And here's some pictures of the modified industrial gas water heater. I've build a new exhaust and intake manifold to increase the pipe diameters (160mm). The smallest internal passage in the last stage is about 210cm2. It will pass the heat on to a 1500 litre warm-water-buffer.
The core is almost finished. It has an 15,5 cm octagonal riser out of high alumina-oxide bricks
The door is also ready but have no picture at hand right now.
Was planning to increase the diameter in the top row of the riser to 20 cm (as in the sketch up drawing). To help spreading the heat a bit more underneath the metal cook top surface. These are two rather big plates of about 55*50 cm. made out of 8mm mild steel, with 10mm steel plate welded underneath.
I'm still a bit unsure about the white oven position and the path of the gasses around it.
I'm wondering if the bell construction underneath the plates will not heat them up to equally all over. Well I mean some area with bit milder cooking temperatures is off-course also wanted.
Ah, and I plan to make a bypass in the top right of the cooking bell.
I had had started this project already two years ago when we were building the kitchen. Chose the make a deepened section in the floor to accommodate the recommended riser height. By now I would have skipped that and go for a shorter riser design as I see now here appearing. Loading this thing is going to be a bit uncomfortable. Well it will be a unusual stove set up with hopefully very good performance.
Wow! I'm really impressed with your skills. That is a very professional looking build, the welding, the masonry, all look excellent. I kind of like the sunken floor idea. It looks like you'll be able to sit with your feet in the loading area and get a quick warm up on cold mornings.
1500 litres is a huge amount of water to warm up. I guess it will depend on your usage as to how effective the stove will be at heating that much up. Will the holding tank be well insulated or will it be used as thermal mass to warm the living space?
At any rate, you will have a beautiful and hopefully effective rocket stove. I'm not that much into the exact size ratios but yours looks to be very consistent with the batch box standard so I would expect good results.
Thanks for the responses! I love to work precise and give detail to what I'm building.
As for the oven, any ideas how to optimise heat transfer? I'm designing the thing right now. I would imagine that the top will receive sufficient heat but the bottom area might not. I made the height of box pretty low with big top and bottom surfaces. there will fit two big restaurant trays inside.
Lowering the the exhaust further down? somehow forcing more hot gasses underneath the thing? Naja, with 200 Celsius I would already be happy. Later on a separate baking oven is planned.
The buffer tank will be insulated and sit directly next door in a separate room together with the exchanger and all the piping and pumps. The water will be used for showering, kitchen use, washing-machines. And for lightly heating a cob-bench and some wall surfaces in the room. In total some 80 meters op piping superficially buried in mud. For all these users the stove will have to run pretty much trough out the day I guess. We are 10 to sometimes 30 people living together and there is lots of cooking happening.
there are gasses flowing under the oven and the metal is a good heat conductor so I guess it will heat up evenly. And the whole thing is massive so it will take time to absorb the heat. Any concerns about the water condensation around the tank?
thanks for the link, interesting understand your remark now. But I'm having a different approach. Not a tank in a bell but a exchanger with a much smaller water content. The water will only start to circulate to my big buffer tank when that thing has warmed up. And it will be fed via a charge valve at 60 C. It gives more complicated hydraulics but it eliminates any condensation problems.
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
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