• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • Anne Miller
  • Mike Haasl
  • Pearl Sutton
  • paul wheaton
stewards:
  • r ranson
  • Burra Maluca
  • Joseph Lofthouse
master gardeners:
  • jordan barton
  • Leigh Tate
  • Carla Burke
gardeners:
  • Greg Martin
  • Jay Angler
  • John F Dean

Retrofitting Piped Mass for Bypass Install

 
Rocket Scientist
Posts: 4309
Location: latitude 47 N.W. montana zone 6A
1421
cat pig rocket stoves
  • Likes 3
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi All;
My 6" batchbox  sits on top of what was my 8" J tube.
I have a brick and cob horizontal transition area with an ash pit and a  cleanout port all covered by a large thick rock.
My 8" pipe runs 12' thru the mass, makes a 180 turn and comes back 10' before turning vertical.

As an 8" J tube I had a bit of trouble with the initial draft at the start of the season and in the spring when it was warm outside.
A handheld fan blowing down the feed tube  reversed it easily and a few minutes later the draft took over and all was good.  

With the 6" batchbox. I have triple the mass that I used to have.  All that mass must heat before any heat is left to warm the piped mass and start the draw.
The primary intake on a batchbox is less than half the size of an 8" feed tube. Blowing a fan helps, but it is not working to my satisfaction.

This means I need a bypass.  I installed one on my 7" batch in the shop and it works great!
Now we need one in the studio!

After looking over what I had to work with.  I decided that drilling straight down into my transition area was the best place to pickup hot air.
Surprisingly... https://dragontechrmh.com/ donated a 4" bypass gate for the project!
A 4" diamond core drill was used to bore a hole thru the clay bricks.  A trench was then excavated over to the vertical chimney.  
With a few modification's and some Morgan super wool to seal things up, the gate slips nicely into place.

Today I received a 4" black 90 degree turn.  Sadly the 4" straight pipe did not arrive today.

After carefully measuring the location. Using my 4" core drill, I went down thru 3" of solid rock.
Then I had to elongate that hole to allow the pipe  to start over the gate.
Once in place I drilled a 1/4" hole and bolted it to secure the pipe to the bypass gate.
A few wraps of metal duct tape to help seal things up and finally some twisted steel wire to make sure its sealed.
Some Morgan super wool to seal the pipe as it enters the transition area .   (Morgan super wool is the Duct tape of RMH's)
And finally a coating of cob to pretty it all up.

As soon as the straight pipe arrives (it was in Billings this morning) I will drill into the vertical pipe and make the final connection!
I can hardly wait!
Photo's of the finished job will follow at that time.

















20210405_171042.jpg
[Thumbnail for 20210405_171042.jpg]
20210405_171050.jpg
[Thumbnail for 20210405_171050.jpg]
20210406_094012.jpg
[Thumbnail for 20210406_094012.jpg]
20210406_095729.jpg
[Thumbnail for 20210406_095729.jpg]
20210406_095737.jpg
[Thumbnail for 20210406_095737.jpg]
20210406_101836.jpg
[Thumbnail for 20210406_101836.jpg]
20210406_120836.jpg
[Thumbnail for 20210406_120836.jpg]
20210407_123431.jpg
[Thumbnail for 20210407_123431.jpg]
20210411_120422.jpg
[Thumbnail for 20210411_120422.jpg]
20210411_120815.jpg
[Thumbnail for 20210411_120815.jpg]
20210411_121213.jpg
[Thumbnail for 20210411_121213.jpg]
20210411_132538.jpg
[Thumbnail for 20210411_132538.jpg]
20210411_133258.jpg
[Thumbnail for 20210411_133258.jpg]
 
gardener
Posts: 1489
Location: Westbridge, BC, Canada
406
building solar woodworking rocket stoves wood heat greening the desert
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Its never too late to install a bypass. Such a wonderful tweak to add to any build that not only has startup issues but also to a stove you want to start in the summer (as an indoor cooking unit for example) so that you don't overly heat up the house with stored heat.
Takes the reliability issue up a big notch with making sure everything works as its supposed to.
Thanks for the documentation Thomas.
 
thomas rubino
Rocket Scientist
Posts: 4309
Location: latitude 47 N.W. montana zone 6A
1421
cat pig rocket stoves
  • Likes 5
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Bypass install 100% complete!
Small amount of smoke leakage at the gate that quickly went away.
Gas temperature inside the exhaust stack was rising within 5 minutes!
Previously it was at least 30 minutes or more before the dragon breath monitor started showing any heating at all!

This will allow Batch use all year during any outside temp conditions.
20210414_105924.jpg
[Thumbnail for 20210414_105924.jpg]
20210414_105931.jpg
[Thumbnail for 20210414_105931.jpg]
20210414_105941.jpg
[Thumbnail for 20210414_105941.jpg]
20210414_112010.jpg
[Thumbnail for 20210414_112010.jpg]
 
Gerry Parent
gardener
Posts: 1489
Location: Westbridge, BC, Canada
406
building solar woodworking rocket stoves wood heat greening the desert
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Excellent job as usual Dragon Master Rubino.

Nice to have a rocket boost lever to engage a whole lot of horsepower when you have a whiny dragon.

In the third photo, I see two Dragon Breath Monitors. Are you testing them for accuracy before they leave the Dragon Tech factory (garage)?
 
These are the worst of times and these are the best of times. And this is the best tiny ad:
Rocket Mass Heater Plans: Annex 6
https://permies.com/wiki/138231/Rocket-Mass-Heater-Plans-Annex
reply
    Bookmark Topic Watch Topic
  • New Topic