That looks really good!
>> 
>> Nice short flame. 
>> 
>> Does it burn coal and charcoal?
>> 
>> Thanks
>> Crispin 
>> 
>> From: mnurhuda at ub.ac.id
>> Sent: Saturday, November 9, 2013 10:30
>> To: Discussion of biomass cooking stoves
>> Reply To: Discussion of biomass cooking stoves
>> Subject: Re: [Stoves] Ulaanbaatar Air Quality
>> 
>> Dear all,
>> 
>> We have developed coal briquette stove that can provide flame duration
up
>> to 14 hours, depending on the heating content of coals. The stove is
>> TLUD.
>> 
>> Please check the picture attached.
>> 
>> Regards
>> M. Nurhuda
>> 
>> 
>> On Fri, 8 Nov 2013 16:37:16 -0500, "Crispin Pemberton-Pigott"
>> <crispinpigott at gmail.com> wrote:
>> > Dear Teddy
>> > 
>> > 
>> > 
>> > Generally speaking the locally made ones are poorly designed, leaky
and
>> > have
>> > a power spectrum and controllability that meets the local demand. 
>> People
>> > also know how to use them.
>> > 
>> > 
>> > 
>> > In Ulaanbaatar the artisanal stoves last from 5 to 10 years but
highly
>> > variable. They are quite good wood stoves, for which the brick lining
>> > is
>> > removed.
>> > 
>> > 
>> > 
>> > If we could reliably get harder, smaller coal (size sorted) some
could
>> > operate for 12 hours without attention.
>> > 
>> > 
>> > 
>> > All the new (subsidized) ones are well made. They have to fix them
free
>> for
>> > the first two years under warranty and so on. Several run way too hot
>> > so
>> > they won't last 5 years. People generally want huge cooking and
heating
>> > power.
>> > 
>> > 
>> > 
>> > Regards
>> > 
>> > Crispin
>> > 
>> > 
>> > 
>> > 
>> > 
>> > Interesting discussion, sorry if this is a bit off the point but has
>> anyone
>> > done or heard of any new life cycle analysis research on the
>> manufacturing
>> > and distribution aspects of new stoves vis-a-vis the ones made in
brand
>> new
>> > in factories as opposed to the ones made by hand at a village level
>> > with
>> > recycled materials? 
>> > 
>> > 
>> > 
>> > What impacts of localized pollution does this have do you think? 
>> > 
>> > 
>> > 
>> > Teddy
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