"Wood, it is essential," announces a sticker on the door from the local to boiler. Behind this door purrs machine German patented green flame, driven by an automaton that handles the fuel supply brought forest platelets of the adjacent elevator by a screw without end and stops it when the temperature of the water circulating in pipes reaches 70 C. This is Christophe, the eldest of the three brothers Delacroix who resumed the Chazeaux family farm, in the 1990s, who was seduced by the principle of this boiler, to the point of install one home. Many farmers of the Doubs opt for fuel, timber, available, here at will. Even if, in the Department, only 56 of the resulting biomass of annual increment of forest would be exploited.
Step of heat loss

The farm of the Chazeaux is the only fuel a collective installation, via a network of underground or air depending on the distance. The facility heats indeed two remote homes of tens of metres, a building of operation of dairy farming and a workshop for the conversion of snails. Why "It is collective, it is interesting," provides Sylvain Delacroix. Associated to the boiler heat network is a system of ducts extremely well isolated (with a hull made of plastic and polyurethane insulation) equipped with two pipes: one for the start of the hot water, the other for the return of cold water. "There is not really of heat loss: just 1 degree on 150 meters...". . In the spring of 2004 for a total cost of 46.100 euros, 40 of Ademe and the Department grants installation has already helped the farmers, their families and employees to five winters warm, skipping the stage of the timber, which was free time when three buildings were still heated by small boilers to logs. Fuel "shredded wood" is perfectly suited to farms, once they are located in a wooded area. Farmers have the space needed in storage but also logistics: dump trucks, tractors and buckets. "We can be self-sufficient for most of our fields are surrounded by hedges that must be maintained." Cut wood in winter, and then the shredder transforms it into wafers. "Dry or still green wood is placed in a silo where it is naturally échauffera to 60 or 70 degrees for two to three months, releasing steam which the will down to 25 or 30 moisture", says Sylvain Delacroix. He did his calculations: "With the price of the market of platelets, this would be tantamount to 4,800 euros and compared to fuel oil, we would have 11,000 euros per year to produce the same amount of heat." Since wood is free, return on investment will be in seven or eight years.
This cheap and clean heating gives ideas this smart farmer and green which does not, one day, dry in barn Hay cut earlier in the season while it is usually harvested in June, at the time where maximum sunshine ensures a good drying but him losing a part of the protein. "It shall be more obliged to compensate purchased food, it will gain in autonomy and quality of hay".\