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The City is aware of the necessity to protect its environment which participates in its own prosperity. Political actions in favor of sustainable development has been set put, emphasizing the strong political will of local authorities on this issue. As a major player in the Local Climate Plan since 2004 and as Covenant of Mayors member since 2008, the city of Grenoble is committed to reduce energy consumption, encourage the use of renewable energies, promote social solidarity, set up alternative forms of transport and develop Environmental, Architectural and Urban quality. The main objectives of Grenoble Local Climate Plan, launched in 2004, recasted in 2009, remain to divide local greenhouse gas (GHG) emissions by factor 4 by 2050.
In Grenoble, between 2005 and 2012, energy consumption decreased by 3.7% and GHG emissions were reduced by 17%. The final energy consumption per Grenoble inhabitant in 2011 was 19.7 MWh.
To go further and to offer a future and smart city to inhabitants, Grenoble has presented its Éco-cité project on the north side of the town. The Grenoble innovative concept of smart integrated city has been selected, with 13 other advanced Cities in France by the French Government in 2009, to receive grant on some innovative actions. Among inspiring cities, Grenoble is at the first place, because Eco-cité project is gathering private and public stakeholders around demonstrations projects for which political decisions have already been taken in the fields of mobility, building and energy. The objective is to transform the Éco-cité area into a positive energy and carbon neutral district.
Retrofitting private co-owned buildings and social housing
The city will focus on existing dwellings with the objective to reach the level of current thermal regulation for new buildings : BBC renovation level. Social housing and private multi-family condominiums are an effective lever to reach for 2020 objectives of GHG reduction in Grenoble. The City will develop a retrofitting intervention strategy based on buildings technical and architectural typologies as well as on the social and economic conditions of the families. In Grenoble, 500 dwellings will be retrofitted, leading to a saving of 9,600 tonnes of CO2 per year.
Creating a low temperature heating and cooling network
The new buildings of the area will be energy efficient. The objectives of the innovative thermal loop are :
- adapt the heat of the grid to this new energy efficient buildings needs, by designing a very low temperature district heating loop in order to avoid heat losses compared with the traditional Grenoble’s district heating
- improve the overall district energy efficiency by connecting his loop to a heat recovery system form sewage water coupled with heat pumps
- demonstrate seasonal storage solutions with dry geothermal boreholes
CO2 reduction target is 1,300 tonners per year.
Saving and monitoring energy flows
The objective is to monitor and manage all the energy and water flows in order to save energy and assess systems and policies efficiency with a multi-energy territorial monitoring system :
- implement innovative solutions to optimize the electric system,
- demonstrate a smart management of various energy flows, providing an optimized and rational use of local resources,
- demonstrate a multi utilities vision, through building an innovative multi-energy real-time territorial monitoring system, with an user-friendly approach for citizens.