1. Welcome to Grenoble « Sustainable
city »
From the first Eco-Districts
to the EcoCity
Dr Xavier NORMAND
Project manager « Sustainable city »
City of Grenoble
NET ZERO CITIES CONFERENCE, 2013

2. Grenoble in brief
Main city of the French Alps
- City : 160,000 inhabitants
- Metropolis : 400,000 inh.
- Urban area : 700,000 inh.
#5 in World's 15 Most Inventive Cities
according to

3. The « Grenoble Facteur 4 » action plan
a framework for city planning
2008
• adoption of the EU Climate and Energy Package (3x20),
Grenoble is part of the first signatories of the Covenant of Mayors
• the « Grenoble Facteur 4 » 32-action plan was launched by the newly elected
municipality as the framework of an integrated environmental policy including
the objective of dividing GHG emissions on the territory by 4 in 2050 :
• Actions deal with thermal improvement of buildings, energy efficiency,
development of renewable energies, clean and soft mobility, natural
ressources, education ; the list was fixed for the 5-year mandate
• An observatory for GHG emissions and energy consumption has been set up
• Progress is monitored on a monthly basis by a group of Deputy Mayors, with
a debate every year in Town Council
• It includes an « eco-citizen » participative program
It should be extended in 2014 at the « Metropolis » level

4. Grenoble Facteur 4: energy and GHG
emission observatory

5. 2001-2011: Eco-districts 1.0
Eco-districts:
-Towards energy self-sufficiency :
. positive energy building
. gas-fired cogeneration
- Urban transport
- Social and functional mix
- High environmental quality
- Project follow-up (incl. support and training for the
building companies) and district monitoring
Grenoble was part of SESAC (Sustainable
Energy Systems in Advanced Cities), a
project of the CONCERTO European
Program (cf. www.concerto-sesac.eu),
together with Växjö (Sweden) and Delft (the
Netherlands)

6. Eco-districts are a major step on the path to sustainability:
- De Bonne district won the first "Grand prix EcoQuartier" in 2009 and became the matrix for all
new urban planning projects
- High-energy performance buildings (BBC) became the "norm" in Grenoble, especially for
social housing, thanks to a strong commitment for quality of building companies; it is now the
standard for all buildings in France (RT2012, new thermal regulation => 50 kWh/m2/year)
- High Environmental Quality standards are used for all new projects

7. The step further, the EcoCity

9. Working on the city scale
The Presqu’Ile district
including the « GIANT » innovation campus
De Bonne district

10. Welcoming inhabitants
into the innovation campus
Christian de Portzamparc
Architecte Urbaniste

11. INDUSTRIES /
RECHERCHES
Integrated urban design
LOGEMENTS
COLLECTIFS
CENTRALE
PRODUCTION DE
CHALEUR
BUREAUX
PROCESS
PARC DE SONDES
GEOTHERMALES
… a systemic approach

12. Integrated urban system
Living in the EcoCity
Vertical gardens : town
houses, mountain views,
optimized thermal
performance
30 kWh/sqm/yr total
energy consumption
with limited extra-cost
Smart grids :
- remote control
electrical equipement
- multi-fluid / energy
monitoring display
Mobility system :
- no private parking
- real time information
- multi-modal « mobility
centers »
Mutualized rooms
and open space at
city block scale
Low temperature
reversible heating &
cooling loop

13. New mobility strategy
Moving in and around the EcoCity
Step 1
Mutualized management of
parking (residents / workers / …)
All parking places under public
control : « Mobility House »
Step 2
Offer convenient, moderatecost, easy to use mobility
solutions
« Mobility Pass »
Step 3
Substitute individual vehicle by
shared vehicles
Complete public transport with carsharing and last-mile solutions in
the « Mobility House »
Step 4
Switch to hybrid / electrical cars
with solar power supply and
smart management of batteries
Offer easy charging facilities
(at home / at work)

14. Energy management
Experiencing a positive energy district
Between the traditional centralized production model
and the new theories of individual energy producer-manager,
find the relevant scale : the positive energy district
100% renewable electricity, managed by the smart-grid
Production
Biomass cogeneration
Consumption
Solare PV (ESRF, parkings)
Hydraulic
Total
New buildings all usage
Low-temp loop pumps & heat pumps
Public lighting
Available for electro-mobility
25 GWh/y
2,4 GWh/y
7 GWh/y
34,4 GWh/y
24 GWh/y
1,4 GWh/an
0,6 GWh/an
8,4 GWh/an
Heating and cooling using renewable and recovery energy
Reversible low-temp loop : 100% of the heating / cooling needs of 150,000 sqm new buildings
Biomass cogeneration plant : 135 GWh/y high temperature available for the city heat
network, 4 times the consumption of the district

15. Smart grid
GreenLys: a full-scale demonstrator
Two technological platforms (Grenoble and
Lyon ) for 1,000 residential customers and
40 commercial and industrial sites
Integration of renewable energy sources
Smart metering
Searching for new business models