Introduction

Greater Lyon has adopted a strategic action plan for the development of Renewable Energies.  RESTART has started the implementation of the action plan on the building sector, from social housing.  The project concerns 200 dwellings, which use innovative technologies to reduce the energy consumption by 20%.  It is expected that, each year, 20% of residential buildings in the Lyon area will be built according to these technologies.

Objectives and target audience

To use the large savings potential in the residential sector of Greater Lyon, owners are encouraged to implement sustainable building renovation strategies.

Financial Resources and Partners involved

Funds for this have been provided through the European Commission’s THERMIE programme set up to encourage renewable energy strategies in cities.  Financial support is provided in the form of grants for renovation.
The concept behind a reduced VAT rate to encourage investment in RES and EE measures is an excellent way to stimulate the local industry and wider implementation.
Renovation project:

• Energy investment (Euro) 1,001,662
• Extra cost (Euro/m2 dwellings) 6.54

Project Team:-

• Grand Lyon
• Région RhonesAlpes
• Rhônalpénergie environnement
• ADEME
• INSA
• Technical Project Assistance
• Local RESET Team
• AGORA’

Process

The project Cours Jean Damidot -Villeurbanne is situated in an urban area, near many facilities, primary schools, house of association, swimming pool and shops. The building is designed for the users particularly children, as they will have green spaces separate from streets and located on the south facade.

• Number of dwellings: 17
• Green houses: 15
• m2 solar collectors: 20
• Energy performance: 104 kWh/m²

Les Fossés de Trion – Lyon building is situated in a periphery urban area, well equipped: primary schools, colleges, high school, hospital, university, theatre, swimming pool and shops. However, the location is better adapted to car users than pedestrians. Buses are available but cycling is difficult because of the characteristics of the site.

• Number of dwellings: 49
• Green houses: 27
• m2 solar collectors: 60
• Energy performance: 132 kWh/m²

The building project Place Antoinette/Cours Vitton is situated in an urban area with an average rate of public equipment: primary schools, sport centre and shops. Green spaces are located on the north side due to urban continuity constrains.

• Number of dwellings: 25
• m2 solar collectors: 40
• Energy performance: 111 kWh/m²

The project Avenue Berthelot is situated in an urban area, near many facilities, primary schools, university, hospital and shops. The building is designed for the users, particularly children, as they will have green spaces separate from the street and located on the south facade.

• Number of dwellings: 40
• Green houses: 40
• m2 solar collectors: 75
• Energy performance: 111 kWh/m²

Rue Léon Blum Villeurbanne is situated in an urban area, near many facilities, primary schools, house of associations, swimming pool and shops.
The building is designed for the users particularly children, as they will have green spaces separate from streets and located on the south facade.

• Number of dwellings: 19
• Green houses: 15
• Energy performance: 136 kWh/m²

ZAC des Balmes is situated in an urban area with classical equipment: school, sport centre, shops. Every house has its own garden.

• Number of dwellings: 36
• Direct solar heating: 22
• Energy performance: 156 kWh/m²

The project in street Pierre Delore is situated in the Urban area with good south orientation. It has 5 levels.

• Number of dwellings: 27
• m2 solar collectors: 54
• Energy performance: 112 kWh/m²

In order to help the coordination of the project, a common guidebook for the design of efficient buildings has been developed and proposed to the public housing organisations partners of RESTART
The guidebook is based on the following elements:
A global approach on architecture, energy, water, environment applied to the design of social housing.
A targeted decrease of the total cost of energy and water for the occupants, the total energy plus water charges should not exceed 12,20 € /m²/year with a better comfort with specifications for the design of the buildings:-

• 20 compulsory measures: for example on architecture, acoustic, thermal comfort, reduction of air pollution, water savings, lighting, wastes, maintenance;
• 6 options (1-direct solar water heating system, 2-solar hot water, 3-green houses, 4-DSM, 5-water recovery from rain,6-improvement of insulation).  The designers have to choose at least one option among the firsts 3 options, and one among the last 3 )
• the possibility to develop photovoltaic applications if possible.

It was expected that the combination of these measures will reduce the energy consumption by 30 to 40%, while the total cost for energy and water is reduced by 40 to 50%.
To develop the guidebook, different meetings with persons in charge of social housing organisations have been organised.  Some modifications of the guidebook have been integrated to take into account specific problems.  During the design phase of the project, the guidebook was the basis for the specifications of the buildings.
RESTART guide book is now the reference for the building sector in Great Lyon, this is a very important success for the RESTART project.

The energy features:-
Energy Supply:-

• Energy efficient collective heating systems
• Condensing gas boilers
• ctive solar water heating

Architectural – Building technologies:

• Solar veranda (pre-heat ventilation air)
• Passive solar design considered in orientation
• Low E double glazing
• Insulation standards over and above building regulations

Environmental Services HVAC: -

• Humidity controlled ventilation
• Low NOx emission boilers
• Direct solar underfloor heating

Lighting and Controls:

• Compact Fluorescent lighting installed

Results

The project Cours Jean Damidot -

• Savings vs. standards: 45%
• Share of renewables: 19%

Les Fossés de Trion – Lyon building

• Savings vs. standards: 31%
• Share of renewables: 12%

The building project Place Antoinette/Cours Vitton

• Savings vs. standards: 42%
• Share of renewables: 16%

The project Avenue Berthelot

• Savings vs. standards: 42%
• Share of renewables: 9%

Rue Léon Blum Villeurbanne

• Savings vs. standards: 29%
• Share of renewables: 13%

ZAC des Balmes

• Savings vs. standards: 18%
• Share of renewables: 23%

The project in street Pierre Delore

• Savings vs. standards: 40%
• Share of renewables: 19%

Saving 910.000 Euro/y

Critical Success Factors / Challenges

When developing an action plan for a city or town it is essential to involve the local community in both the decision-making and implementation process.  This is particularly important for reinforcing the commitment and active participation in reducing energy consumption.  As such, awareness workshops and campaigns are very useful for stimulating the local interest in similar conditions.