Win a copy of Compost Teas for the Organic Grower this week in the Composting forum!
  • 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 experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • paul wheaton
  • Joseph Lofthouse
stewards:
  • Mike Jay
  • Jocelyn Campbell
  • Devaka Cooray
garden masters:
  • Steve Thorn
  • Dave Burton
  • Dan Boone
gardeners:
  • Joylynn Hardesty
  • Mandy Launchbury-Rainey
  • Mike Barkley

Use of vitrified clay pipe instead of gallon drum

 
Posts: 20
2
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi,
I am thinking about using vitrified clay pipes instead of gallon drums for both inside drum and outside drum of the rocket mass heater: https://en.wikipedia.org/wiki/Vitrified_clay_pipe
What are your thoughts?
I would like to improve durability as gallon drum and high temperature/oxidation will cause me to have to change the gallon drum from time to time.
With the vitrified clay pipe I hope it will simply last.

Thanks
 
gardener
Posts: 2941
Location: Upstate NY, zone 5
124
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Vitrified clay pipes may be capable of withstanding high heat, but they are not going to be capable of absorbing fast temperature changes, or probably uneven heating, without cracking. The outer steel drum will not be exposed to the major heating, and perhaps due to the oxygen-poor atmosphere inside, are known to last a long time (decades) without deteriorating. The internal chimney, or heat riser, needs to have the lowest mass and best insulation you can get. Vitrified clay fails on both counts. You want a semi-porous material that will hold its shape and not deteriorate with extreme heating. Insulating firebrick is ideal but expensive and may be hard to get in remote areas. Ceramic fiber is ideal but may be fragile (or may be quite durable), also expensive and can be hard to get. Perlite or vermiculite mixed with just enough fireclay to hold it together, and formed into a cylindrical tube, is cheap and fairly easy to get, and very effective. A metal stovepipe of the right diameter as the outer form for this tube will also last a long time, as it is protected from the corrosive interior atmosphere by the lining.
 
gardener
Posts: 2995
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
129
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I've had one crack on me, when i used it as a heat riser. The bang was a bit scary.
 
Nono Junang
Posts: 20
2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks guys for the quick reply.
I will then stick to the gallon drum.
 
Satamax Antone
gardener
Posts: 2995
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
129
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
For the insulation holder, you have plenty of options. And for the "barrel" you have several more. Like fuel tanks from trucks, home heating fuel tanks, stainless wine containers. I havve made my workshop one with home heating fuel tanks.

http://donkey32.proboards.com/thread/1817/starting-build-220mm-rocket-double

Brick latice around a barrel too.

Post of april 21.

https://permies.com/mobile/t/80/12578/Oil-Drum-Living-Room-design
 
Our first order of business must be this tiny ad:
permaculture bootcamp - learn permaculture through a little hard work
https://permies.com/wiki/bootcamp
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!