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Post by peterberg on Apr 29, 2014 11:53:29 GMT -8
OK then, it's the cooktop! This will be cooled by the air and the pots on top of it so this will last longer. Regarding the top gap, the man in the Hautes Fagnes left 15 cm between the riser and the cook top. Maybe you could do with a slightly smaller figure but you have maintain sufficient csa throughout the stove. Every 90 degree corner which the gases need to go should preferably be 150% of system size.
As far as I know, the p-channel feed can come from every angle so the shaker hole should be fine.
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Post by satamax on Apr 29, 2014 12:32:11 GMT -8
OK then, it's the cooktop! This will be cooled by the air and the pots on top of it so this will last longer. Regarding the top gap, the man in the Hautes Fagnes left 15 cm between the riser and the cook top. Maybe you could do with a slightly smaller figure but you have maintain sufficient csa throughout the stove. Every 90 degree corner which the gases need to go should preferably be 150% of system size.
As far as I know, the p-channel feed can come from every angle so the shaker hole should be fine.Perfect Peter, that nice to hear. As far as gap goes, i usualy prefer to go a smidge bigger than required, and i don't want a hot spot! Calcs say 3cm absolute minimum top gap. so i'll aim for 5 and i'll be ok!  |
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Post by satamax on Apr 30, 2014 12:48:31 GMT -8
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Post by satamax on May 1, 2014 7:52:15 GMT -8
May be some of you might be intrested by the first "try"
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Post by matthewwalker on May 1, 2014 11:16:25 GMT -8
Looks great Max!
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Post by satamax on May 1, 2014 11:33:53 GMT -8
Can't wait to stuff wood in it, but it was may the first bank holliday over here, and everything was blady shut, so i couln't get the refractory joint cement i need to finish holding the perlite down, and the few other bits and bobs needed to reassemble! |
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Post by Dan (Upstate NY, USA) on May 1, 2014 16:29:38 GMT -8
Wow that looks great, can't wait to see more...
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Post by satamax on May 1, 2014 22:54:32 GMT -8
Thanks Wolf!
Peter, if you read this, regarding the door air opening, should it be 20% of riser CSA or 20% of port size?
Thanks.
Max.
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Post by peterberg on May 2, 2014 0:10:34 GMT -8
Peter, if you read this, regarding the door air opening, should it be 20% of riser CSA or 20% of port size? Main air inlet should be adequate at 20% riser csa, i.e. system size. P-channel 5% system size or as close as practical. |
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Post by satamax on May 2, 2014 3:38:59 GMT -8
Peter, if you read this, regarding the door air opening, should it be 20% of riser CSA or 20% of port size? Main air inlet should be adequate at 20% riser csa, i.e. system size. P-channel 5% system size or as close as practical. Thanks a lot Peter. Well, my system is weird! Because my "firebox" was about the right size for a 10cm, i did the port and P channel in relation to that, despite my heat riser being 12cm, and a smidge short for a 10cm. The hole in the door is 5x6.5 cm so 32,5cm² If i take the 12cm measurement, i get 113cm² csa. So 20% of that is 22.6cm² so the 32 is plenty good enough. By the way, about the P channel, have you seen how well it draws in the video above? |
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Post by peterberg on May 2, 2014 5:34:45 GMT -8
By the way, about the P channel, have you seen how well it draws in the video above? Yes, I've seen that. Now and then some people will come along and ask why there isn't emitting any smoke from that hole. But there never is, unless I am experiencing a chimney stall. About the numbers, this is tricky. I honestly don't know whether you have to use the riser as the system size or the firebox. My bet would be the riser, in that case the firebox is a bit cramped. But the only thing you can do at the moment is to go ahead, and see how well it works. |
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Post by satamax on May 2, 2014 5:44:04 GMT -8
By the way, about the P channel, have you seen how well it draws in the video above? Yes, I've seen that. Now and then some people will come along and ask why there isn't emitting any smoke from that hole. But there never is, unless I am experiencing a chimney stall. About the numbers, this is tricky.
I honestly don't know whether you have to use the riser as the system size or the firebox. My bet would be the riser, in that case the firebox is a bit cramped.Well Peter, if i'm not too daft, you said in a previous post somewhere on the batch boxes, that the port should be about 65 to 70% of system size There i'm at spot on 70% or 55cm² for a ten cm. and a 50% for the 12cm heat riser. But since the bricks are reducing the csa behind the port, it will have to do |
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Post by peterberg on May 2, 2014 5:54:45 GMT -8
Max,
It was just a wild guess on my part. But go on, build the stove and run it please, I am very curious.
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Post by satamax on May 2, 2014 9:34:09 GMT -8
Up and running!
I need to drill more holes in the door it chokes it too much.
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Post by satamax on May 4, 2014 5:56:03 GMT -8
I cleaned the top and did an atempt yesterday!  New hole in the door, seems to do the job and not choke it.  Bit of cooking a duck breast on the range top.  And i tried the taters in the water tank. To no avail. So they went onto the bricks directly under the left ring. And ended up slightly burned for one of thoses. |
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