Rocket Mass Heater for my home

Rocket Mass Heaters, Rocket Ovens, Cold boxes, Solar collectors, etc..
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Re: Rocket Mass Heater for my home

Postby mannytheseacow » Sat Oct 18, 2014 2:53 pm

"Meet George Jetson..."

Haha, looks great, Matt. That big new window and that long bench totally gives a futuristic Jetsons feel. Love it!
"Knowledge is power. Arm yourself."
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Re: Rocket Mass Heater for my home

Postby matt walker » Wed Oct 22, 2014 4:01 am

Here's a quick view of it burning. Sorry about the camera noise...

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Re: Rocket Mass Heater for my home

Postby DrewInToledo » Wed Oct 22, 2014 10:49 am

Wow Matt! That is beautiful and it looks like your generating plenty of BTUs there. I bet your bench is nice and toasty. I didnt fiddle enough to know what a p channel is. Maybe its just a curved tunnel. How do you feel about creating a simple sketch of your system since youve modified it? If not, my feelings wont be hurt as i have nothing to gain except quiescing my curiosity.
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Re: Rocket Mass Heater for my home

Postby matt walker » Wed Oct 22, 2014 4:49 pm

Yeah, I should do that. I'll try to get to it. If you are curious about the firebox, check out this link...

http://donkey32.proboards.com/post/6691/thread
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Re: Rocket Mass Heater for my home

Postby DrewInToledo » Wed Oct 22, 2014 6:55 pm

Perfect, Matt. No need for a sketch. That 'splains it!

Thank you.
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Re: Rocket Mass Heater for my home

Postby matt walker » Tue Dec 02, 2014 1:49 am

I'm working on a full follow up to my conversion, and found these old construction clips from a couple months ago. So, here's a bit of a glimpse at the conversion. I'll have a recent follow up video up soon...

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Re: Rocket Mass Heater for my home

Postby Nirky » Tue Dec 02, 2014 5:54 am

Really looking forward to viewing the finished design in action.
About how long will each batch burn?
With the added tube, will the batch box burn as good or better than the original core before modification?
I don't think I'll ever get over Macho Grande, those wounds run pretty deep.
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Re: Rocket Mass Heater for my home

Postby matt walker » Tue Dec 02, 2014 5:36 pm

It's about 90 minutes between loads on average Nirky, and according to my Testo it's burning cleaner than anything I've ever seen. Long, flat lines, with CO below 10ppm, and long stretches below 5ppm. I think particulate is way down too, since I've got way less air moving through the ash bed. That's speculation though, I can't measure it.
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Re: Rocket Mass Heater for my home

Postby Nirky » Tue Dec 02, 2014 11:44 pm

Wow, 90 minutes, that's an eternity! When I'm burning dry wood in my non-batch box system, 15 minutes is all I get. Max. It's voracious. I've resorted to adding a mixture of non-dry fuel in with the dry to extend burn times. Have you calculated how many times larger the batch box is compared to the capacity of the wood fuel area of your previous J?
I don't think I'll ever get over Macho Grande, those wounds run pretty deep.
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Re: Rocket Mass Heater for my home

Postby mannytheseacow » Tue Dec 02, 2014 11:51 pm

90 minutes is a crazy long time, isn't it?! I've don't that mix the wet with the dry thing, too, but I got away from it because it kind of effects the way the system burns (not as hot, and more junk in the lines).

A 6" batch box has about 3 times the wood capacity as an 8" J.

How's your stove coming, Nirky?
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