Edward Gurd

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since Dec 14, 2011
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Recent posts by Edward Gurd

I've been thinking along these lines as well. Having a very tall riser for more pull.
One thing I wonder is if this would allow a venturi to be built in the burner tube for stronger velocity air flow right where the wood is. When I blow on burning with a very narrow stream of air, it seems to burn very strong. The conclusion I hope to make in that scenario is that it's the air velocity more than the total air volume that increases the temperature of the burn. I also wonder if with a taller riser, inducing a vortex would also make things work better. Does watching youtube count as research? If so, I've researched fire tornadoes and flame vortexes a bit. The most dramatic ones are where a very short unfocused flame is drawn into a tall narrow flame many feet tall. One example showed a sterno flame (usually 1 inch tall) being drawn up to 3 feet tall when placed within a rotating mesh screen.

Please let us know your results once this is built.
13 years ago
I lived on a site where we had a 30kw hydro and in winter, ice was a problem even with 50 cubic feet of water flow per second. I have some amazing pictures from it. How deep were you planning on burying your pipe for your head and how much solarthermal are you going to put on your reservoir if your goal is to use this in winter in the Pacific North West?
13 years ago
I've been wanting to build a waste oil heater for many years. Our shop is presently unheated and with our plentiful supply of waste glycerol and a regular supply of waste vegetable oil, the research demonstrates that a babbit ball "nozzle" oil fired furnace would be the best way to get our shop hot. The machinist who drilled the teensy hole in our babbit nozzle has a wood fired rocket mass heater assembled and working wonderfully in his domiscile. The more I look at the design of the RMH, I keep thinking that it has to be the most effective way to distribute produced heat from any type of furnace, even a propane flame. So my grandiose idea is how to build a rmh that takes in the flame from a babbington burner. These burners can produce 2-3000 degree flames that are 5 foot in length depending on your flame tube and by themselves can entrain a very strong current of air. I have a pair of 5 or 6 foot 3" steel pipes that could be used as a riser tube for the flame and wonder why if well insulated with a perlite filled tube this wouldn't work wonderfully for the vertical portions of a RMH.

I understand that a waste oil heater isn't the highest of permaculture designs, but this forum appears to be the best place to gather and share information on how to build one of these ingenious creations. Heck, they even have the compressed "air" portions of the babbington burner supplied by steam produced by the burner.
We're still assembling the materials for the babbington heater and with only a little more work, our pile of supplies can include what is needed for a RMH, so I'm thinking, why not go for it, have it all.
13 years ago