Par Gilles Patry
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The future headquarters of Manche departmental energy association (SDEM 50), currently under construction in Agneaux, will be a concentrate of building technologies implementing solutions forrenewable energies.
On the roof, solar panels will produceelectricity for the building and the heating of the premises will be ensured by a geothermal system coupled with a network of heat capture in the pavement of the car parks.
All of this will most certainly allow us to produce more energy than we consume.
The SDEM intends to resell electricity to EDF. The innovative Power Road process was developed by the company Eurovia. The system, integrated into the layers of the road network, is a heat exchanger of 200 m2consisting of tubes in which a heat transfer fluid circulates, connected to heat pumps.
From 7°C, under the action of solar radiationthe energy thus captured will supply the heating system, in addition to the geothermal wells, and thesummerit will be stored in the ground to be returned in winter.
“Geothermal booster”
“It’s a geothermal booster”, summarizes Aurélien Gallé of Eurovia. “The Power Road raises the temperature of the ground to increase the performance of heat pumps. The system reduces “the electricity consumption of heat pumps by 20%” and the whole system reduces emissions by “88%”. greenhouse gas compared to gas or oil.
The cost of this complementary installation to geothermal energy by heat capture wells is €62,000. The future SDEM headquarters will be the first building to be equipped with this technology in the Channel and the fourteenth in the world.
5 million euros
In NormandieEurovia has already deployed this innovation in 2019 on a property complex of 61 housing To Fleury sur Orne (Calvados). The company intends to develop it with communities to reduce their energy billsespecially for swimming pools, large energy-consuming establishments. A dozen sites should be in service in France by the end of the year.
With its new “autonomous and energy-efficient” headquarters, the overall cost of which reaches 5 million eurosthe SDEM will achieve €100,000 in energy savings per year by leaving the former Saint-Lô courthouse, a thermal sieve belonging to the Department. It will move into its new premises in August 2023 for a inauguration scheduled start 2024.
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