Dear Rhiya hi,<div><br></div><div>I work for Prakti Design, based here in Nepal. We're commercially selling a range of wood burning stoves, and also more specialised briquette burners too. Dung briquettes, including the washing and briquette preparation is something that we are looking at, following on from work done together with Sarbagya (Tuladhar) and EWB Oz.</div>
<div>Please do drop me a line when you visit Nepal, our office is based in Pokhara.<br clear="all"><div><br></div><div>Marco</div><div><br></div><a href="mailto:marco@praktidesign.com">marco@praktidesign.com</a></div><div>
<br></div><div><br>
<br><br><div class="gmail_quote">On 21 October 2012 18:09, <span dir="ltr"><<a href="mailto:stoves-request@lists.bioenergylists.org" target="_blank">stoves-request@lists.bioenergylists.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Today's Topics:<br>
<br>
1. Re: Vietnamese brick kilns (Crispin Pemberton-Pigott)<br>
2. Re: Watson Fellowship - Looking for Suggestions<br>
(Sarbagya Tuladhar)<br>
3. Re: Vietnamese brick kilns (Crispin Pemberton-Pigott)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Sun, 21 Oct 2012 18:34:27 +0700<br>
From: "Crispin Pemberton-Pigott" <<a href="mailto:crispinpigott@gmail.com">crispinpigott@gmail.com</a>><br>
To: "Stoves" <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Subject: Re: [Stoves] Vietnamese brick kilns<br>
Message-ID: <01ea01cdaf80$0d8ea7e0$28abf7a0$@<a href="http://gmail.com" target="_blank">gmail.com</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Dear Marc<br>
<br>
<br>
<br>
Your post was a 'keeper'. Thanks so much. You are doing very good work with<br>
nearly nothing backing you.<br>
<br>
"What I think is responsible is that the particular chemical structure of<br>
rice hull (high ash, a silica skeleton) acts as a brake on the "char<br>
reactions" ."<br>
<br>
I suspect it is worth looking at the ash and char content to see if there is<br>
not a mistake being made relative to the application of the Siegert<br>
constants. That will affect the final number and are rooted in the chemical<br>
composition of the fuel, which has of course changed.<br>
<br>
<br>
<br>
I believe we will one day be able to compensate for this in real time by<br>
using a sum of the gases emitted. So far, just feeling for a way in the<br>
almost-dark. Thanks for identifying the discrepancy and let's keep looking<br>
for the reason. You can at least guess Siegert constants for the char based<br>
on a guess at its chemical composition and report the difference it makes in<br>
the final calculation. If it is greater than your measurement errors we have<br>
something significant to talk about.<br>
<br>
<br>
<br>
I have been having a very interesting time in Java talking to people using<br>
stoves for 'industrial' purposes. We are going to have to redefine what<br>
'domestic' stoves are! Rice hull is a widely available fuel and I have yet<br>
to see a decent burner for them locally save a photo of an exact knock-off<br>
of Roger Samson's Mayon Turbo Stove.<br>
<br>
<br>
<br>
Here, in reply, is a simple test result for thermal efficiency on something<br>
made locally. It shows how the thermal efficiency varies systematically with<br>
power giving a policy manager valuable information about how it performs in<br>
different circumstances. This was for one pot size only (large). Different<br>
pots (and woks) yield different profiles and efficiencies at the same power.<br>
<br>
<br>
<br>
<br>
<br>
The trend line is for both water heating and boiling.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
The instantaneous efficiency values are provided for entertainment purposes<br>
and are jumping around due to the (im)precision of the scale. The overall<br>
efficiency of 23.0% is based on the overall mass measurement which is quite<br>
precise (1 part in 450) so it meets (that part of) the IWA precision<br>
requirement for Tier performance claims. The two charts are extracted from<br>
the same set of data.<br>
<br>
<br>
<br>
I wondered if the thermal efficiency was related to the water temperature<br>
but have not corrected these thermal efficiency numbers for the power level<br>
at the time. Here it is anyway:<br>
<br>
<br>
<br>
<br>
<br>
The trend is for the heating portion only. It is too shaky to make a claim,<br>
I want to see the power-corrected plot.<br>
<br>
<br>
<br>
Regards<br>
<br>
Crispin<br>
<br>
<br>
<br>
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<br>
Message: 2<br>
Date: Sun, 21 Oct 2012 23:09:57 +1100<br>
From: Sarbagya Tuladhar <<a href="mailto:sarbagya007@gmail.com">sarbagya007@gmail.com</a>><br>
To: Discussion of biomass cooking stoves<br>
<<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Cc: "<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>"<br>
