Stakeholders

Name : Ville de BOURGOIN JALLIEU

Contact : Mme Valérie Libon - vlibon@bourgoinjallieu.fr

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Name : TEKHNE ARCHITECTES

Contact : M.Christian Charignon - tekhne@tekhne-architectes.com

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Name : ASTRIUS

Contact : David Personne - astrius@astrius.fr

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Name : TRIBU

Contact : Karine Lapray - lyon@tribu-concevoirdurable.fr

Action : Environment Research Bureau

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Name : DPI

Contact : Didier Pierron - secretariat@dpistructure.com

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Name : DENIZOU

Contact : Stéphane Nardy - cbt.denizou@denizou.fr

Action : Design office economy

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Name : PEUTZ

Contact : Sylvain Guitton- s.guitton@peutz.fr

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Name : ACI

Contact : Alain Clément - aci.clement@wanadoo.fr

Action : Kitchen design office

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Name : EODD

Contact : Cecillia Ellul - c.ellul@eodd.fr

Action : Soil remediation design office

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Name : CEREMA

Contact : Nathalie Moral - Nathalie.Moral@cerema.fr

Action : Auditor RT2012

Owner approach of sustainability

Construction of a low consumption school complex
High demands in integration to the site
High demands in thermal comfort, daylight, visual and acoustic comforts
High demands in air quality
High demands in maintenance perenity
High demands in waste management

Architectural description

Located along the street structuring the reconversion of the Diederichs industrial site, along the urban park of the Lilattes on Grand Tissage Avenue, the school group benefits from a location that lets it stand out as an institutional building.

The project set up the program in two two-storeys buildings on the northern limits (kindergarten) and South (primary school) of the plot. The two buildings are connected by a building functioning as a "bridge" along the street, anchored to the ground by an organic volume hosting the common spaces. This distribution preserves the opening of the playground to the park while forming the covered yards. The access to elementary and kindergarten are distinct.

The northern and southern facades are coated with a masonned coating, interrupted by the joinery of the bays their fixed sunscreens. The western facade is composed with wooden planks and cladding that creates a relationship with the nearby park. The courtyards are separated by a shrubby limit, which could disappear, depending on how teaching practices. Medium trees are planted to shade acesses and the western side of the "bridge" building.

Building users opinion

Ongoing survey

Energy consumption

• Primary energy need : 15 kWhep/m².an
• Primary energy need for standard building : 83 kWhep/m².an
• Final Energy : 51 kWhef/m².an
Breakdown for energy consumption :

Consumptions are expressed as primary energy
- Heating 34.00 kWhep/m².year
- Cooling 0.00 KWhep/m².year
- Hot Water 2,00 kWhep/m²
- Lighting 7,90 kWhep/m²
- Auxiliaries 6,30 kWhep/m²

More information :

Underway, stock expected in October 2015

Envelope performance

More information :

Bbio = 41.9; Bbio Bbiomax = - 49.21%

Building "clasps"
Timber-concrete structure: heavy inertia (restricted access to inertia through suspended ceiling in the rooms)
Wall: rockwool external thermal insulation 20cm
Roof: vegetated roof 24 cm PUR
Paving: 8cm PUR

Building "bridge"
Timber-Steel structure: light inertia
Wall: 24cm rockwool
Roof: Membrane 20cm heavy wooden wool + 8 cm rockwool to strengthen inertia
Floor: projection mineral wool 300mm + 75mm wood fiber panel

Everywhere:
Double glazed wood joinery low-emissive argon, solar control adapted to orientations
Avoided thermal bridges: psi Ratio: 0.05 W / (m².K)

• Air Tightness Value : 1
• Users' control system opinion : Ongoing survey

Systems

Heating system :
• Condensing gas boiler
• Water radiator
• Low temperature floor heating
Hot water system :
• Condensing gas boiler
• Individual electric boiler
Cooling system :
• No cooling system
Ventilation system :
• Natural ventilation
• Free-cooling
• humidity sensitive Air Handling Unit (hygro A
• Double flow heat exchanger
Renewable systems :
• No renewable energy systems

Assisted natural ventilation through turrets in classes and common spaces.
Assisted natural ventilation through openings are piloted in circulation spaces.

Smart Building

BMS :

Management: boiler, heating circuit, BMS in the school restaurant, blinds and sun breakers, openings for ventilation, general extinction of lighting. Monitoring: counteing of energies (gas, water, electricity) by, Supervisor TREND 963 - 6 Auto

Smartgrid :

Remote access to BMS information from a remote computer station.

