Kindergarten and primary school group Simone Veil

by Tekhne Architectes
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2015-06-12 10:59:54
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Francia
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22597 / FR

New Construction

Building Type : School, college, university
Construction Year : 2014
Delivery year : 2014
Address 1 - street : 1, Promenade des Rêveries 38300 BOURGOIN JAILLEU, France
Climate zone : [Csb] Coastal Mediterranean - Mild with cool, dry summer.

Net Floor Area : 2 455 m²
Construction/refurbishment cost : 4 541 268 €
Cost/m2 : 1849.8 €/m²

Primary energy need :
15.3 kWhep/m².an
(Calculation method : RT 2012 )

Energy consumption

Economical buildingBuilding

< 50A

51 à 90B

91 à 150C

151 à 230D

231 à 330E

331 à 450F

> 450G

Energy-intensive 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.

Sustainable development approach of the project owner

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

See more details about this project

http://www.tekhne-architectes.com/projet_archi/groupe-scolaire-maternelle-et-primaire/?cat=Enseignement
http://www.construction21.org/france/articles/fr/laureat-sante--confort-2015-groupe-scolaire-simone-veil-france.html

Stakeholders

Function : Contractor

[email protected]

Function : Designer

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Function : Thermal consultancy agency

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Function : Other consultancy agency

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Function : Structures calculist

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Function : Other consultancy agency

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Function : Structures calculist

[email protected]

Function : Other consultancy agency

[email protected]

Function : Other consultancy agency

[email protected]

Function : Environmental consultancy

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Contracting method

Separate batches

Energy consumption

Primary energy need : 15,30 kWhep/m².an
Primary energy need for standard building : 82,50 kWhep/m².an

Calculation method : RT 2012

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

Real final energy consumption

Final Energy : 51,15 kWhef/m².an

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)

Indicator : I4

Air Tightness Value : 0,77

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 : 8,74 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 : 1 500,00 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

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

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Product category : HVAC / Ventilazione, Raffrescamento

Assisted natural ventilation turret

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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Product category : Opere di finitura / Partizioni, isolamento

High phase insulation

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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Product category : Opere di finitura / Elementi esterni - Porte e Finestre

Curtain wall with thermal bridges breaks on wooden support

Favorable appreciation
Warm material

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Product category : Opere di finitura / Elementi esterni - Porte e Finestre

Film incorporated in the glazing to create colorful sun breakers

Favorable appreciation
Playful material

Product category : Opere strutturali / Sistema passivo

Natural light intake by duct from the roof;

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

Land plot area : 2 595,00 m²

Built-up area

Built-up area : 61,00 %

Green space

Green space : 1 300,00

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

Reasons for participating in the competition(s)

While controlling the GHG emissions, the issue of the student's health and comfort was especially taken care of:

Beyond winter comfort, summer comfort already is and will be increasingly an essential concern in buildings. Designing a school capable of keeping a maximum temperature of 26°C without any active cooling system after 3 heatwave days adn with 30 students per class, was the challenge the team had to take on.
By cross-integrating environmental vectors: bioclimatic orientation, heavy inertia and over-insulation of the envelope, exhaustive solar protection, assisted natural over-ventilation, high albedo of the outside floors and preservation of enclaved green spaces, the school adapts to strong climatic variations, with nearly no use of energy.

Other factors strongly contribute to the comfort and health of the users :

Air quality helps calm and concentration of the students: in this school, set up on a former industrial site, there was a double challenge, on CO2 levels and on specific pollutants.
Here the adopted air renewal system anticipates on the regulations for schoold and other places of children care, with a rate of 25m3/h.person. Materials were carefully selected with labels certiying minimal VOC emissions. VOC measurements when delivering the building confirm the success of this approach.
In addition, the double flow assisted natural ventilation (by turrets) is innovative and requires almost no maintenance when it comes to mechanical systems.
Acoustic quality of the rooms, which is critical to the quality of attention of the students, has been validated by post-construction tests.
Positive influence of daylight is valued by the generous sizes of the bays, the mastered dosage through mobile solar protections and the secondary daylinght income.
Views and access to the outside, the priviledged relation of the courtyards to the public space encourages social bonding and participates to peace in the community.