<<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Subject: Re: [Stoves] Watson Fellowship - Looking for Suggestions<br>
Message-ID: <<a href="mailto:4BA78ABB-D6F6-4BEF-A677-9D6F9EF19A81@gmail.com">4BA78ABB-D6F6-4BEF-A677-9D6F9EF19A81@gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Hi Rhiya,<br>
<br>
Good on ya and wish u all the best on your travels. I was involved with the Engineers without borders australia as a stove design engineer working on a clean dung burning stove and did manage to get a first prototype to burning dung as a fuel in an improved cookstove. My design considered the characteristics of dung as compared to the fuel wood and hence was modified accordingly. Use of low grade fuel in Nepal is predominant in the southern parts of Nepal and hence it would help you to have a look around that region. I suppose you would more of divide your time between Kathmandu and the other regions. I would like to recommend you to Marco Peter who is working with the Prakti stoves in Nepal and is currently in pokhara. He would be your best contact person in Nepal regarding stove work although there are numerous governmental n non governmental cookstove affiliated organisations throughout the country.<br>
<br>
Cheers<br>
<br>
Sarbagya Tuladhar<br>
Sydney<br>
Australia<br>
<br>
Sent from my iPhone<br>
<br>
On 21/10/2012, at 6:23 PM, Rhiya Trivedi <<a href="mailto:rhiyatrivedi@gmail.com">rhiyatrivedi@gmail.com</a>> wrote:<br>
<br>
> Hi all,<br>
><br>
> My name is Rhiya Trivedi - I got access to this group from Cecil Cook, I hope you don?t mind. I am a 2012-2013 Thomas J. Watson Fellow, which means I have funding for twelve months to travel the world and investigate any topic of my choice. My funded topic deals specifically with efficient stove distribution and construction as a climate change solution for communities historically disempowered by climate change rhetoric.<br>
><br>
> I was a very involved climate activist for five years in the American, Canadian, and international climate change movements but was obviously dismayed by the extent to which Northern powers entirely dominate and oppress Southern, vulnerable nations within multilateral negotiations. Recent climate science on the impact of cooking fires and black carbon on short term climate change offers some remedy to this unequal power dynamic; developing countries have some agency over the climate and I?m out to see whether stove deployment is at all possible on the scale necessary in the time afforded us by the climate (in the absence of action from the world largest carbon emitters).<br>
><br>
> I?m coming from Malawi where I?ve split my time between two major stove efforts, one of which was specifically working to mitigate black carbon and one which was not. In South Africa I?m hoping to visit as many stove projects as possible and volunteer if at all possible (I?ve found throughout my life that lending a hand is the best way to understand the ins and outs of a project). I'll be spending 7 months with stove projects in India and Nepal come January.<br>
><br>
> So mainly I?m looking for projects anywhere in South Africa (or Swaziland or Lesotho) that are contributing to might allow me to come and pick their brains for some time (I?m not doing formal research so my needs are very low - I just want to be able to chat with implementers and target communities as freely as possible). I?m completely flexible between mid-November and December 31st to come and visit, and quite possibly before that if those dates don't work.<br>
><br>
> My CV is attached if that is at all of interest. I look forward to hearing from any of you at your earliest convenience.<br>
><br>
> Warm regards for a cooler planet,<br>
><br>
> Rhiya<br>
><br>
> <Trivedi.Resume.pdf><br>
> _______________________________________________<br>
> Stoves mailing list<br>
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------------------------------<br>
<br>
Message: 3<br>
Date: Sun, 21 Oct 2012 19:24:32 +0700<br>
From: "Crispin Pemberton-Pigott" <<a href="mailto:crispinpigott@gmail.com">crispinpigott@gmail.com</a>><br>
To: "Stoves" <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
Subject: Re: [Stoves] Vietnamese brick kilns<br>
Message-ID: <01f001cdaf87$080bcfd0$18236f70$@<a href="http://gmail.com" target="_blank">gmail.com</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Dear All<br>
<br>
This relates to the graphs posted earlier. Here is a firepower-corrected<br>
thermal efficiency v.s. water temperature plot. The correction is linear so<br>
don't read too much into it. It is still interesting to see.<br>
<br>
Regards<br>
<br>
Crispin<br>
<br>
<br>
<br>
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End of Stoves Digest, Vol 26, Issue 32<br>
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</blockquote></div><br></div>