Download: Rocket Stove Heater/Cooker Pellet Performance

By kelhawk1


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I can only assume a One liter boil test is simply an indication of how fast a particular stove design warms up. I am not aware of a particular set of standards that would render it meaningful in comparing say, your stove to mine. The purpose of this test was simply to give me another excuse to burn, and share some ideas.
The amount of fuel consumed for this test, and the entire 35 minute unedited burn, was nearly 4 pounds of wood pellets. The fire starters I use are Bounty paper towels, folded, rolled, twisted tight, then soaked in BBQ fluid. They alone contribute substantially to the warm up time of the one liter of water, and are the best starters I have found. Using the method shown, this cold stove will boil a liter in under 7 minutes *without* the 60 pound heat exchanger. I thought I'd see how long it takes having to heat all that steel, *plus*, heat the water with a hotplate, rather than direct flame like most boil tests do. No doubt just having that 5/8 inch plate between the flame and the kettle will slow*any* boil time considerably, let alone having 50 more pounds of heat sink also.
After playing with stoves like the Gabriel Apostle design, I settled on something like the design by KSPrepper1, only I ended up inclining the burn chamber about 25 degrees. That brought the small end of the "J" vertical, and the next thing I know I am trying to burn wood pellets and sticks together and/or alternately, with hopes of having a practical heat source.
Unfortunately getting the pellets to feed smoothly intruded on the space for the wood, so this stove will only burn the two fuels alternately, not simultaneously. I can however, transition from one to the other rather seamlessly, and look forward to experimenting more with pine cones; and with deer & elk droppings.
After looking at the rocket stove concept for awhile , I had almost rejected it as impractical, due to the need to constantly prepare and add fuel. Not very conducive to sustaining long burns in cold climates. Then I saw Kevin Bacon's Omega Stove and conjured up my own version. I wasn't having much success with the inverted drum thing and his reasoning made sense.
What evolved is a practical and versatile little multi-fuel heater and cooker that can simmer for hours burning less than two pounds of pellets per hour, or gobble up more than four pounds per hour if it's needed. It does very well with branches if someone is close by to keep it stoked, and if you gotta leave it for a bit, install the pellet chute and pour in some pellets or deer droppings. (Any Zoos nearby?) All that remains is implementing methods to trap heat, like heating water, a greenhouse, cabin, fish tank, all the above...and next...
My desire to burn pellets and branches simultaneously has spawned another attempt to make that work, which I will try to share as I build. Had fair luck with a bigger mouth version, burning both pellets and wood, and have gained some insight. Can't wait till morning to work on it. Keep an eye out for a bigger version..