Le show forum wood of Marvejols presents an automatic wood heating network in Lozère
Interview with Claude De Sousa, exhibitor at Forum Wood 2010: a heating network and a unique supply platform in Aumont-Aubrac
Commissioned only a few months ago, the automatic wood-fired boiler of SARL Tec ENR in Aumont-Aubrac heats, via an underground heating network, the buildings of SA Gémarin, the dryers of the Gaillard Rondino company, the multipurpose room, the offices of the Community of Municipalities, the gendarmerie, as well as two main residences.
Feedback on the implementation of this project with Mr. Claude De Sousa, plumber-heating engineer, who carried out the installation.
CCI: What is the origin of this project?
C.DS: This project was born following the request for repair of the heating system of the workshops and administrative offices of Gemarin and Gaillard-Rondino. They wanted a renewable energy heating system. So I offered them a common wood boiler where the idea of creating a central boiler with a heat network using as fuel their waste wood.
It was by asking for road authorizations for the works that the project aroused the interest of elected officials. It then took on another dimension by including communities in the project.
CCI: Can you briefly describe the heat network that you have put in place in 2009?
C.DS: The heat network is separated into two parts, a very high temperature part for feeding wood driers and the second part for heating supply of connected buildings.
CCI: What power does this boiler house represent? Is it operating at full speed today?
C.DS: The power of the wood-fired boiler is 1 MW, to date it operates at 80% of its capacity, because the gendarmerie is not yet connected. As soon as the latter is connected, it will operate at full power.
CCI: How is the supply organized?
C.DS: The supply and ensured by the related timber companies Gaillard-Rondino and Hermabessière. A supply platform was created near the boiler room. It consists of a storage shed which allows to have a dry and quality fuel in order to optimize the installation as well as possible, and of a tarred area allowing the storage of wood ready to be crushed. The platform is also covered with 1500 m2 of photovoltaic panels.
CCI: Is there a risk of a raw material supply disruption?
C.DS: No, because the needs of the boiler room are 1000 tonnes per year, while the Hermabessière and Gaillard-Rondino companies respectively produce 3000 and 6000 tonnes of wood residue and offcuts per year. Another sawmill also supplies the platform, this is Sarl BDL de Serverette. There is therefore still untapped production potential.
CCI: So the supply platform can be used to sell forest chips?
C.DS: Absolutely, this is already the case. The platform currently produces 3000 tonnes of wood chips (in addition to the needs of the installed boiler room). These 3000 tonnes are crushed by the company Bois Energie de la Canourgue, whose manager is Mr. Régis Clavel. The plates are calibrated, dried and dusted, which allows to obtain a fuel that can be sold to individuals with small boiler rooms.
CCI: What are the difficulties that need to be faced to put such a project in place? What are the advantages ?
C.DS: The main difficulty is the supply of quality energy resources. It is also essential that there is proximity between the boiler room and the heated buildings, otherwise the project may be more complex to implement, energy intensive and of little ecological and economic relevance. The advantages are the stability of the cost of energy, in the long term, and the existence of financial aid for the realization of automatic wood-fired boiler projects.
CCI: So you have benefited from public competitions. What are they ?
C.DS: We have benefited from financial assistance from the Communities (Europe, State, Languedoc Roussillon region).
CCI: In the end, is this achievement transferable elsewhere?
C.DS: Yes of course. A feasibility study is still strongly recommended for projects of such magnitude, it will indicate if the realization is necessary and especially profitable for the potential client (s).