Hello, I have a 40' high cube shipping container that I will be living in this winter at 43 north on the east coast. The only window in the container is a 6' patio door facing south that will open to a 4'x8' greenhouse supported by the the container doors.
I would like like to build a rocket mass heater for the container but I am concerned with the air tight nature of the container. What RMHplans would be a good size for 320 sq ft living space? And how do I get fresh air to the RMH?
Kirus M. : Just a little sprinkling of science/math at the start, and then we move on -Kinda ! All through your build we will be talking about the size of Your Rocket
system, and the need to have a Constant Cross Sectional Area C.C.S.A. throughout your build to keep your combustion gases Flowing smoothly!
An 8'' system will have a cross sectional area of 50-ish inches, a 6'' system will have a cross sectional area of 28'' Approximately 1/2 !
When we take a given pipe size again 8'' , if we cut the size in 1/2 we reduce the area down to a 1/4 so a 4'' system would have a cross sectional area of 13-ish''
But we are not done yet, The fastest flow of ether a gas or a liquid is right down the center of the pipe -gradually slowing down until right at the inside surface of the
pipe we stall because of the effect of a condition called laminar flow ! So because the smaller pipe has more affected surface area to volume, its Laminar Flow loses
will be greater in proportion than will the larger pipe with more volume to surface and thus lower Friction loses.
This may sound like a lot of hot air- but ask any volunteer or paid fireman -reduce the size of the pipe by 1/2, reduce the flow-through down to less than 1/4 !
Both the 8'' rocket system and the 6'' system are too big for the cubic feet of space you need to heat !
There is one company DragonHeaters Dragonheaters.com that manufactures a 4''system for sale to be installed by the D.I.Y. rocket enthusiast!
you should check them out !
With the number of Rocket Mass Heaters RMHs made World Wide now well past 100,000 -most Rocketeers at Permies will tell you that the conventional 6'' system
is the very smallest rocket system a first time D.I.Y. builder should attempt ! Indeed most 4'' system attempts as 2nd or 3rd builds are failures even then!
My best recommendation to you is to goto Rocketstoves.com to download your PDF Copy of Rocket Mass Heaters this is "The Book'', from which most
of the RMHs have been built! THis includes the 95% of 1st time builds (that worked)
"The Book'' will save you time, money, and frustration trying to piece it all together. When you come back here to your Fellow Members you can be confident that
you are using the same words to describe the Sizes, Shapes, and Orientation of the RMHs parts to themselves and each other !
One more question for you, is this Container a refrigerated container with insulation and what class insulation doses it have !
If there is a Rocket in your future your fellow members will help you find it ! For the Good of the Crafts ! Big AL
Success has a Thousand Fathers , Failure is an Orphan