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<div style="width:100%; font-size:initial; font-family:Calibri,'Slate Pro',sans-serif,sans-serif; color:rgb(31,73,125); text-align:initial; background-color:rgb(255,255,255)">
Dear Philip</div>
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<span style="font-size:initial; text-align:initial; line-height:initial">I received a report from Ulan this morning. They said the average is 0.03%. The heating efficiency is in the high 80's. </span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial"><br>
</span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial">Not 30 minutes ago we lit the first MN4.01 made with plastic refractory ceramic plates instead of bricks. It is going very well. The fire was lit, and fuel filled after 12 minutes. It
is not 25 minutes from ignition and the CO/(CO+CO2) is 0.055%. The undiluted PM2.5 is 1.34 mg/m^3 (O2=0%).</span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial"><br>
</span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial">Full ignition of the pyrolysis zone under the whole hopper will take about 45 minutes. At that time, with a 'fully developed fire' the Excess Air will be about 75% which is right on target.
Ulan reported 77%. </span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial"><br>
</span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial">He is burning Kara-Keche bituminous coal and we are burning a wet lignite from Baganuur. The K-K has about twice the energy per kg. </span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial">The hopper load here is seven kg. </span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial">Regards</span></div>
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<span style="font-size:initial; text-align:initial; line-height:initial">Crispin </span>
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<p class="MsoNormal"><span style="color:#1F497D">Dear Crispin</span></p>
<p class="MsoNormal"><span style="color:#1F497D">What is the efficiency measure? CO/(CO+CO2)?</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Philip</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> Stoves [mailto:stoves-bounces@lists.bioenergylists.org]
<b>On Behalf Of </b>Ulan CAMP<br>
<b>Sent:</b> Thursday, September 7, 2017 5:47 AM<br>
<b>To:</b> 'Crispin Pemberton-Pigott'; 'Stoves'<br>
<b>Cc:</b> 'Ìóðàò'; 'Marius Fischer'<br>
<b>Subject:</b> Re: [Stoves] Mongolian Model 4, based on the Kyrgyzstan stove, drawings now available</span></p>
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<p class="MsoNormal"> </p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Dear Crispin,</span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">This week we have tested Mongolian Model 4 with new bridge, based on your original drawings. Also we added 3 lines of brick around hoper inside of the stove in order to prevent coal from roasting.
Those minor improvements made a positive changes on stove operating. </span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">There is a report attached with our observations and measurements. </span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">best regards, </span>
</p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Ulan </span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span lang="EN-US" style="color:#1F497D"> </span></a></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> Crispin Pemberton-Pigott [<a href="mailto:crispinpigott@outlook.com">mailto:crispinpigott@outlook.com</a>]
<br>
<b>Sent:</b> Wednesday, August 30, 2017 3</span><span lang="RU">:43 PM<br>
<b>To:</b> 'Stoves (<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>)' <<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>><br>
<b>Subject:</b> Mongolian Model 4, based on the Kyrgyzstan stove, drawings now available</span></p>
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<p class="MsoNormal"><span lang="RU"> </span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">Dear Friends</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA"> </span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">There is a new set of drawings for the Mongolian Model 4, a localised version of the KG4.x stoves that were so successful last winter. The localisation involves:</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA"> </span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">Shortening of the heat exchanger to meet the local demand caused by very constricted space in side a ger (yurt)</span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">Large cooking hole (36 cm) to accommodate woks up to 62 cm in diameter</span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">Cast iron grate </span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">New heat exchanger layout to bring more heat to the front of the stove, on each side</span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">A down-drafting heat exchanger gas flow that utilises buoyancy to create a thermally stratified profile, hottest at the top and coldest at the bottom</span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">Retains the hot gas ‘bleeder’ incorporated into the Model TJ2, KG2.5 and KG5.2 stoves the latter being a low pressure boiler)</span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">The photos show the top being made of 6mm steel plate but the drawings are provided for a cast iron top which is on it way to production.</span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">The appearance is very conventional on the outside</span></p>
<p class="MsoNormal" style="margin-left:36.0pt; text-indent:-18.0pt; background:white">
<span lang="EN-CA">-</span><span lang="EN-CA" style="font-size:7.0pt; font-family:"Times New Roman","serif"">
</span><span lang="EN-CA">There is a heating function bypass allowing the stove to be used in summer for cooking while not heating the kitchen much. That is the lever at the back corner.</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA"> </span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">Things to ignore:
</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">The text of the cutting list is incomplete.</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">There is only one inner ring, mostly for saving time to make it. A cast iron set is usually 3 parts, not 2.</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA"> </span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">Linings:</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">The stove was designed to be assembled using plastic refractory plates 40mm thick, but as we built the prototype lined with refractory bricks, both solutions are included. All the moulds are shown
for making the plates including inserts to create bevels. If you have trouble understanding how the inserts work, contact me.</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA"> </span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA">Testing the stove with Kara-Keche coal the firepower peaked at about 20 kW which is well above the designed operating power of 12 kW.
</span></p>
<p class="MsoNormal" style="background:white"><span lang="EN-CA" style="font-size:8.0pt; font-family:"Garamond","serif"; color:black"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">We have multiple reports of people burning corn cobs, wood and a variety of biomass in the stove. I have no advice on how to do that. I tested it with 8mm wood pellets and it has uncontrollably high power. It would need
modification in the lower hopper to limit the power to 12 kW.</span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">Coking:</span></p>
<p class="MsoNormal"><span lang="EN-CA">We boiled about 7 litres in water at a rate of 5.5 minutes per litre. That is reasonable for a cooking stove, but very good for a space heating stove. The cooking power is very controllable. In general there is no need
to ‘do something’ to the grate or fuel to ramp cooking power up and down. Just slide the air controller.</span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">The estimated selling price is $150. </span>
</p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">This combustor, a crossdraft gasifier, makes extremely little smoke. Here is a photo of the top of the stove chimney (at full power) with the Bishkek power station chimney in the background. Both are burning Kara-Keche
coal.</span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA"><img border="0" width="227" height="280" id="Picture_x0020_1" src="cid:image001.jpg@01D327CA.B1846FC0" alt="cid:image002.jpg@01D321A5.E3D76160"></span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">High power pefromance</span></p>
<p class="MsoNormal"><span lang="EN-CA"><img border="0" width="189" height="318" id="Picture_x0020_2" src="cid:image003.jpg@01D327CA.B1846FC0" alt="cid:image007.jpg@01D321A5.E3D76160"></span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">The top surface is very hot.</span></p>
<p class="MsoNormal"><span lang="EN-CA"><img border="0" width="189" height="278" id="Picture_x0020_3" src="cid:image004.jpg@01D327CA.B1846FC0" alt="cid:image008.jpg@01D321A5.E3D76160"></span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">The stove with the hopper lid off:</span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA"><img border="0" width="265" height="370" id="Picture_x0020_4" src="cid:image005.jpg@01D327CA.B1846FC0" alt="cid:image009.jpg@01D321A5.E3D76160"></span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA">Regards</span></p>
<p class="MsoNormal"><span lang="EN-CA">Crispin</span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
<p class="MsoNormal"><span lang="EN-CA"> </span></p>
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