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Post by uruguay on Aug 18, 2015 6:42:28 GMT -8
I live in Uruguay in south América so mi english is not the best. Mi quetion is if i do a higher rise heater y would be able to make a larger bench? Or how is it calculated? Why not doing it larger? Ver thank you peter. There ia nothing in spanish about it and i am loving this stoves.
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Post by patamos on Aug 19, 2015 9:28:34 GMT -8
A well insulated taller riser may give more push of gas flow. So also will a taller well insulated chimney stack give more pull of gas flow. But you still want the gasses to spend an ideal amount of time giving heat inside the bench bells or flue runs...
Making a much taller riser might rob some of the early heat that could be going to a cook top or water heater. It might also make for design difficulties if the bench is on the same level as your fire chamber.
There are many other factors to consider. Just thought i'd add a few thoughts.
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Post by uruguay on Aug 21, 2015 19:06:35 GMT -8
Thanks , I wonder then if the length of the chimney mentioned in peter´s table is the shortest with which would work well the batch box? or in what changes wood make doin a shorter one or a larger one??
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Post by satamax on Aug 22, 2015 1:41:50 GMT -8
Shorter "heat riser" makes the wood gases burn uncompletely and lessens the draft. Longer one adds draft. It is possible to use a slightly shorter one, may be 10/20%, but you will have soot. And then you realy need a tall chimney after the "stove" to gain the draft lost by the short heat riser.
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Post by uruguay on Aug 24, 2015 9:57:51 GMT -8
Thank you. But my question is if i put a higher heat riser i would be able to put a larger acumulation bench?? Or there is any problem? My thought is putting a higher heat riser a larger bench so i would have efficienty near 100%... If someone can help mi why nobody uses this? Really thankyou
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Post by satamax on Aug 24, 2015 11:07:07 GMT -8
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Post by uruguay on Aug 24, 2015 11:13:52 GMT -8
sorry y dont see where is the answer. You can copy it to me because mi lenguage is spanish and i am doing mi best effort to comunicate jaja
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Post by satamax on Aug 24, 2015 11:36:42 GMT -8
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Post by peterberg on Aug 24, 2015 12:19:51 GMT -8
On the subject of speaking Spanish: have you found this thread? linkhttp://donkey32.proboards.com/thread/1605/batch-box-built-on-januaryI think it is not sensible to try an overly long bench with a higher riser. The higher riser inevitably need more barrel over it which will extract more heat. You always run the risk of making the bench too long, ending up with a heater that doesn't draw enough to keep the rocket going. Keep in mind, the working of this type of burners depends on high velocity draft. So you do need an adequate chimney stack and at least 60 degrees Celsius at the end of that in order to avoid condensation in the chimney. Extracting too much heat will lead to less efficient burning so you wouldn't gain anything.
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Post by uruguay on Aug 27, 2015 15:50:48 GMT -8
On the subject of speaking Spanish: have you found this thread? linkhttp://donkey32.proboards.com/thread/1605/batch-box-built-on-januaryI think it is not sensible to try an overly long bench with a higher riser. The higher riser inevitably need more barrel over it which will extract more heat. You always run the risk of making the bench too long, ending up with a heater that doesn't draw enough to keep the rocket going. Keep in mind, the working of this type of burners depends on high velocity draft. So you do need an adequate chimney stack and at least 60 degrees Celsius at the end of that in order to avoid condensation in the chimney. Extracting too much heat will lead to less efficient burning so you wouldn't gain anything. Thank you for your answer. Some questions i still hace are. 1) Why you say 60 degrees and not 100 in order to avoid condensation in the chimney? 2) what do you think about sided batch box Adiel Shnior have some stoves made? they are the same ? in efficienty and combustion quality? what do you think? Thank you so much
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Post by peterberg on Aug 28, 2015 1:09:35 GMT -8
1) In most circumstances, condensation point of the exhaust gases in the chimney are in the region of 40 to 50 Celsius. So 60 C would be enough to avoid condensation. That is, at first there will be some water but this will evaporate again when later in the burn the temperature is rising. 2) The sided riser or "sidewinder" will work. It's too early to tell whether they are the same because no Testo analizer hes been near those yet.
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Post by uruguay on Aug 29, 2015 12:30:31 GMT -8
1) In most circumstances, condensation point of the exhaust gases in the chimney are in the region of 40 to 50 Celsius. So 60 C would be enough to avoid condensation. That is, at first there will be some water but this will evaporate again when later in the burn the temperature is rising. 2) The sided riser or "sidewinder" will work. It's too early to tell whether they are the same because no Testo analizer hes been near those yet. Oh right. And how much of the heat produced is trasmited to the house in the barrrel? How much %?. Because i think 1kg of wood is producing 14000btu so if i know those things y would know how much wood i need because mi house is no so big and i dont know if y can maie the bench. Thanj you
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Post by satamax on Aug 30, 2015 0:03:39 GMT -8
Uruguay, if you have a problem fitting the bench in your house, use a bell.
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Post by patamos on Aug 30, 2015 7:53:11 GMT -8
you can also make a small bench bell with the backrest as a second bell see the recent pics on 'vortex stove'
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Post by uruguay on Aug 30, 2015 14:01:44 GMT -8
Oh right. And how much of the heat produced is trasmited to the house in the barrrel? How much %?. Because i think 1kg of wood is producing 14000btu so if i know those things y would know how much wood i need because mi house is no so big and i dont know if y can maie the bench. Thanj you
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