Post by matthewwalker on Mar 31, 2015 14:10:41 GMT -8
Here's what I've been doing for the last few months....
It's based around a core that utilizes my air settings developed over burning in my home batch this winter. I've been speculating on how the lower velocity should allow the removal of the riser. After my visit with Max and Lasse and the crew from Firespeaking this winter, I came home super inspired to follow through with this and try to finalize a design to fit their Cabin Stove 2.0 format. I'm putting the info up on my Walker Stoves site, here it is....
I'm super excited to share this core with you guys, hopefully someone will cobble one together here so we can compare notes. I've been living with it for a month or so now as my cook stove and it's really a wonderful heater!
Dang it, matthewwalker! That is totally freakin beautiful!!! No wonder you've been hit or miss lately! WOW, WOW, WOW! No door? Or I'm missing something? Man, I love that stove. Great job, Matt... Are ya pickin up what I'm laying down?! Eric VW
Nice work Matt! H'm, that's got me thinking, wonder how much optional mass (bench or bell) it could drive? My interested is in building a dual purpose heating/cooking barrel-less RMH, with at least a two pot cook surface positioned at convenient height, to heat about 900 square feet.
Very nice metal work for the stove top also. Looks like ceramic glass cook surface on the left hand side.
Post by matthewwalker on Apr 1, 2015 14:22:52 GMT -8
Yes, ceramic glass cook top on the cook side, and I will have one over the oven as well once I come across another. I paid $5 for the one I have, they work amazingly well.
I'd be really excited to see any of you guys give this one a try in a heater build. This core opens up so many options for barrel less and low height builds. Bryon, I expect it can push about the same as a PvdB batch. Both are susceptible to low draft, but as long as there is good pull from the chimney they can drive a lot of mass. Right now, the thing is way under loaded. I may remedy that this summer with a bell/bench, or maybe not.
matthewwalker, I'm still in awe! What a beauty. It be nice to try one out, but heck I still haven't built my morticcio style batch yet ... So for anyone else thinking of accepting your "challenge" is the Sketchup available? Incredible piece of functioning art! You... are... the Man, Matt! Eric VW
Post by matthewwalker on Apr 1, 2015 14:44:36 GMT -8
I don't do sketchup, I'd rather just build the thing and see it burn rather than speculate. Now that I think about it though, it would be a good way to share it with you all who do. If anyone wants to take a crack at mocking up those layers I'd be happy to give dimensions as we go.
Here's the core layout for those of you who missed it:
Post by photoman290 on Apr 1, 2015 15:51:41 GMT -8
great design matt. trying to figure if i could fit one into the yurt rather than a drum design. i like the low height, the limiting thing in the yurt. i wonder how long the flue could be as i don't want to have it exiting though the roof if possible.
Post by matthewwalker on Apr 1, 2015 16:37:51 GMT -8
Judging by the loads I've put on it, I'm planning on it pushing about equal to a 6" J. I've run it with one 2'sq. wet brick bell into a full bare 55 gallon drum, all after the cook top, and it had a lot of energy left. It will require strong draft at the chimney and you can't shut it all the way down, as it requires a certain velocity through the combustion area to work.
Sweet! Much like Griz, a horizontal "riser" test was on my agenda for the spring. Your work saves me the trouble, and has testo validation to back it up, a huge plus. Looks like just the core to put next to the bench I built this past winter. I really like the slower burn option to add nuance to the heat output pattern.
Matt, it sure looks like good progress. Not to put a downer on it, far from that, but the Testo diagram on your website is not as good as it seems to be. The CO level is dependent on the O2 level in a big way. The more oxygen, the less carbon monoxide. O2 level is quite high, so the CO is not as low as it seems to be. Please look at the undiluted CO in the Testo spreadsheet and you'll see what I am pointing at. When the cook stove is airtight built and the O2 level much lower, like less than 8% and the CO is still down low that would be the true moment to jubilate.
Post by matthewwalker on Apr 3, 2015 6:41:54 GMT -8
Thank you for the input Peter, I am hoping to purchase the materials I need to shore up the air leaks before next burning season starts up and refine the build a bit. I was rushing to get something together to use as a test bed, so there are some details to attend to and that's a big one. You've inspired me though, so who knows, maybe I'll get motivated and get something up before too long.
Well, if an optimized batch box configuration, particularly secondary air feed, and a decent enough chimney stack can keep things flowing (and bring down particulate matter to boot)… it might be time to reassess the definition of a 'rocket' heater. Does it sound at all rockety? Or is this better defined in the category of masonry heaters? Or... is there a new category on the horizon? Interesting times...
I might have missed some details on your web site, and/but can you speak to the performance of the oven?
smarty: Dan my batchbox reached 1150C so refractory cement rated to at least 1200C
May 21, 2018 22:53:56 GMT -8
mercedes: Not sure where this question will end up...I just registered. HOW THICK SHOULD PERLITE/VERMICULATE/CLAY INSULATION BE BEHIND THE THERMAL BATTERY/COB BENCH IF IT BACKS UP TO A STRAW BALE WALL? Thanks! Can you please also post me: firstname.lastname@example.org thnx!!
May 28, 2018 20:05:23 GMT -8
kkp: Mercedes: Benches don't get real hot. In fact, they are rather cool compared to other areas. You shouldn't need a mix like you described
Jun 7, 2018 18:10:52 GMT -8
maartenmartens: beste Peter, ik heb je eergisteren een mail gestuurd via het contact formulier op je website , heb je die goed ontvangen ? mvg Maarten Martens, architect - geobioloog (mail betreffende de bouw van onze eigen RMH)
Jun 20, 2018 13:21:57 GMT -8
martinm: any one here with info \ experience with heat (from a mass heater) distribution with ducts throughout two storey house ?
Sept 8, 2018 22:58:52 GMT -8
padica: Good morning, this is a wonderful subject, please someone can help me with the theme of double and triple combustion, how it is achieved, theory and design, thank you
Sept 15, 2018 7:13:40 GMT -8
wiscojames: I'm afraid you won't get a response to such a vague question - I suggest reading through some of the threads related to your questions before asking for an explanation. People will be very generous with their knowledge if your question is more specific.
Sept 18, 2018 4:48:00 GMT -8
daniel: in my experience as I am working now on something of that nature, I have thought of making a heat exchanger and distributing the heat through vents using a slower fan. Now after a few years I realize that mass heaters give out primarily radiant heat, for
Nov 30, 2018 12:48:38 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place...
Dec 16, 2018 18:10:49 GMT -8
vesuvius: High Temperature Glass options,
Jan 4, 2019 16:28:17 GMT -8
vesuvius: Do any of you have experience with using the glass from home oven doors on a rocket stove? I'd like to have a viewing port on my stove but don't want to fork out for new ceramic glass. Any thought as to whether it would take the heat of a rocket stove?
Jan 4, 2019 16:30:40 GMT -8
yaya: you dont need the blowair for that temp..
Jan 13, 2019 16:43:57 GMT -8
flybywire: Glass window from an old washing machine is designed to take high temps. Cheap solution to your need.
Jan 27, 2019 0:10:58 GMT -8
coastalrocketeer: Anyone posting in this shout box... if you have something you want people to see and respond to, create a thread in the appropriate forum section... this is not the place to have a discussion... it is for short announcements
Feb 7, 2019 0:11:23 GMT -8
coastalrocketeer: you won’t likely get replies to questions here, and it is not a spot that makes holding an ongoing discussion possible...
Feb 7, 2019 0:12:22 GMT -8
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