There they radiate off 40 -ish % of their Heat Energy out through the surface of the Barrel (Heat Exchanger). The comparatively Cooler gases now Denser
and Heavier Sink vertically down to the manifold area where they turn 90º and flow horizontally 30 '+ (6 '' system)
A certain amount of heat must be radiated off of both Barrel(s) for the push-me pull-you effect to create this horizontal flow. If You have two Identical
rocket mass heaters RMHs, with Barrels of different sizes but made from Identical Metals, The Smaller Barrel with a Smaller Surface area to Mass Must
Radiate the same minimum amount of heat as the Larger Barrel With more Surface Area !
In order for this to happen the smaller barrel has to radiate that Heat Energy at a higher temperature !
Practically, this means more of the heat radiated off of the Smaller barrel is radiated off of the that barrels sides instead of the top . The larger barrel will
be Cooler, and easier to snuggle next too, and protecting your exposures will be easier !
This is exactly why when your 3 year old is tired and wants up in your lap they are such a great cuddle! With their smaller Surface Area to Mass Ratio
they must maintain their 98.6º ƒ by radiating of their excess heat energy at a higher Surface (Skin ) Temperature !
Your Two barrels should be fairly close in their ability to be Both a heat sink and a radiator ( I Think!) Wall thickness; the thinner metal will radiate better
and cool down faster! - This is not a problem as the other 60-ish% of your Heat Energy is slowly being radiated off of the Surface of your Thermal Mass
Ether barrel should last for years !
What is the white stuff under your J-Tube ? For the Good of the craft ! Big AL
Keep you posted on my progress. Antz
( And Many more wrong ways ! ) A warning watch out for the incredible Boat load of stinking, steaming Crap posing as Functional Rocket Mass Heaters RMHs,
in U-Tube Videos ! Some can literally be called '' Flaming Units of Death "!
Experiment as freely as you want, after a very quite period of several years, reliable and affordable testing equipment is moving us rapidly forward, with
the experience you will get from This Build anything is possible in your future, We all would like to see your future plans and builds !
YES ! Please see it you can find out from your friend when and where this insulation is coming from and post a link !
Speaking about which Here is a link to help you post Your location ( who knows you may have a Fellow member who is a near neighbor with RMH and Cob
Link below !
Think like Fire ! Flow like a Gas ! Don't be the Marshmallow ! Big AL
Building codes generally require at least one inch of free airspace behind a metal heat shield for any combustible wall or ceiling within several feet of a woodstove, and your barrel will need the same clearances and protection.
Antz : If I do the link right you can see a series of Video clips showing an gap underneath an RMH
This is available for purchase - but for purposes of discussion of air gaps it shows what you need to know !
For the Craft ! A. L.
Ta ta for now Antz
Antony Felton wrote:Hi all, thanks for the input, the burn tunnel has been shortened and works, the smaller this thing is the better for my situation. I will also lift the quartz slab (sorry still waiting to find out the specs.), with 4x2 plywood strips. As for the bell i going with the old school 200l drum, but a 50mm would or feels like it would be optimal. I will post an update on the reorganized design.
Ta ta for now Antz
If you are trying to lift the quartz to provide air flow (a very good idea in my opinion) I would consider using square steel tubing instead of a wood product (especially one which is impressed with chemicals you may not like off gassing into your living space). I've seen test lab builds online that have done this to protect their floors during test runs. I suspect it would work very well in your case too; better and safer than a flammable product in my opinion.
I would get a minimum of 1" square tubing. That should provide adequate air flow. More space = more peace of mind, perhaps, but costs increase too. I don't think anything more than 2-inch square tubing would be needed. On concrete I'd go with 1" and sleep well; on a wooden floor, trailer, etc, I may sleep better with the 2" air gap. Just my opinion.
I hope that helps. America does not seem to use it( according to wikiped), but my Ground oven builder friend here in Germany seems to like the stuff
As for the lifting of the CaSl plate i may use strips of fermacell (another german product) The metal bars may act as condensation magnet and create cold bridges within the wagon ( better known as Bauwagen) no direct English translation.
Here is the latest plan idea, please feel free to comment.
I feel a little stupid building this thing during a heat wave 38C today.
Toodle pip Antz
She still doesn't approve of my superhero lifestyle. Or this shameless plug:
The $50 and Up Underground House Book by Mike Oehler - digital downloadhttps://permies.com/wiki/23442/digital-market/digital-market/Underground-House-Book-Mike-Oehler