stratification chamber in a rocket mass heater with matt walker

http://richsoil.com/heat Shamelessly stolen from the world of masonry stoves, the word "bell" with rocket mass heaters can mean several things. So we go with "stratification chamber" to reference heating the mass (as opposed to the similar stratification that happens in the barrel). Matt Walker is building the outdoor rocket mass heater with smoker as he describes the stratification chamber technique he prefers. He likes to use a half barrel. He mentions filling a tub with water and if you flip it upside down, you fill it with hot exhaust gasses. It comes with interpretive dance! I felt like it might not be clear to everybody, so I paused, added an animation and description, and then rewound and did the thing with matt again - my thinking is that on the second pass it makes a lot more sense to everybody. My animation shows filling a bucket with water because the water is heavier than surrounding air. Then I flip it upside down and fill the bucket with hot air. This is the same sort of effect you get with a hot air baloon. I then demonstrate that the bucket conducts heat, so the gasses in the bucket cools as the surrounding air is warmed. In time, the heat stratifies with the hottest air at the top and the coolest air is at the bottom. A regular rocket mass heater has a duct that starts low and finishes high. The heat is forced to the far end of the bench. The vertical exhaust near the barrel gets a bit of extra heat to make it rise - a tertiary thermosiphon. All the crappy animation is by me! On a larger scale this would be called a kang bed stove or a roman hypocaust. After raising the manifold exhaust, use a hollow bench - with a large cavity. The hot exhaust enters the chamber and spreads out evenly. Then the coolest gasses are extracted from the bottom. More about rocket mass heaters in our DVD set at https://richsoil.com/wood-heat.jsp http://permies.com Thanks to Dan Ohmann of The Grass-fed Homestead channel for helping me with the editing:    / @thegrassfedhomestead   Relevant stuff at permies: https://permies.com/t/48651/rocket-ma... https://permies.com/f/260/rocket-mass... https://permies.com/u/149366/Matt-Walker https://permies.com/wiki/63312/Rocket... Permaculture Playing Cards https://richsoil.com/cards.jsp 177 hours of Permaculture Design Course and Appropriate Technology Course https://permies.com/pdc Better Wood Heat: DIY Rocket Mass Heaters 4-DVD set https://richsoil.com/wood-heat.jsp Wood Burning Stove 2.0 4-DVD set http://www.woodburningstoves2.com/ World Domination Gardening 3-DVD set https://richsoil.com/wd-gardening.jsp Permaculture Homestead Podcasts https://permies.com/f/88/permaculture... Permaculture Design Course and Appropriate Technology Course https://richsoil.com/pdc.jsp Rocket Mass Heater Workshop Jamboree https://richsoil.com/rmh-workshop.jsp Sign up for my daily-ish email, or my devious plots for world domination http://richsoil.com/email.jsp music by Jimmy Pardo http://permies.com/t/30796/Jimmy-Pardo Thanks to my patreon peeps for pushing me into making videos again: Keith Kuhnsman thomas adams Jocelyn Campbell Julia Mason Dominic Crolius Josh Phillips wade L Suleiman ALAQEL Ash Jackson is The Scrollbard Jason Hower Bill Crim Full Name Doug Barth James Tutor David Ingraham   / pwvids