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Post by metalmole on Nov 17, 2013 16:17:37 GMT -8
Thanks Max and Peter, Max I can't open your file, I will see what I can do about that, I am thinking I will build the batch box from fire brick and refractory cement, also using the fire brick and refractory to build the lower part of the heat riser- If the bottom of the heat riser needs to be rounded I can use either fire brick cut at angles to line the bottom corners...Is there a measurement of the width of the gate, and does that measurement depend on the fire box size ??
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Post by satamax on Nov 17, 2013 23:51:24 GMT -8
When you say the gate, you mean the port at the end of the firebox? Peter has given the measurements. 65 to 70% system size (heat riser csa) One thing tho. Use a narrow and tall port. Peter will correct what i'm saying accordingly. But on mine, which has aproximately thoses dimensions, my port is too wide may be 6 or 7cm and too low compared to the ceilling of the firebox, and this generates a little smokeback. The file is made under sketchup 13. If you don't have the latest version, it won't open. I was kind of trying to figure the costs. In euros, 70 in insulating firebricks. That is shipping included. And about 125 of steel. Let say 30 of clay chimney flues. If that where i am. 25 for a bag of 100L of vermiculite. So with tubes to reach the chimney, you have 300 euros in materials. Might also be in the 300 dolls range, cos things are cheaper in the us i think. Peter, if you pop around. I've just checked. Superwool prices are real expensive. Better use perlite ir vermiculite if space is not tight, i think. Mind you, i have a question, doesn't it degrade with the moisture in the exhaust gasses? On a side note. Here's what gave me the idea of the big metal bell.  Home heating fuel or tractor fuel tanks. Talk about cheap secondhand things to recycle. |
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Post by metalmole on Nov 18, 2013 17:58:53 GMT -8
yea im talking about the port at the end of the fire box....another question, is it important that the fire box not be too long ??, I will be burning oak that's around 40 cm long.... Hey Max thanks for the pricing, I have some of the stuff I need, don't have to buy any steel, I have some refractory cement too...
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Post by satamax on Nov 18, 2013 23:13:10 GMT -8
yea im talking about the port at the end of the fire box....another question, is it important that the fire box not be too long ??, I will be burning oak that's around 40 cm long.... Hey Max thanks for the pricing, I have some of the stuff I need, don't have to buy any steel, I have some refractory cement too... A batch box rocket is actually a tunnel. The ratios between the firebox width and height on one hand and the firebox and gate on the other are fairly critical. Lengthening of the firebox can be done without much ill effect. When the batch box is properly made, running it is very easy. It is capable of devouring much larger woud as compared to the J-tube. Don't know much about pocket rockets, never built one. |
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Post by ringoism on Dec 9, 2013 9:34:55 GMT -8
Superwool prices are real expensive. Better use perlite ir vermiculite if space is not tight, i think. Mind you, i have a question, doesn't it degrade with the moisture in the exhaust gasses? Just FYI: There's an apparently equivalent product to Superwool manufactured here in India by Lloyd Insulations, known as Supercera. Good to 1260C or 1400+C, depending on grade. They've got boards, ropes, and shapes, etc, too. I got a big roll of the blanket in New Delhi, I guess around 25ft x 2ft, 1" thick, for INR800 / under $15 U.S. I'm guessing they probably export... albeit likely at a price hike vs. the subcontinent. They've got a website: lloydinsulations.com for anyone interested. -Eric |
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Post by satamax on Dec 9, 2013 14:33:04 GMT -8
Thanks a lot Ringoism.
But supercera is a ceramic fiber blanket. And is not suposed to be sold to non proffessionals in euroland, since it's not biosoluble. So, even if it passes through the customs, it wouldn't be well regarded if someone noticed. And there's always health hazards!
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