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Pushing a 10" horizontal with a 6" ???  RSS feed

 
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Can it be done?

This RMH is in a green house. I'm using 15' x 10" well casing for the mass. It has 15' x 10" chimney pipe.(5' above gh)

I don't have enough brick to build a 10" J tube. I just have enough for a 6" and maybe 8" J not a 10".

If I build a extra tall riser. Will it push a 10" mass pipe?

first pic is of the 10" mass pipe with a 3.5" intake along side of it.

2nd of the mass (rammed earth incased in Styrofoam)

3rd is the 6" is a half tossed together 6" J. It is running just not were it needs to be.

any ideas would help.

thanks.



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Dan Dronberger
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missing pic
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gardener
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Location: latitude 47 N.W. montana zone 6A
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Dan; I'm no expert at this but I am learning. I would say that yes, you can plumb your 6" into a 10" mass pipe, would be like a bell . You mentioned 15' long , is that all ? How many bends ? How is your fresh air tube going to be plumbed ? We need more info to help.
 
Dan Dronberger
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thomas rubino wrote:Dan; I'm no expert at this but I am learning. I would say that yes, you can plumb your 6" into a 10" mass pipe, would be like a bell . You mentioned 15' long , is that all ? How many bends ? How is your fresh air tube going to be plumbed ? We need more info to help.



The GH is 30' x 18.

The RMH is in the center. The only 90 is at the stack. The chimney is on the out side.

Would reducing the size of the chimney stack down to 6" help with it flow?

It is single wall ducting on the N side and cools rapidly.

It's just for heating two aquaponic tanks. That will set above the mass/pipe.

Not looking for massive amount of heat. Just enough to keep the insulated tanks close to 65 f.

We live in sunny SE New Mexico. So we get tons of solar energy during the day.

Just need the extra radiant for the nights.



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gardener
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Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
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thomas rubino
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Location: latitude 47 N.W. montana zone 6A
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Dan; i'm thinking no, don't reduce to 6" . Are you having draft trouble ? Is there an easy way to insulate the outside chimney ? As an experiment , when it will be dry at night , wrap fiberglass insulation around the outside chimney to see if that helps with draft. It cools of quite a bit at night in the high desert. How dry is your cob ? If your cob is green then it must dry out and heat up to draft properly. Are you closing off the feed tube after the last wood burns , or leaving it open all night ? Are you using firebrick to make your riser ? If yes, then consider making a cast riser with fireclay & perlite and using your brick to build a bigger J tube.
 
Satamax Antone
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thomas rubino wrote:Dan; i'm thinking no, don't reduce to 6" . Are you having draft trouble ? Is there an easy way to insulate the outside chimney ? As an experiment , when it will be dry at night , wrap fiberglass insulation around the outside chimney to see if that helps with draft. It cools of quite a bit at night in the high desert. How dry is your cob ? If your cob is green then it must dry out and heat up to draft properly. Are you closing off the feed tube after the last wood burns , or leaving it open all night ? Are you using firebrick to make your riser ? If yes, then consider making a cast riser with fireclay & perlite and using your brick to build a bigger J tube.



Myself, i would say the contrary.

Use the 10" well casing as a bell, and make the chimney stack the same CSA as the J tube. And make it plunge a bit inside the 10" well casing, something like 3' from the bottom. And obviously, insulate the chimney stack!

 
thomas rubino
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Dan; Listen to Max, he has way more experience than me.
 
Satamax Antone
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thomas rubino wrote:Dan; Listen to Max, he has way more experience than me.



Not that much mate! You know cob, i'm yet to make a conventional rocket
 
Dan Dronberger
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I tore the core down and noticed that I'm getting moister from the ground.( Fixing that) A 6" is all I can do with what the bricks have.
The riser is a casted one (perlite and fire clay)

I looked through my air duct junk pile and I don't have enough 6" to go 15'. Do have the parts to reduce every thing down to 6".

The reason I went out side with the stack was I didn't want to cut a hole in the plastic. It looks now I don't have a choice on the plus side, wouldn't need to insulate the stack. Don't have the insulation or the monies to buy it.

So inside with the stack reduce it to 6" about half way up.

Also reducing the barrel from 55 to 30 to force more heat into the mass. That should also help with the stack problem.

Back in two days with an update and pictures.

Thanks for the help.



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Dan Dronberger
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Really like building these things. I want to build more.

This thing is a mutt. Mostly red brick and a couple fire brick for the top of the burn tunnel.

I don't expect it to last. I know it will work. We'll see how long it does.

This GH RMH is cheep experimental build. All the parts were collected locally. With a little help from my friends.

per-lite and fire clay are the only expense.

enjoy



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Dan Dronberger
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Dan Dronberger
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Dan Dronberger
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Finished sealing it up to the mass today. Still haven't reduced the stack yet. That's next.
We're are having, what we call a tumbleweed event. 39mph winds with gusts up to 50 mph.

seen a 6' tumbleweed blow by today. yikes!

Had excellent draft you could say. Didn't take much to get it roaring. Only took 4 sheets of grocery store flyers with dry pallet splinters.
After it started burning good I filled it up with a full load, as many as I could stuff in it.

Big mistake. It went Nuclear !!!

To much draft. By the time it quit burning. I could not keep my hand on the pipe at the end were it connects to the stack. (14' away from rmh)

I'm thinking with some fine tuning of the stack. This mutt will become a full blown dragon.







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Dan Dronberger
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Pic of it attached to the mass.
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Dan Dronberger
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I reduced 10' of the stack to 8" and did a burn. It helped.

I bought a 8" to 6" reducer and will reduce the top 5' to 10' of the stack and see how that works.
Before I move the stack inside the GH. Really don't want to move it inside if I don't need to.

Instead of putting cob around the RMH I'm using some landscaping bricks. They were given to me , by a dear friend who died last month.
He really wanted to see it finished. He loved sitting on the prototype. Fare well Roland.

They should keep most of the water off the core and double as a solar heat battery too. Only had enough to do one side, will need to buy more or find some thing else that will work for the other side.

any comments or questions are welcome.

awful quiet in here.



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Rocket Oven plan download
https://permies.com/t/rocket-oven-plans
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