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<pre><span style="mso-ansi-language:EN-US" lang="EN-US">Dear Crispin, Julien, A.D. Karve and list,<o:p></o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US"><o:p> </o:p></span></pre>
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Roman";color:windowtext;mso-ansi-language:
EN-US;mso-fareast-language:DE" lang="EN-US">The
VITA-ITGD-publication linked by Julien (“Wood
Conserving Cook Stoves”) announces on page iii, that </span></p>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US">“A second volume of this book is planned. It will focus on how to introduce stoves through small-scale local programs, taking into account the social and cultural aspects of stove design. It will also include information on testing stoves.” This publication may be the GTZ-Aprovecho-book “Helping People in Poor Countries Develop Fuel-Saving Cookstoves”. <o:p></o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US"><o:p> </o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US">The intention of my short calculations on fuel consumption for cooking (Topic 12, Vol.45/11) was to show that the burden of firewood on the head of the woman, as shown on the cover page of the VITA-ITGD-publication can be reduced to quite nothing. Essential for this are measures to increase the efficiency of the stove to more than 30%, but also to use the fireless cooking technology, i.e thermos-technology, heat retaining technology. (This technique of course is also essential for reducing the fuel consumption for space heating). I have not seen a reference to this totally clean an appropriate technique in these publications. <o:p></o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US"><o:p> </o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US">To visualize the amount of firewood which could have been saved all the years, one can assume that it is approximately half of the whole non-renewably burnt firewood: saved with a technology which our parents resp. grandparents have used and which should be part of the school teaching. <o:p></o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US"><o:p> </o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US">With kind regards,<o:p></o:p></span></pre>
<pre><span style="mso-ansi-language:EN-US" lang="EN-US">Dieter<o:p></o:p></span></pre>
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Am 12.05.2014 14:49, schrieb Crispin Pemberton-Pigott:<br>
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<pre wrap="">Dear Julien
I remember in Grade 2 a classmate was burned out of his house by a chimney fire in a wood-heated house. They lost literally everything.
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<pre wrap="">--- or the technology keeps on being invented and forgotten, because I'll bet the Romans were no fools with fire.
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The made TLUD fires and hypocausts (underfloor heating) and I have heard once that they build what are called Mass Rocket Stoves or mass rocket heaters or some such name. They have a rising hot, insulated column coming from the fire, then an external barrel of metal over that so the smoke descends, heating the room. There is a group still working under Ianto Evans building them in Oregon. They have a website. Ianto’s 1979 book on Lorena construction (originally from Aprovecho) is mentioned in the VITA book on p.113.
The group that built and promoted Lorena’s went into Cob House building and some are still at it on the West Coast. There is a popular stove-powered brick bed heating stove system used in China. The Rocket Mass Heater works like that. There is at least one in Ulaanbaatar.
Regards
Crispin
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