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Rocket stove in an RV?  RSS feed

 
Natasha Green
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I've been reading about RMH for years, but have only recently stumbled upon rocket stoves. My family and I live in a 30' RV and we can't really afford propane. I want to take my propane stove/oven out and build a RS to cook on. It would also be great if I could implement a water heating feature as hot water is also propane powered. I've also played with the idea of adding mass so it would heat my space more efficently.

Now for my biggest problem. I'm not very handy and even after years of study I barely grasp how to build either one of these. As I mentioned before, money is an issue, so I've not bought any books, nor can I afford professional help on this project.

I live in an area with clay (although I have no idea if it suitable for a RS), which is what I'm wanting to build with.

I'll be posting the dimensions of the current stove I have. Also, the reason I'm wanting to squeeze one into this space is there's already metal protecting the wood interior from heat.

Any help is greatly appreciated!


*Note* RMH is typically used for heating, RS for cooking.
 
allen lumley
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Natasha Green : Welcome to permies.com and our sister site richsoil.com, and a Big Welcome To our Rocket and Woodstove Forum Threads!

O.k. To start off you will need to keep the range hood/exhaust fan over Your 3-burner countertop and breadbox/oven !

The rocket stove in its most common use is an unvented stove designed for use outdoors ! Any attempt to direct vent Your rocket stove will limit the size

of your cook top, and send most of the heat up the chimney- it will get screamingly hot if you are burning it hot enough to have it burn cleanly, and will burn

dirty if you try to moderate the temperature that your stove burns at.

So 1st recommendation link : https://www.youtube.com/watch?v=CfCLRufKhjc&list=PL4680BB06883874B3 - use Perlight or Vermiculite for insulation between

cans and then use it outdoors and see how hot it gets ! I don't see you using Your Rocket stove while sitting on the counter or underneath an overhead cupboard.

hot water from a Rocket stove or RMH, hot water that flashes to steam expands 1600 Xs and does so instantly - You can google the phrase ''Boom -Squish'' -

THe steam explosion is the boom, the squish is you and yours!

Think Boston Marathon Bombing with more Casualties and more full Body, full thickness burns !

THis is where I ask you to go to Rocketstoves.com to price and download a PDF Copy of the brand new 3rd Edition of rocket mass heater, this will

allow you to comeback here sure that you will be using the same words to describe to Ratios, Diameters,Dimensions, and calculating Constant Cross-sectional

areas, and the proper Orientation of the parts to themselves and each other !

You need to dig down to your clay and extract a gallon- or so and put it and enough water to cover in a 5 gallon bucket, then Google Soil Sediment Test, and

do that test ! latter you can test its fitness for other duties !

Warning ! Any metal that does not have a 1'' 2'' air space behind it or that directly touches ether the wooden studs in the wall or the paper backing on your

insulation Is a Hazard ! Merely having metal over wood is not a guarantee of fire safety !

Many of the Rocketeers that post to these pages where no farther advanced or better prepared to build Rockets than you are now, - If there is a rocket in your

future we will help YOU build it ! For the good of the Craft ! Big AL !



 
Glenn Herbert
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One important factor in advising would be whether you are mobile in your RV. is it primarily a stationary home that may occasionally move, or are you frequently traveling?

Also, what is your climate like? That will affect what you can accomplish with a given design.
 
Natasha Green
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Boom,squish only happens with pressurized systems yes? Because I already know about the dangers envolved with that if you don't know what you're doing, and I don't.

I was thinking of copper tubing coiled around the exhast. One end coming from the bottom of my current hot water tank, and the other going to the top.

My fan over the stove has never worked in my RV, so I was hoping to go with something like the Justa stoves used in Honduras. My biggest fear is that I don't have the space.
I might need to take out my stove to see if the metal is going to be enough. It looks to be about an inch of space, but I'd rather not burn my house down.



I live in PNW coastal/mountain area. My RV is mainly stationary. It only moves when I do.


Also thank you for the welcome! I've been reading posts on here, and been on richsoil a lot, especially recently. I love the sharing learning atmosphere here and thought I'd post a few questions that only people who've done it can answer.
 
Glenn Herbert
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Boom squish only happens with relatively closed systems. It doesn't need to be pressurized or even sealed, all it needs is for there to be insufficient escape room for steam flashing in a coil, which happens almost instantly when it happens. A coil could rupture and spray steam in your face even if its ends are in an open-topped tank.

At the recent Pyronaut event, Peter van den Berg built two small RMH systems suitable for use in a tiny house, both of which can be used for cooking on top of the barrel. Some adaptation of these might be useful, and you might be able to further modify one to not accumulate heat in the whole barrel when you don't want to heat your RV.
http://www.permies.com/forums/posts/list/40/44671
You might ask Peter about this in the thread.
 
allen lumley
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Natashia Green : If your RV is a semi permanent structure on the land you may be able to add on a lean-to structure to the outside of Your RV and create a

Multi-functional RMH at ground level - allowing the heat from the RMH rise up into your RV! Basically you are adding a new central hearth onto your living structure

Though at a lower level, radiant Heat off of your barrel becoming convectional air circulation/ heating for the higher RV structure !

With an unpressurized system ( you have done your research ) and placing your large diameter Coils 1'' to 2'' stainless around the Horizontal piping within the

Thermal Mass you only need to deal with pumping /circulating your water supply - again loss of power to a circulating pump during a power failure could potentially

isolate and super heat water trapped by the resulting non-circulation !

For the Crafts ! Big AL

 
Glenn Herbert
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Location: Upstate NY, zone 5
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As a point of reference, I recently built a 6" all-cob J-tube rocket stove with solid steel 18" square cooktop and chimney. It burns great, though reports are that the cooktop is too far from the fire to heat up fast, so one slightly shorter than 40" from bottom of burn tunnel to cooktop might be better.
 
Dannie Westerhouse
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I have a few questions that are related to RMH in an RV...we own a 14x70 single wide mobile home in the country.....definitely stationary. We are in the process of replacing the walls with sheet rock. It currently has no heat source and we live at approx. 2500 feet in Oregon. We get snow here. Ok so my question is other than reinforcing the support beams in the floor in the living room where we want to build our RMH....how should we prep the wall where the heater is going to be? The walls are 2x3 construction with 2x6 support beams with sheet metal outdoors and sheet rock (drywall) indoors with insulation (R13). Should we use cement board over the sheet rock and if so how thick? How should we prepare the floor...what is the best base to use? Can we plumb the exhaust pipe out the side rather than up through the roof?? That is what people do for pellet stoves here. I have done lots of research on RMH and RMS and feel like that is the best and least inexpensive heat source for us. I have looked at the ANNEX plans...don't think we need something that extends that far across our living room. Should we keep the "bench" on an exterior wall? This will be our first time doing this and want to get it right...and safely as we have young children. Thoughts.....
 
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