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Sign upJanuary 1, 2021
City of Velizy-Villacoublay (France)
Velizy-Villacoublay
The City of Velizy-Villacoublay in the Paris Basin wanted to use geothermal energy for its 19 km district heating networks – that were previously powered by gas and two cogeneration units – to cover more than 60% of the heat demand. They signed a 28-year contract with Engie for heat supply and upgraded the network to reach acceptable temperature and pressure levels for geothermal energy requirements. In 2022, Engie’s geothermal power plant of 18,2 MW was commissioned.
The system is projected to save around 22,439 tons of CO₂ annually compared to a gas-based solution, while providing sustainable heating for 12,000 homes, highlighting its significant environmental impact.
Heating in buildings is at the core of energy consumption. Thus decarbonise energy sources is crucial to reduce associated emissions. Geothermal district heating is defined as the use of geothermal sources to supply heat to a group of buildings through a distribution network. The main benefits of geothermal sources are provision of local, and flexible renewable energy. Even though there are plenty of geothermal sedimentary reservoirs to use, there is sometimes heterogeneities of geological properties that limited productivity. The goal is then to optimise the draining area and thus to increase the overall energy extracted from the ground. This multidrains technology steps up the efficiency of a geothermal solution.
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