en.Wedoany.com Reported - The GeoBrie geothermal heating network in eastern Île-de-France, France, has officially commenced construction. Covering the Paris-Vallée de la Marne Agglomeration Community, the network spans 42 kilometers and will connect the municipalities of Emerainville, Roissy-en-Brie, Pontault-Combault, and Plessis-Trévise. GeoBrie, a wholly-owned subsidiary of Groupe Coriance, is responsible for the construction and operation of the network under a public service concession contract.

The first pipe-laying ceremony was held in Pontault-Combault, attended by representatives from the municipalities. This year, approximately 4 kilometers of pipes will be installed in Pontault-Combault and Roissy-en-Brie, with an additional 13.8 kilometers to be added next year. Work in Plessis-Trévise will begin in 2029, followed by Emerainville in 2030. The entire network is expected to be completed by 2034.

The central heating plant will be located at Nautil, between Pontault-Combault and Roissy-en-Brie. The plant will utilize hot water from the Dogger aquifer at a depth of 1,700 meters, combined with heat pumps, and will be equipped with a 28 MW gas boiler as backup energy. The GeoBrie heating network is expected to source 94% of its energy from geothermal power. Ultimately, the network will distribute approximately 116 GWh of heat annually, equivalent to the consumption of 12,000 households.

The project involves an investment of €107 million for the construction of a 42 km heat distribution network, a geothermal heating plant and production facilities, the installation of 200 substations, and connections for individual houses along the network.

The GeoBrie project benefits from extensive knowledge of the Dogger aquifer in eastern Île-de-France. A recent large-scale two-year study has concluded, helping to assess the potential for geothermal heating in western and southern Île-de-France, and contributing to the expansion of geothermal deployment beyond what is already Europe's largest and densest geothermal heating development zone.

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