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 Post subject: Wood, calorific value, weight, and how long to store
PostPosted: Tue Apr 12, 2011 12:59 am 
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Now that you are thinking about the summer, and forgetting about winter fires etc, dont get lulled into a sense of false security, and forget about next winter, now is the time to start thinking about sorting out your wood pile, sounding out the prices of wood for delivery before next winter and also the same for the winter after that, because the different woods for burning, need at least 1 year drying time, and some need 2 to 3 years drying time before burning

Hardwoods (fully air dried)


Ash.Weight per m3 in kg 674 Gross heat value kW/kg (btu/lb) 4.1 (6,350) % Moisture when green 35 Seasoning time in summers 1

Beech. Weight per m3 in kg 690 Gross heat value kW/kg (btu/lb) 4.3 (6,700) % Moisture when green 45 Seasoning time in summers 1-2

Birch. Weight per m3 in kg 662 Gross heat value kW/kg (btu/lb) 4.1 (6,350) % Moisture when green 45 Seasoning time in summers 1

Elm. Weight per m3 in kg 540 Gross heat value kW/kg (btu/lb) 3.6 (5,600) % Moisture when green 60 Seasoning time in summers 2-3

Oak. Weight per m3 in kg 770 Gross heat value kW/kg (btu/lb) 4.5 (7,000) % Moisture when green 50 Seasoning time in summers 2-3

Poplar Weight per m3 in kg 465 Gross heat value kW/kg (btu/lb) 2.6 (4,100) % Moisture when green 65 Seasoning time in summers 1


Softwoods

Pine/Fir Weight per m3 in kg 410 Gross heat value kW/kg (btu/lb) 2.6 (4,100) % Moisture when green 60 Seasoning time in summers 1

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 Post subject: Re: Wood, calorific value, weight, and how long to store
PostPosted: Tue Apr 12, 2011 9:39 am 
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Very handy Aide-Memoire Peake.

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 Post subject: Re: Wood, calorific value, weight, and how long to store
PostPosted: Tue Apr 12, 2011 9:45 am 
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The local canue club have notified us that they are going to clear out the river which banks onto our lower field - which will result in possibly a dozen fallen trees that have been blocking part of the river, being left in our field for our use. I wonder how long they'll take to dry out?!!! They've only been in the river for, ooh, about 5+ years!!

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 Post subject: Re: Wood, calorific value, weight, and how long to store
PostPosted: Tue Apr 12, 2011 11:54 am 
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Bayleaf wrote:
The local canoe club have notified us that they are going to clear out the river which banks onto our lower field - which will result in possibly a dozen fallen trees that have been blocking part of the river, being left in our field for our use. I wonder how long they'll take to dry out?!!! They've only been in the river for, ooh, about 5+ years!!


Cut them up and split them if large logs, and let them drain first (say 6 months), then stack them so that the wind can get to the logs to help dry them for a year, then under cover, but not too tight so that the wind can still help to remove any moisture, for another year before burning them, looks like you will be having some good warming fires for the winter of 2013/14

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 Post subject: Re: Wood, calorific value, weight, and how long to store
PostPosted: Tue Apr 12, 2011 12:24 pm 
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Wahay! :-bd

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 Post subject: Re: Wood, calorific value, weight, and how long to store
PostPosted: Sat Nov 19, 2011 12:57 am 
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How long before the wood deteriorates?

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 Post subject: Re: Wood, calorific value, weight, and how long to store
PostPosted: Sat Nov 19, 2011 11:58 am 
FranknCarmen2 wrote:
How long before the wood deteriorates?


As soon as you burn it! Hope that helps :)

**************

I have a list showing the calorific values of various woods - see below, the list in descending order of value, compared with the "best" which is Charme.

Charme.
Chene -1%
Frene -8%
Erable -9%
Bouleau -11%
Orme -16%
Saule -29%
Hetre -29%
Aulne -33%
Tremble -33%
Tilleul -33%
Peuplier -33%


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