Wood Furnace Ideas

Wood Furnace Ideas

PostBy: John27elec On: Wed Jan 04, 2012 8:11 pm

Hi guys wondering about making a wood furnace ( design and have built for me ) wondering if any one has any exsperience in secondary combustion ideas or pre-heated combustion air if its worth my time setting up or just use standard old rememdies ?
John27elec
 
Stove/Furnace Make: Stove
Stove/Furnace Model: Hitzer 30-95

Re: Wood Furnace Ideas

PostBy: whistlenut On: Wed Jan 04, 2012 8:28 pm

If you think you are re-inventing the wheel, perhaps you need to sit down with an adult beverage and re-think your proposal.
Look over the AHS gassification units, and all the European Gassers.....you are stumbling into a minefield, but best of luck to you anyway! .
If you have PLENTY of cash floating around, why not goggle GARN.COM.......Shafer.com......Royall.com......Central Boiler.com, etc.

This is a coal forum, however I'm sure everyone here burned wood at one time or another in their past. We know wood burning also, but for reasons publicly stated here, we are "Black Rock Junkies", but support any form of staying warm that doesn't involve sending your hard earned money overseas, and does benefit American Companies and products. I don't want you to think that you are a 'Cobra slithering in a den of mongoose's, it is not that way. We are here to provide advice, and how you use it is your choice. PS: There are some extremely competent individuals on this forum, so consider yourself amongst friends!
PPS: Ever think of coal as a fuel you could learn to like? You sure seem to have a thirst for knowledge....and you are in the right place to get just that. Ask away.........after you enjoy that 'adult beverage'............

:bang: :whistle: :stretcher: :cheers:
whistlenut
 
Stoker Coal Boiler: AA130's,260's, AHS130&260's,EFM900,GJ&VanWert
Hand Fed Coal Boiler: Franks Boiler,Itasca415,NYer130,Van Wert
Hot Air Coal Stoker Furnace: Yellow Flame
Hot Air Coal Stoker Stove: Alaska-4,Keystoker-2,
Hand Fed Coal Stove: Alaska,Gibraltor,Keystone,Vc Vigilant 2
Hand Fed Coal Furnace: Van Wert, NYer's, Ford,Jensen.
Coal Size/Type: Rice,Buck,Pea,Nut&Stove
Other Heating: Oil HWBB

Re: Wood Furnace Ideas

PostBy: John27elec On: Wed Jan 04, 2012 8:37 pm

Thanks for that ... but i do burn coal i have a Keystoker A-120 Furnace and i love it ... just thinking of playing around with a wood furnace i have an unlimited supply of wood .. was thinking of using it to heat my garage .. i have the coal furnace to heat the house and my attached garage. Just looking for ideas on the wood furnace and it says in this section that wood is on this board index .. but no big deal
John27elec
 
Stove/Furnace Make: Stove
Stove/Furnace Model: Hitzer 30-95


Re: Wood Furnace Ideas

PostBy: DOUG On: Wed Jan 04, 2012 10:25 pm

Here is a link to some interesting wood burning stove research papers.
http://www.aprovecho.org/lab/pubs/rl/stove-design/doc/18/raw
This link is broken, either the page no longer exists or there is some other issue like a typo.
I think that you'll find some ideas here for your project. :idea: :)
DOUG
 
Stove/Furnace Make: CHUBBY, D.S.MACHINE BOILER
Stove/Furnace Model: CLAYTON 1600

Re: Wood Furnace Ideas

PostBy: franco b On: Thu Jan 05, 2012 8:07 pm

The trouble with wood is that when heated it releases half its potential heat as gas. If you don't burn that gas it exits the stove as smoke. So large amounts of gas that if you succeed in burning need large or more efficient (blower) heat exchange surfaces to absorb it if high stack temperatures are to be avoided. Heated secondary air at the right place.

When the charcoal stage is reached it behaves more like coal so air placement and requirement again change.

