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What I learned about wood today I think...

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by ddahlgren, Feb 3, 2013.

  1. ddahlgren

    ddahlgren Feeling the Heat

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    Ok realizing my quest for work may turn out to be a bust and not wanting to work in the shop today i played a bit. . Playing with the last wood I received about a month ago that was cut to 8 foot rounds let sit for 2 years then split a month before I received them. I am not sure if that is the truth but what i was told. I measured the MC before bringing into the house and 22%. They sat in the same room as the stove for 2 weeks and measured 14.5 on the outside. Split one and 25% on the inside. Put the 2 pieces on a decent bed of coals and burned for 45 minutes caught fairly well with minimal smoke. Put the un-split one in next with a similar bed of coals took off with a tad more smoke and burned well at first then kept asking for more air. The difference was a stove temp of 520 split and 450 un-split. My next experiment is to get data from a piece of the same batch that has spent it's life outdoors and get a surface reading and interior reading and see how it burns and will report back with how that went and I hope enough information the get some ideas on how you might burn marginal wood if given no choice.

    The other thing I need to get done is get the probe stack thermometer mounted and unlike conventional wisdom I am going to mount it about 6 or 7 feet off the floor to see if it looks hot enough for the flue gases hot enough to get out of the chimney above 250 degrees the number i found on the net as below it you will get creosote.

    I will report back with results! Sometimes it sucks being an engineer you just keep wanting to know 'why'...LOL

    Dave

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  2. ddahlgren

    ddahlgren Feeling the Heat

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    Ok an hour and one half in the center wet wood is 27% and outside up 2% as well Hmmm water migrating to equalize the water content?
  3. ddahlgren

    ddahlgren Feeling the Heat

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    At 2 1/2 down to 25 on wet side and 17 on dry tossed into a 400 degree stove top bed of coals and took off instantly.
  4. topoftheriver

    topoftheriver Member

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    And the bottom line??????????
  5. ddahlgren

    ddahlgren Feeling the Heat

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    Ok last load sort of burned but not well takes full air to keep it going. so what i think I have learned. There is no substitute for time getting wood seasoned. With a split with 4 to 5 inches on a side inside is at least 10 % wetter than the outside after 3 months. Storing wood indoors for a week in a low humidity area is good for about 3% less overall possibly more. Unseasoned wood left outside is useless in under a year. oak at least. Given enough air almost anything will burn but heat is optional. If in a jam split fine and leave in a warm place for a week or two and you stand a chance to get it to burn and make some heat. Fine being no bigger than a modern 2 X 3 then stack like kindling so no long burn beyond an hour possible. I do not claim to be any sort of expert but this a set of experiments to satisfy my curiosity and what I saw and what i thought it told me. I am not sure if useful to anyone but taught me a lot.
    Dave
  6. ddahlgren

    ddahlgren Feeling the Heat

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    See next post..

    What i missed is the room the stove is in is 90 and the first floor 76 so lacking anything ood it might work but scrub chimney often!
  7. bmblank

    bmblank Minister of Fire

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    Remember sample size. Especially figuring moisture content. I'm willing to bet moisture content between multiple splits of the same 8 foot section will vary 10% or more.
  8. bmblank

    bmblank Minister of Fire

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    Another engineer here. It makes stuff so hard. Yesterday i was laying tile to look like a random pattern... I probably spent more time trying to figure out where each tile goes than the actual laying of the tile.
    gyrfalcon likes this.
  9. ddahlgren

    ddahlgren Feeling the Heat

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    And i bet you are 100% correct I just picked pieces sitting next to each other and the best i could do.
  10. Jon1270

    Jon1270 Minister of Fire

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    Keep in mind that your moisture meter is affected by temperature, and probably calibrated for 70F. If the wood is cold, the reading will be artificially low.

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