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<p class="MsoNormal" style="background:white">Dear Friends<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><o:p> </o:p></p>
<p class="MsoNormal" style="background:white">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:<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><o:p> </o:p></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
Shortening of the heat exchanger to meet the local demand caused by very constricted space in side a ger (yurt)<o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
Large cooking hole (36 cm) to accommodate woks up to 62 cm in diameter<o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
Cast iron grate <o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
New heat exchanger layout to bring more heat to the front of the stove, on each side<o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
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<o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
Retains the hot gas ‘bleeder’ incorporated into the Model TJ2, KG2.5 and KG5.2 stoves the latter being a low pressure boiler)<o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
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.<o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
The appearance is very conventional on the outside<o:p></o:p></li><li class="MsoNormal" style="margin-left:0cm;mso-list:l1 level1 lfo3;background:white">
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.<o:p></o:p></li></ul>
<p class="MsoNormal" style="background:white"><o:p> </o:p></p>
<p class="MsoNormal" style="background:white">Things to ignore: <o:p></o:p></p>
<p class="MsoNormal" style="background:white">The text of the cutting list is incomplete.<o:p></o:p></p>
<p class="MsoNormal" style="background:white">There is only one inner ring, mostly for saving time to make it. A cast iron set is usually 3 parts, not 2.<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><o:p> </o:p></p>
<p class="MsoNormal" style="background:white">Linings:<o:p></o:p></p>
<p class="MsoNormal" style="background:white">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.<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><o:p> </o:p></p>
<p class="MsoNormal" style="background:white">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.
<o:p></o:p></p>
<p class="MsoNormal" style="background:white"><span style="font-size:8.0pt;font-family:"Garamond",serif;color:black;mso-fareast-language:EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Coking:<o:p></o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The estimated selling price is $150. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="227" height="280" style="width:2.3666in;height:2.9166in" id="Picture_x0020_1" src="cid:image001.jpg@01D321A6.95356AB0" alt="cid:image002.jpg@01D321A5.E3D76160"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">High power pefromance<o:p></o:p></p>
<p class="MsoNormal"><img width="189" height="318" style="width:1.9666in;height:3.3083in" id="Picture_x0020_2" src="cid:image003.jpg@01D321A6.95356AB0" alt="cid:image007.jpg@01D321A5.E3D76160"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The top surface is very hot.<o:p></o:p></p>
<p class="MsoNormal"><img width="189" height="278" style="width:1.9666in;height:2.8916in" id="Picture_x0020_3" src="cid:image004.jpg@01D321A6.95356AB0" alt="cid:image008.jpg@01D321A5.E3D76160"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The stove with the hopper lid off:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="265" height="370" style="width:2.7583in;height:3.8583in" id="Picture_x0020_4" src="cid:image005.jpg@01D321A6.95356AB0" alt="cid:image009.jpg@01D321A5.E3D76160"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards<o:p></o:p></p>
<p class="MsoNormal">Crispin<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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