The heating and cooling network of Paris-La Defense (Ile-de-France) continues its transition to renewable energies by integrating agro-pellets derived from agricultural residues • The Metropole of Clermont Auvergne (Auvergne-Rhône-Alpes) enhances their district heating offering by joining and extending current networks • A biomass central have been installed behind the Maillot hospital in Val-de-Briey (Grand Est) to extend the heating network to additional buildings • Read about the news in sustainable heating and cooling in the June news update from France
The energy operator Idex ensures the production and distribution of heat and chilled water in the business and residential district of Paris-La Défense, on concession contract until 2032. The heating and cooling network is part of a sustainable development approach and previous transformations have involved a shift from coal to fuel oil, to partially using biofuel. Idex has now launched the next step of developing a greener network by integrating agro-pellets, derived from agricultural residues (green waste, rapeseed, corn straw, etc.) to fuel the previous oil boiler.
In total, two out of the current four oil boilers will be adapted to operate on agricultural residues by Oct 2022. This new installation is partially financed by funds from the DH network’s union Généria and will enable the district to achieve a renewable energy rate of 60% and reduce its CO2 by 54,000 tons per year.
Four DH networks are in place since 2017 and in 2020, the Metropole opted for a 15km long extension as well as an interconnection between two of the networks. The latter will help optimize the heating of the Croix-de-Neyrat network by redirecting part of the energy production to the Gauthière network. The extension aims to extend existing service areas, supplying additional energy to 4,000 homes. The previous two networks provided heating to more than 8,000 housing units.
Energy providers will be Dalkia (Clervia) and Engie Solutions (ECLA) are responsible for the project’s implementation and management under public concession contract. The works started in March 2021 to be finalized in 2023. The total cost of the work is estimated at 15 M EUR (excl. taxes) whereas 6.5 M EUR is financed by ADEME. The networks will ultimately have a renewable energy rate of 75% after the extension.
The town’s Gendarmerie and Semi-Liberty Center are now being connected to the heating network where the intercommunal union (responsible for the Rivière Woigot contract) is taking advantage of the works by simultaneously installing new water pipes for drinking water. The city of Briey’s municipal library and public administration office are also being connected to the DH network, where works started in May 2021.
Dalkia (Eurovia) is responsible for the new project and estimates that the heating of the future network will be produced at more than 77% from renewable energies, with the help of the new wood biomass boiler with an energy production of 2.5 MW (megawatts). The DH network has a temperature of maximum 109°C and will have a wood consumption of 5,500 tons per year.
Sweden is at the forefront of decentralised heat networks technology. Our aim for “Sustainable Heating & Cooling by Sweden” is to facilitate knowledge sharing between British, French and Swedish stakeholders and develop and encourage environmental and economic best practice.
To find out how we can help you and your organisation, please contact our London or Paris-based “SHC” teams. We can introduce you to leading consultants, suppliers of technology and services who will be pleased to share know-how of the development of sustainable heating & cooling solutions.