I-001-FI-011-EN
mml
● ● ● Particularity : a wood-fired boiler connected to a district heating (165°C / 17 bars) which provides domestic hot water over the summer.
The wood energy Trail
Heating the Mesnils Pasteur housing complex in the town of Dole with different energy sources • Population : 24,824 inhabitants, • Forest of Chaux : 20,000 ha (nearby).
Combining economy, environment and social action
Dole
France Jura Department
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Fuel supply
Since its construction in 1967, the Mesnils Pasteur housing complex in the town of Dole has had its heating needs covered by an
The fuel used is bark, collected from the sawmills of the whole Franche Comté region. Fuel delivery is the responsibility of a transport company. The fuel is received untreated, and is transformed on site and is then stored in a feeder silo of 400 m 3 which is enough for two or three day’s use at full capacity. It is also planned to supply the boiler with 1,200 tonnes of forest wood. The association AVENIR, providing work for the disadvantaged, has a wood shredder at its disposal and plans to collect wood from the nearby Forest of Chaux. After several months’ storage over the winter, the fuel will be delivered as and when needed in mid-season.
View of the fuel treatment plant
Photo AJENA
urban boiler plant. This boiler plant was equipped with three generators : one coal-fired (12 MW), one bi-fuel oil/natural gas (15 MW), and also an oil (15 MW). The town of Dole needed to invest in a new boiler with a smaller output to cover the summer period in comfort. The decision was taken to install a wood-fired boiler to diversify the energy sources used and to assure a constant supply of competitively-priced energy. The final choice of fuel was the use of bark, which is abundant in the area and is a low-priced source of wood energy.
The boiler
Programme of the Jura Department
Information on the community • Altitude : 280 m,
The chain has been designed to cope with a large variety of types of wood waste (bark, pallets, industry by-products etc.) The system screens, grinds and removes the iron from the wood delivered. The installation deals with 12,000 tonnes of wood per year, and guarantees the boiler a certain level of independence, since it means that several sources of wood can be called upon.
A self-operating boiler The boiler has an output of 3,200 kW, which is 17 % of the total capacity installed. It covers 36% to 48 % of the heating and hot water requirements of the complex. It works at full capacity from October to May and at the required rate over the summer. The boiler is entirely selfoperating, from the supply of fuel to the clearing of the ashes. The boiler furnace with mobile grates takes the fuel with a moisture content of up to 60% gross weight.Multi cyclones removes the dust from the smoke. The ashes are removed by a worm screw to a special receptacle. The boiler is also equipped with a system for limiting Nitrogen Oxide emissions.
© ITEBE- july 1999
Photo AJENA
The wood treatment chain
I-001-FI-011-EN
mml
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The wood energy Trail
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Diagram of the wood treatment chain and of the boiler plant
Fuel transfer screw Feeder screw Mobile grate furnace Primary air ventilation Secondary air ventilation Combustion chamber Post-combustion chamber Nitrogen oxide levels reduction chamber Heat exchanger Multi cyclones
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Information ITEBE - European Technical Institute for Wood Energy 28, boulevard Gambetta - BP 149 F-39004 Lons-le-Saunier Cedex Tel.+33 (0)3 84 47 81 00-Fax.+33 (0)3 84 47 81 19 E-mail: info@itebe.org - Web: www.itebe.org
Information on financing • Contractor : Town of Dole
ADEME (French energy agency) 13, chemin des Prés de Vaux F-25000 Besançon Tel. +33 (0)3 81 47 96 81-Fax. +33 (0)3 81 61 16 81
• Total cost of the investment : - Storage hangars, civil engineering, fuel treatment chain : 929,939 € inc. tax. - Wood-fired boiler and connections : 591,502 € inc. tax. - Studies, contracting, tests, insurance : 155,498 € inc. tax.
This factsheet was designed by AJENA as part of the Altener wood energy programme, financed by the European Union (DG XVII), the Jura Department (programme contractor), ADEME (the French energy agency), AJENA (Jura association for the promotion of renewable energies), ASEB (Swiss association for wood energy), and the Styrian Chamber of Agriculture (Austria).
Schmid France (manufacturer) 6, avenue de Valparc - F-68440 Habsheim Tel. +33 (0)3 89 54 97 93 -Fax. +33 (0)3 89 64 37 64
• Financial partnership as part af the Wood Energy and Local Development Plan : ADEME Franche Comté, the French Energy Agency for the Franche Comté region (31 %), The Jura Department (10 %) and the FNADT, the local development agency (9%). Photo AJENA
Grab arm for transferring the wood from the fuel treatment chain to the feeder silo
Chimney Point of departure for the heating network System controls cupboard Ash clearing screw Ash container.
ABP (fitter) 137, rue Henri Barbusse - F-92110 Clichy Tél. +33 (0)1 47 56 25 25 - Fax. +33 (0)1 47 56 25 02 SOCCRAM (Manages the heating system) Avenue Charles Laurent Thouverey - F-39100 Dole Tel. +33 (0)3 84 82 00 74 - Fax. +33 (0)3 84 82 56 98
For visits, contact : Ville de Dole Place de l’Europe - BP 89 F-39108 Dole Cedex Tel. +33 (0)3 84 79 79 79 - Fax +33 (0)3 84 79 79 80 To receive copies of the other factsheets in this series, contact : (see address above)
Editions Ground bark Steiermark
Programme of the Jura Department
Lons-le-Saunier - France
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© ITEBE - July 1999. Design : AJENA. Printed on 100 % recycled paper at
Delivery of the raw fuel Reception pits (2 x 90 m3) Automatic grab arm Fuel sifting flume Fuel transport bands Magnetic iron extraction Fuel screening Slow-speed grinder with cutting action Fuel pit between the grinder and the feeder silo Feeder silo Extractor rams
Photo AJENA
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