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wood burning stoves

Mass heat exchanger on Pellet Stove?

Posts: 50

Location: Michigan West Side

posted 13 years ago

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I been thinking my pellet stove burns clean enough that I could hook a mass heat exchanger to it.

Has anybody done this before?

"to Tinker or not to tinker, that is the question!"
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Ernie Wisner

gardener

Posts: 791

Location: Tonasket washington

posted 13 years ago

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nope
it would have to be forced air to get the thing to work i believe and i just dont like things that shut off when the power goes out. give it a shot Out side and see if it will work. might help some folks not freeze to death for 20 or so hours when the blizzard knocks out power.

Did i mention i dont like pellet stoves?

Need more info?
Ernie and Erica
Wood burning stoves, Rocket Mass Heaters, DIY,
Stove plans, Boat plans, General permiculture information, Arts and crafts, Fire science, Find it at www.ernieanderica.info

dan murf

Posts: 50

Location: Michigan West Side

posted 13 years ago

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Ernie Wisner wrote:nope

.Did i mention i dont like pellet stoves?

Hello Ernie

I am new here, sorry I did not know you didn't like pellet stoves? I checked you out and see why you don’t. I am very interested in some of your work!

I am an engineer, I work a lot worth blowers and airings for cooling systems. There is a way of using an airrings/venturies to move air towards negative pressures. ?? thinking here ??

It is my belief that the Vacuum/negative pressure is why you are getting suck a complete and total burn on your awsume rocket stoves!

But my biggest drawback to a rocket stove design is for "me personally", is I am not at home nearly as much as I would like. Just trying to figure a way to automate something for my needs.

Ernie I think your goals are adorable ! Thanks for your advice Ernie

Ernie Wisner

gardener

Posts: 791

Location: Tonasket washington

posted 13 years ago

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No worries; i just dont like things that folks trust to keep them alive and then die cause it dont work. Ok folks are also to blame so i cant rally criticize the makers of the stoves.

I tend to concentrate on passive systems so things work without having to think about them. but i do understand that additions to the system can be active. i just want the basic unit to work no matter what.

Fred Morgan

steward

Posts: 979

Location: Northern Zone, Costa Rica - 200 to 300 meters Tropical Humid Rainforest

posted 13 years ago

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Perhaps some kind of hybrid. I can see wanting a feeder, but you want to be able to get it out of the way so you can do it yourself, in the case of a power outage that goes on for a few days, like happens with ice storms.

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dan murf

Posts: 50

Location: Michigan West Side

posted 13 years ago

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Fred Morgan wrote:Perhaps some kind of hybrid. I can see wanting a feeder, but you want to be able to get it out of the way so you can do it yourself, in the case of a power outage that goes on for a few days, like happens with ice storms.

Yes exactly Fred, I was thinking of (could be small geared 12v battery powered) Large Diameter auger feeding chips/pellets? like 4" to 5" light duty corn augers (like the ones I have laying around here at work) I have not seen any chips being combusted in this way. I ass,u,me they would get sucked in to the fire chamber before complete ignition? Has anyone on here tried burning chips or pellets before? I have this “grand idea” lol that you could make a ceramic baffle, a venturey shape, at the entry of the fire chamber, right at the point of the combustion. & yes if power goings out simple slid bad out of the way & you got manual feed all day..

Ernie Wisner

gardener

Posts: 791

Location: Tonasket washington

posted 13 years ago

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I haven't yet but it is on my list of things to do. I want to be able to feed the rocket chips and pellets or dung pellets auto magically. I was thinking a cartridge filled with the biomass pellets of my choice feed the fire every 30 seconds. but a battery backup and a feed that could be removed would be good. a pellet stove auger is the right size for most of the small pellet type dungs and if you need to use the big stuff then you get to hand feed it.

I worked out the burn rate at a pellet every 30 seconds but it could be faster if you are feeding it to a bed of coals. in order to get it burning correctly you either need forced air or you need an ignition source that has better fuel value and the pellets are just support for the fire. the trick will be to see what kind of ignition source you need for a clean burn. the Rocket puts out steam an CO2 without smoke so if you could dial in the pellets to burn at a rate that would allow the stove to continue to burn clean with out a power outage. that would be very cool. if you need start with the electric plug in the wall version and work back to the battery version.

Andrew Parker

pollinator

Posts: 524

Location: Salt Lake Valley, Utah, hardiness zone 6b/7a

posted 13 years ago

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If you are interested in using pellets or chips in a natural draft stove, check out this design by Alex English. He calls it a natural draft Dasifier. You can review discussion of the design here (There are 21 post in the thread. Click on the title in "Next Message:" to move forward in the thread), and here.

Satamax Antone

gardener

Posts: 3471

Location: Southern alps, on the French side of the french /italian border 5000ft elevation

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posted 13 years ago

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Ernie, i might have a solution for feeding the rocket with chips.

I have a lot of theses due to working with wood. So it would seem natural to use theses.

The idea which came to me is old like the world, a knock hopper like on windmills. With peletiers, or tecs or whatever you call them on the barrel, i've seen you can produce energy.An electric motor, a little square arbor knocking a hopper, and your done. Just an idea.

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R Scott

pollinator

Posts: 4151

Location: Kansas Zone 6a

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posted 13 years ago

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I would LOVE a solution that would burn sawDUST through a rocket stove. Skip the part (time and energy) to convert the dust to pellets or logs.

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Joe Braxton

Posts: 320

Location: NC (northern piedmont)

posted 13 years ago

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While not technically a rocket, this is as good a way to burn sawdust as I've seen.

http://www.youtube.com/watch?v=jMdRRhVJorY

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