Wet wood is bad fuel: they are hard to ignite, emit little heat and stronger pollute the chimney with soot. And if not properly stored, even the dry wood will dampen and spoil.
Then tell how to dry and store firewood.
What you need to know about humidity and wood
Moisture content indicates the amount of moisture contained in the wood. For example: one hundred pounds of wood humidity of 25% contain 25kg water and 75kg of wood.
The moisture content of the wood is divided into several categories:
Alloy: 80% and above. This timber, which is floated on the river or in the water. Svejesobranna: 45-80%. Wood that has been recently felled and still contains its natural moisture. Air dry: 20 to 45%. Wood, naturally dried in the open air. Room-dry: 7 – 20%. Wood, a long time in a warm and ventilated area or is kiln dried as briquettes. Absolutely dry: 0%. Wood that has undergone a thermal processing at high temperature. The optimum moisture content of the wood, which can be achieved by drying in the home is 15-20%. Dry stronger is possible, but impractical. The cost of forced drying and storage will be higher than the result obtained.
As the moisture content of the wood affects the calorific value
the lower the moisture content of the wood, the higher the dissipation. This is illustrated by the calorific value of oak firewood: oak svejesobranna humidity of 60% emit 2.25 times less heat than at a humidity of 20%.
Moisture content, % calorific Value, Kcal/m3 10 3321 20 2916 30 2511 40 2106 50 1701 60 1296 70 891
Recommendations for the storage and drying of wood
1. Proc/stacking firewood in a woodpile
The minimum period of drying depends on the month of stacking firewood in a woodpile.
January February March April May June 220 190 140 120 100 80 July August September October November December 310 300 280 270 250 240 When stacking firewood in a woodpile in April, they will dry out for 120 days and will be ready for the upcoming heating season. But wood harvested in July, dried over 310 days and will be ready only by next winter.
If you buy the wood and do not check their humidity hygrometer, then treat them as svejesobranna: buy in advance and allow time to dry.
2. Dry firewood in bulk
Before you lay down the wood into the pile, leave them in bulk on the open ground for a few weeks. Due to the large distances between the logs and the constant circulation of air the wood will dry out faster.
3. The storage location
It is considered that the best place for wood storage – a garage, shed or other enclosed space. This is true, if the room is aired regularly. Ventilation is critically important for quality drying of wood. Otherwise, the wood will mold and rot.
Optimally store the wood in the woodpile with a canopy for protection from snow and rain. Usually a woodpile built along the wall of the house or fence, which serve as the rear wall and provide structural strength. The front wall need to leave open, to the wood the air to flow freely and circulate between the logs.
4. Do not put wood on the floor
First, it will inhibit air circulation. Secondly, firewood nourish moisture from the floor. Stack firewood on a special Foundation of the cross beams, pallet or bricks. So you will ensure good air movement from the bottom-up and protect the wood from moisture.
5. Lay the wood perpendicular to
If possible, each following row of the wood perpendicular to the previous place. So the wood will take up more space in the volume, but you will improve air circulation between the logs and to speed their drying, without reducing the structural strength.
6. Cut the wood along
The wood dries unevenly, which is evident from the conducted my experiment with a hygrometer and several samples of wood.
Example 1: a branch of apricot, storage life 8 months
Humidity at the ends of 14.4%. Wood is not svejesobranna, well dried and ready to use. But the humidity is the same branch bark is 53.7%. Despite the fact that the period of drying of this small branch for 8 months.
Example 2: svejesobranna wood
Humidity at the ends of 51.5%, which corresponds to svejesobranna wood. Humidity Cora – 79%.
Conclusion: the bark "encapsulates" the wood and prevents moisture to evaporate. If you are using a wood with a round shape, then chop them lengthwise into two or four pieces to the sides was peeled and well dried up. published