I thought that it is best to heat the secondary air as much as possible, in that a tube could run through the firebox. with a couple of jets injecting air into the start of the vortex. yet principally the idea would be to heat all incoming air. the jets could be angled into the spin. injectors of this kind are used in wood gasifiers.
For what it is worth, the ceramic glass tops from discarded stove-ovens work very well as the top deck. Extracting them from the metal and rubber-ish gasket surrounds involves some nasty work with a grinder and organic filter mask... But they are very durable. I've burned multiple loads for hours at a stretch in a vortex and they hold up fine.
Scott says: The cooktops, when off the stove, have the large dob in each corner of the metal stove surround,accessible from the bottom side, this can be sliced through with a fillet knife at each corner from the underside, a utility knife can cut the seal all around the outside edge from the top side, and then a thin side pick or something to get it started to break free. Once it starts, only a edge clean up is required. No grinding or dust created.
that has several pictures and more thorough analysis.
I think the main observation about efficiency and burn characteristics is the idea that the "riser" is the horizontal upper batch box and as such I started to apply the other principles of the original rocket stove riser. Primarily that meant greater insulation to help the burn be more efficient. I was told there is some insulation in the stove glass top,but adding ceramic fiber on top of the stove top increased the temps there by a couple hundred degrees.
I also noticed that putting a pot on that hot surface could create a sooty place under some conditions which runs counter to the whole idea of a heat riser as a place where as much as possible heat is allowed to build and not deliberately extracted.
The 2018 stove had a second chamber where I tried to include an oven, so top temps were not as intense as they are on the 2019 build which substitutes a simple insulated bell under the second half of the glass top. Temps on this part of the cooktop are now plenty hot. I have measured them at 600 F when the top shoebox has ceramic fiber board on top as an insulator.
The front viewing glass of the top shoebox frequently tops 800F with this arrangement.
The other observation is about the door , and the pyrex and neoceram pot lids that have been used by many. My experience has not been good Perhaps my door opening wasn't molded right, perhaps it was too close to the working part of the bb, but those lids have all failed. I can't really blame the visions cookware as far as temperature stability, but manipulating those hot lids eventually has led to disasters.
I'm working on a design, and will elaborate more if it works, but even a neoceram glass pane will need a frame of some sort- eventually.
Post by permaculturebob on Dec 18, 2019 16:28:18 GMT -8
This is likely not the place to comment on cook top glass removal, but since I don't know how to rearrange posts I'll leave that to the experts. I recently used a propane torch along with various metal scrapers, utility knives and occasionally one of those multi tools. The saw blade on the multi tool saw blades seem to be at a perfect angle for getting down perfectly flat against the glass. So far it has been tedious at best, but I did think the torch made it a little easier.
Also, the braces and rubber putty on each cook top are different, although the glass is all about the same dimension, and while the tops are pretty rugged, I did break a corner off one at the very last minute after separating all the glue except for one spot on the corner. I thought it was small enough to pull free without cutting it--it wasn't--don't take any shortcuts.
Also I was pleasantly surprised that a diamond bladed wet tile saw cut the glass without incident--but keep a steady hand and go real slow
SUPER ce poele vitré ideale pour observer et gerer le comportement de la combustion. j'avais fait un poele similaire il y a quelque temps juste pour tester mais peu de moyen. Je recommence a bruler un peu de bois en quete de mon futur poele.
SUPER this ideal glass stove to observe and manage the behavior of combustion. I had made a similar stove some time ago just to test but little means. I start to burn a little wood in search of my future stove.
the flames are really blue I think it was a piece of railway oak that gave this blue color and such whiteness at the bottom of the chimney.
jlous, most people here are English speakers. If you cannot write in English please provide a google translation. Thanks.
jlous, la plupart des gens ici sont anglophones. Si vous ne pouvez pas écrire en anglais, veuillez fournir une traduction google. Merci.
TexasGonzo: Sooooo glad I found this site! Its always rewarding to find such a super group of folks! To any and all, feel free to PM me anytime. Thanks for having me!
Mar 11, 2019 18:56:41 GMT -8
jlmtech: GADGET: CONSIDER USING A JET PUMP INSTEAD OF A BLOWER FAN TO INDUCE DRAFT; NO CLOGGING.
Mar 26, 2019 8:19:28 GMT -8
michaelegan: i am unable to open the sketchup files on my mac. I used sketchup a few years back but apparently the company now requires a subscription. does anyone have any advice/instructions on how to use the program or how to view pictures without spending money?
Aug 20, 2019 18:41:48 GMT -8
mannytheseacow: michaelegan: download AutoCAD student version for free... import .SKP
Aug 23, 2019 13:33:44 GMT -8
topbaza: hi everyone, been searching all over net and this is were i need to be i think!!
Sept 28, 2019 6:16:25 GMT -8
anounaki: Hi, why I cant upload photos when I make new tread to this forum?
Feb 28, 2020 2:09:40 GMT -8
ahansen: photos under 1 mb not possible?
Jun 4, 2020 0:09:21 GMT -8
belgiangulch: Photo's are possible. They must be downloaded elsewhere and the image url (adress) is copyied.
Sept 14, 2020 7:26:15 GMT -8
belgiangulch: While creating a thread click on the small picture in the banner above the reply. A box pops up, paste the image url in the box. Pay no attention to the huge list of numbers and such.When you finish and hit reply your post with pictures will come up.
Sept 14, 2020 7:29:27 GMT -8
deadstarsstillburn: Hi there. I was directed this way by folks on the Permies.com website and am hoping I can get some information on how a total newbie can get started designing, siting, building, and not-dying-in-a-horrible-house-fire with a new RMH in a 160-year old home
Oct 21, 2020 6:52:10 GMT -8
deadstarsstillburn: The people over there recommended either a 6" batchbox or an 8" J-tube. I don't know what those are but am going to try to figure that out. What I need is a blueprint that I can scale to fit the need for my house. I have something likne 5000 square feet
Oct 21, 2020 6:53:00 GMT -8
deadstarsstillburn: but I do not need to heat all of it by any means. probably only need to heat half of that, maybe less.
Oct 21, 2020 6:53:15 GMT -8
deadstarsstillburn: moreover, the house has 3 storeys (large attic) so I assume if I get very efficient heating on the ground floor, that will go a long way toward heating the upstairs as well, no?
Oct 21, 2020 6:53:59 GMT -8
BenAlexanderT: Happy new year everybody. I wish you the best
Dec 31, 2020 15:06:14 GMT -8
Solomon: Anybody in Southern Oregon, in Jackson or Josephine counties?
Jan 16, 2021 21:54:43 GMT -8
gnomedome: i realsie this is from 2009
Apr 14, 2021 8:30:44 GMT -8
gnomedome: i realize this is from 2009 id love to see the photos from this ..as im looking to build a sauna soon similar to this .... if anyody sees this post email@example.com..... the photos in this post did not show up
Apr 14, 2021 8:32:00 GMT -8