Any stove you build or have built will really be a prototype because you will find that there will be areas that work better if changed. Very hard to build anything as good as it can be first shot out of the box. Unless you can build something better than what exists it does not make sense to do it unless cost is much lower than buying.
franco b
 
Hand Fed Coal Stove: V ermont Castings 2310, Franco Belge 262
Baseburners & Antiques: Glenwood Modern Oak 114
Coal Size/Type: nut and pea

Re: Wood Furnace Ideas

PostBy: John27elec On: Thu Jan 05, 2012 9:27 pm

Well thats the thing cost ... I really dont care to spend like 8 or 9,000 dollars on one ... so i would like to take my ideas i have learned and read online about and have one built since a family member of mine owns a fab shop and basiclly just cost me materials. And ive read about secondary air combustion and gasifiers just seeing if there was any ideas out there floating around .
John27elec
 
Stove/Furnace Make: Stove
Stove/Furnace Model: Hitzer 30-95

Re: Wood Furnace Ideas

PostBy: watkinsdr On: Thu Jan 05, 2012 9:48 pm

Sell your wood and buy coal. :D
watkinsdr
 
Stoker Coal Boiler: AHS S260 Boiler

Re: Wood Furnace Ideas

PostBy: DOUG On: Thu Jan 05, 2012 10:59 pm

I recently purchased and installed a D.S.Machine wood boiler. It is basically a 24" round cylinder for it's combustion area, but the unique feature, that I sort of like, is the after burner secondary air tube they placed in the top of the cylinder. It appears to be a tube inside a tube running the length of the firebox, with holes drilled out on each side for the preheated secondary air to ignite the gas from the wood. It must work well because it flames the gases nicely. Just food for thought.

As for low cost garage wood heater, it really is hard to beat a double barrel stove. I've built many over the years, but if you want one that will last, make it from used stainless steel barrels. I'm sure with your connections to a metal fab shop, you could build a nice low cost steel wood stove/furnace. You just need to decide what it is that you want as the end result and calculate from there. I've found some interesting designs going through old patents. Maybe you could get some good ideas there also to incorporate into your project?
DOUG
 
Stove/Furnace Make: CHUBBY, D.S.MACHINE BOILER
Stove/Furnace Model: CLAYTON 1600

Re: Wood Furnace Ideas

PostBy: John27elec On: Fri Jan 06, 2012 7:42 pm

now with your double barrell stoves , heard they burn out pretty easy ? i was going to line one with fire brick and sand see how well that works.
John27elec
 
Stove/Furnace Make: Stove
Stove/Furnace Model: Hitzer 30-95

Re: Wood Furnace Ideas

PostBy: ONEDOLLAR On: Fri Jan 06, 2012 8:28 pm

John

The double barrel stove will serve you well.

I know a guy who took a 30 gallon and placed it inside the 55 and this the 30 was the burn chamber. He packed sand between the 2 barrels. He also lined the 30 with firebrick. This was 15 years ago and the stove is still going strong. For heating your garage you can't go wrong by doing this. At least that is my thoughts!
ONEDOLLAR
 
Hand Fed Coal Stove: 2014 Chubby Prototype
Baseburners & Antiques: Crawford #2 Base Heater
Coal Size/Type: Nut/Anthracite

Re: Wood Furnace Ideas

PostBy: rockwood On: Fri Jan 06, 2012 10:16 pm

rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)

Re: Wood Furnace Ideas

PostBy: DOUG On: Fri Jan 06, 2012 10:22 pm

Check out the 55 gallon 304 stainless steel barrel heat exchanger I made for my D.S.Machine wood boiler. D.S.Machine Wood Boiler

I was able to capture a good bit of heat which would have been wasted up the chimney with this. It gives of enough heat to keep the basement comfortable, plus I was able to place a pan of water on top for some humidity. The barrel kit feed door makes for a easily accessable clean out too.

The double barrel stove is a really simple low cost heat machine with fairly long burn times. Fifty pounds of sand placed in the bottom barrel with fire bricks on top of the sand keeps a nice hot bet of ashes for a quick start recharge too.The heat is quick and hot. Although realistically the used steel barrels I've used in the past only gave me 3-5 years before the barrel got thin. Using the 30 gallon inside a 55 gallon barrel with sand I'm sure would greatly increase the life expectancy, but probably at a cost of slow start up heat, but longer radiation without a fire trade off.

The bung holes offer an easy way to add a threaded black pipe for combustion air and secondary air. There are endless possibilities with building barrel stoves. The offer cheap fabrication with tons of heat potential and give you the satisfaction that you built it yourself. :idea: :)
DOUG
 
Stove/Furnace Make: CHUBBY, D.S.MACHINE BOILER
Stove/Furnace Model: CLAYTON 1600

Re: Wood Furnace Ideas

PostBy: Cyber36 On: Tue Jan 17, 2012 2:34 pm

Most decent wood stove already have secondary heat exchangers. Check out the Logwood.........
Cyber36
 
Hand Fed Coal Stove: Marathon/Logwood