• Users’ opinion on the Smart Building functions : First steps and adjustments in progress (first year) Favourable Opinion

GHG emissions

• GHG in use : 9 KgCO₂/m²/an

Methodology used : RT2012

Life Cycle Analysis

• Eco-design material : Local wood for framing, siding, insulation and joinery
  Linoleum flooring
  Paints with European ecolabel

Water management

• Consumption from water network : 1 500 m³

Water Consumption/m2 : 0.61

Water Consumption/Pupil : 4.29

Rainwater is timed on the roof before being discharged into the network according the prescribed leakage rate.
Water collected in the yard infiltrates into the vegetated ditch separating the two courtyards.

Indoor Air quality

• Indoor Air quality : Measured VOCs concentrations in the various rooms are well below the indoor air guide values ​​(see ratio measurements). Air renewal rate: 25m3/h.person, higher than the norm. Anticipation of the recommendations to come on air quality in childcare institutions

Health & Comfort

• Health & comfort : Direct access to classrooms for kindergarten classes and ground level school restaurants.
  Natural lighting of all spaces, second day by skylights in the kindergarten classes, second day by window bays in circulations in elementary classes.
  Brightness control by adjustable external sun breakers in classrooms, by interior blinds in the dorms and the audiovisual room.
  Natural ventilation assisted with turrets, modulated class by class and by indoor and external temperature sensors plus a VOC sensor.
  Autonomous night overventilation
  
  Special attention on the materials used: selection of healthy and low-emission VOC materials, European ecolabel

Measured indoor CO2 concentration : mesures en cours

• Acoustic comfort : Sensitive premises (dormitories) have been distanced from potential noise sources (roads and courtyards)
  Implementation of a screed against impact noise (motricity room upstairs)
  Implementation of absorbing wood panels perforated to strengthening the absorption (school restaurant and motricity room)
  Implementation of privacy protections in bullet pierced wooden panels to partition refectories and avoid vocal escalation voice (calling out from one end of the room to the other)
  
  Inside acoustic tests
  Emission - Outside on Grand Tissage Avenue; Reception - Resting Room 4: Windcatcher open = 39dB, Windcatcher closed = 38dB; Isolation required DNTA, tr = 35 dB; C compliant
  
  Emission - Outdoor (North Park); Reception - Resting room 1: Windcatcher open = 40dB, Windcatcher closed = 40dB; Isolation required DNTA, tr = 35 dB; C compliant
  
  Emission - Courtyard ; Reception - Preschool Room 4: Windcatcher open = 39dB, Windcatcher closed = 38dB; Isolation required DNTA, tr = 35 dB; C compliant

Product

Name : Windcatcher X air



Producer : Monodraught

Contact : nick.hopper@monodraught.com

• Product category : HVAC, électricité / ventilation, cooling
Description :

Assisted natural ventilation turret

Comments :

Good Appreciation
Favorable acceptance of taking manual control (forced closing/opening) for a given time
Comment on rattling noise when fonctionning in a very quiet environment.

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Name : Strong PAVATHERM



Producer : Pavatex

Contact : jeremie.Boucher@pavatex.fr

• Product category : Finishing work / Partitions, insulation
Description :

High phase insulation

Comments :

Hidden insulation, not perceived but highly limiting the impact of the weak structural inertia of this part of the school group on overheating in summer.

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Name : Wood-aluminum curtain wall



Producer : Raico

Contact : info@raico.fr

• Product category : Finishing work / Exterior joinery - Doors and Windows
Description :

Curtain wall with thermal bridges breaks on wooden support

Comments :

Favorable appreciation
Warm material

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Name : A color filter incorporated in the glazing



Producer : Vanceva

Contact : patricia.bezie@saint-gobain.com

• Product category : Finishing work / Exterior joinery - Doors and Windows
Description :

Film incorporated in the glazing to create colorful sun breakers

Comments :

Favorable appreciation
Playful material

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Name : skylights



Producer : solarspot

Contact : http://www.solarspot-lfr.com/contact.php

• Product category : Structural work / Passive system
Description :

Natural light intake by duct from the roof;

Comments :

Very well received generous contribution of light on the second row in classes

Construction and exploitation costs

• Cost of studies : 585 840 €
• Total cost of the building : 4 541 268 €

Urban environment

Prow implementation of a conversion site near a large treed park, along a treed road to the city center.

Land plot area

2 595 m²

Built-up area

61 %

Green space

1 300

Parking spaces

Installation of a bike shelter in the courtyards and in front of the school to encourage using gentle transportation modes.
2 places to drop off reduced mobility people and a large public car park in the immediate vicinity

Building Environmental Quality

• indoor air quality and health
• biodiversity
• works (including waste management)
• acoustics
• comfort (visual, olfactive, thermal)
• waste management (related to activity)
• water management
• energy efficiency
• maintenance
• mobility
• products and materials