Racine Secondary School - Saint-Brieuc
Last modified by the author on 25/03/2021 - 10:36
New Construction
- Building Type : School, college, university
- Construction Year : 2018
- Delivery year : 2021
- Address 1 - street : 1 rue Racine 22000 SAINT-BRIEUC, France
- Climate zone : [Cwb] Mild, dry winter, cool and wet summer.
- Net Floor Area : 7 154 m2
- Construction/refurbishment cost : 9 800 000 €
- Number of Pupil : 600 Pupil
- Cost/m2 : 1369.86 €/m2
Proposed by :
Certifications :
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Primary energy need
19.5 kWhep/m2.an
(Calculation method : RT 2012 )
The Departmental Assembly of Côtes d'Armor decided to rebuild the RACINE college on its original site.
The program of the new college includes teaching facilities for 600 students, supplemented by a catering center and a kitchen, as well as an existing gymnasium center, which has been renovated.
Built in the early 1960s, the college buildings were a source of discomfort, were no longer functional or adapted to current pedagogies and no longer responded to current environmental challenges (presence of asbestos, very poor insulation, very energy intensive). The decision to rebuild the teaching building, the school canteen and to renovate the sports center is part of a high environmental quality approach in order to greatly limit the impact of the reconstruction.
Sustainable development approach of the project owner
Climate change is a reality that no one can ignore anymore. At the Côtes d'Armor Department, we have been working for several years, but have decided to go further. To a punitive vision, we prefer an incentive and unifying vision, because this fight can only be won collectively.
The result of the work of the “Environmental Responsibility” working group, the Departmental Council has drawn up a document that reveals the Department's ambition for the next 5 years in the field of energy transition. 5 axes have been chosen to be as transversal as possible, so that as many departmental policies as possible integrate our ambition for the climate:
- Strategic axis 1 - promote information
- Strategic axis 2 - work on uses
- Strategic axis 3 - accentuate the energy renovation of departmental buildings
- Strategic axis 4 - deploy renewable energies
- Strategic axis 5 - act on mobility
Architectural description
The new design is based on the compactness of the frame which makes it possible to bring together all the college students and
teachers around an interior street lit and shaded by a photovoltaic canopy. During the time of at noon, users cross the courtyard to reach the restaurant.
In general, the architectural bias asserts itself in a search for sobriety, see stripped down which carries a message of simplicity, solidity, rigor, durability away from fashions. It is a solid image, without fantasy that characterizes the establishment from the public domain, while on the courtyard side, the atmosphere is open, brighter in a green, even rural context.
Between April 2018 and July 2020, the new college was built in the heart of the site which was maintained in service. After a reorganization and a regrouping of the pupils in the north and west wings, the space available for the construction of the new premises was cleared. Finally, the courtyard was completed after moving to the new buildings, and delivered for the 1st quarter of 2021.
Photo credit
Pierre Béout / Stepcam
Contractor
Construction Manager
Stakeholders
Thermal consultancy agency
Ingérop Conseil & Ingénierie
Marie Le Potier, Ingénieur HQE, marie.lepotier[a]ingerop.com
www.ingerop.comFluid design, thermal studies, environmental studies (LCA)
Structures calculist
BSO
Patrick Leroux
https://bso22.fr/BET Structure Reinforced concrete
Structures calculist
Arborescence
Pierre Bregeon
https://arborescence-concept.com/BET Structure Wood
Other consultancy agency
Acoustibel
http://www.acoustibel.fr/BET Acoustics
Other consultancy agency
Kegin Ingénierie
https://kegin-ingenierie.com/BET Kitchen
Type of market
Global performance contract
Energy consumption
- 19,50 kWhep/m2.an
- 55,00 kWhep/m2.an
Envelope performance
- 0,22
- 0,34
Systems
- Heat pump
- Individual electric boiler
- No cooling system
- Double flow heat exchanger
- Solar photovoltaic
- 28,60 %
Urban environment
Construction and exploitation costs
- 9 800 000 €
GHG emissions
- 50,00 année(s)
- 1 091,08 KgCO2 /m2
Life Cycle Analysis
Reasons for participating in the competition(s)
As part of the experiment "Positive energy buildings and carbon reduction: E + C-" piloted by ADEME, the project has contributed to initiating the future 2020 environmental regulations which aim for the positive energy level and a commitment to high environmental quality. The orientation of the facades, the efficient insulation and airtightness, the choices of ventilation, geothermal heating, photovoltaic production, the rainwater circuit and recovery, soil permeability and use massive amounts of bio-sourced materials are all subjects to achieve this objective.
The choice of location for buildings is the result of a strong desire to strive for very high energy performance. The environmental objectives were to reach level E3C2 for the teaching building, E2C1 for restoration (levels E3C1 and E0C1 respectively reached at the end of the project). The project was monitored throughout (design and implementation) as part of ADEME's OBEC program and we are continuing to monitor energy consumption during the operation phase.
The teaching volume is characterized by optimal compactness, offering North or South façade orientations, the best solution to guarantee protection to external inputs without restricting mobile and mechanical devices, to guarantee minimum heating consumption, but also to find the "summer" comfort at any time of the year.
In the North, the classes benefit from a generous and constant light supply, without constraints of glare or thermal overheating. To the south, a mesh of inclined aluminum slats with variable pitch protects the rooms from overheating at any time of the year, by controlling the views and the light.
The project gives pride of place to biobased materials: mixed wood-concrete structure, wood-frame walls, roof in wooden boxes, cellulose wadding insulation, wood joinery, ... The in-depth work of itirative life cycle analyzes and of variant studies enabled the architect and the BET to optimize the choice of materials to tend towards the lowest possible carbon footprint.
In terms of energy, an educational building powered by gas absorption heat pump, a photovoltaic canopy and high efficiency photovoltaic panels. In addition, very high attention in the works phase on the airtightness of the aeraulic networks and the envelope, ultimately for a project with very high energy and environmental performance.
Building candidate in the category
Bas Carbone
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