Glenn Herbert wrote:Hmm...
Twisting the riser to try to make cyclonic flow has been shown to have no beneficial effect. The kind of turbulence you need for mixing happens from the sharp angles in the flow path, vertical feed to horizontal burn tunnel to vertical heat riser.
BoBo Jones wrote:this is my first post on these forums and im not great with forums . but I shall try to do my best .
quick story . so im building a greenhouse . a winter greenhouse , temp gets as low as -5 . after researching , it'll be sunken with insulated back wall . so I figure it'll need heating . as I researched heating I hit early on Paul Wheaton rocket mass heater you tube vids and bang that's the design for me . so I spend time soaking up all the info I can find about rocket mass heaters . so now im at a stage where I understand how it works , what drives it and how it all fits together . the better designs and more impotently the fails . so I get all that .
but there is one thing that im not getting......... so the air gets sucked in heated up and comes out of the top of the chimney into the barrel . what is the relationship between there and the top of the barrel . how does having a larger space above the chimney effect the mass heater / all I can think of it that by having a larger space increases the cooling effect . is there something more to it then that ? is my question .
I want to build and try something different to the barrel design .