Firewood

[Grelinette]

In fact, the ancient circles are good those in the center of the trunk !
(my hypothesis that a tree trunk grows through its center is therefore false)

After the poetry of the blossoming of the rose (my link above), here is the tree rings music player!

German artist Bartholomäus Traubeck developed 'Years', a record player that is capable of reading the rings of a sliced ​​tree trunk and translating them into musical notes. A Playstation Eye camera, attached to the turntable arm, collect information about the color and texture of the wood, then this data is transmitted to a computer and translated into piano notes through the Ableton Live music sequencer software. So the music will be different depending on whether it is a slice of oak, maple, walnut or beech. "

When is the musical wood stove? ...

[Christophe]

In fact, the ancient circles are good those in the center of the trunk !
(my hypothesis that a tree trunk grows through its center is therefore false)

Bin voui jte a di plus hu !!

Not bad the "sylvimusic"

https://vimeo.com/30501143

[The shadow]

I did not take the time to thank the members who provided us with such beautiful photos, a real feast for the eyes and hat for the ideas of implementation
Thank you for sharing

[izentrop]

Similarly, Willow (4.1), Work (4.3) and Poplar (4.1), which are very soft and very light woods, seem to me to have very high calorific values, always in comparison with Oak ... How to explain these values ​​?

Good note greli!

Willow, work and poplar are very bad firewood! It's well known!

Wiki may give the PCI "0% RH" (ideal therefore accessible only in the laboratory ??)?!?

Yes but as it is sold in
volume...

(25% humidity)
Species Average mass of stere "PCI" (kWh / stere)
Charme 400 to 500 kg 1-520
Oak 380 to 480 kg 1-440
Beech 350 to 450 kg 1-310
Pine 300 to 400 kg 1-230
Fir 250 to 350 kg 1-035
https://fr.wikipedia.org/wiki/Bois_%C3% ... alorifique

[Christophe]

Ah yes it is bad in the collective imagination: water woods are bad in volume but not in weight!
Good note izentrop!

The same wiki page gives the PCI at 15-17% RH and the birch is very well classified!

Calorific values ​​of wood species (data for two-year-old dry wood with a residual moisture of 15 to 17%)

(kWh / kg) Gasoline Calorific value
(kWh / kg)
Maple 4,1
Birch 4,3
Beech 4,0
Oak 4,2
Alder 4,1
Ash 4,2
Spruce 4,5
Pine 4,4
Larch 4,4
Poplar 4,1
Robin 4,1
Fir 4,5
Elm 4,1
Willow 4,1

Source: Emmanuel Carcano, #Bibliography, p. 97

Finally as long as the wood is dry it is kif kif and it is necessary to retain an average value of 4.2!

Because we burn branches where the trunk is not quite the same.

Birch bark is used to make tinder: it contains hydrocarbons.

A bit like the sap of conifers, very energetic.
This explains their ranking in the lead.

[izentrop]

Birch is excellent, easy to split, but don't forget a trunk that has fallen to the ground, because it decomposes very quickly if not dried out quickly.
You can find tinder from a mushroom https://zone.biblio.laurentian.ca/bitst ... ologie.pdf

By opportunity I mainly burn grisard, very heavy to handle, because waterlogged and very hard to split but after 2 years of drying, it is feather and it burns very well.

[izentrop]

Finally as long as the wood is dry it is kif kif and it is necessary to retain an average value of 4.2!

For a fair sale, wood sold dry with a moisture content of less than 10% guaranteed, should be sold by weight and not by stere.

[Christophe]

For a fair sale, wood sold dry with a moisture content of less than 10% guaranteed, should be sold by weight and not by stere.

Exactly, the concern will be to certify the humidity rate in each log since wet wood weighs heavier ... and then the man is so "clever" (clever biblical version) ...

[izentrop]

You're right, let's leave the bases of calculation as they are.
So we can negotiate unsaleable "bad wood" at the best price

[chatelot16]

the PCI per kg does not characterize the practical quality of firewood

it is rather the volume that makes its cost, not only because the habit is to sell it by volume, but because volume matters more than weight for transport and storage

practical quality of good oak-type firewood: it dries well and does not take up water at the slightest rain

bad example: poplar: it burns well when it is dry, but at the slightest exposure to rain it is a sponge and it hardly dries