National Park Headquarter in la Reunion
Last modified by the author on 11/05/2020 - 12:28
- Building Type : Other building
- Construction Year : 2014
- Delivery year : 2014
- Address 1 - street : Rue de La République 97431 LA PLAINE DES PALMISTES , France
- Climate zone : [Af] Tropical Wet. No dry season.
- Net Floor Area : 1 744 m2
- Construction/refurbishment cost : 4 250 000 €
- Number of none : 50 none
- Cost/m2 : 2436.93 €/m2
Primary energy need
(Calculation method : Built before those regulations )
Construction of the Reunion National Park headquarters (offices and meeting room) and a permanent exhibition room open to the public. SHON 1744sqm.
Specificity of the project : situation in altitude humid tropical zone (1000m), a wet and cold season and a hot and humid season.
Economy systems :
VMC double flow. Wheat panels for cafeteria and changing rooms LED office lighting with presence detectionWood stove for cafeteria
Double climate strategy :
Climatic zoning of premises according to uses
Summer comfort :
Dry structure with low inertia limiting the accumulation of heat and the radiation of the walls, efficient insulation of the envelope (roof and insulated walls), natural ventilation through individually adjustable openings to the right of each workstation, fine constructive frame optimizing the potential of natural ventilation, thermal buffer of the northern corridor shaded by the overhang of roof, vegetation of the surroundings favoring the bubble of freshness.
Winter comfort :
Dry structure limiting the effect of cold walls, insulation of walls and joinery (double glazing), passive green space in the North, fast-moving
water column wall in the afternoon (generally sunny in the morning and cloudy in the afternoon) noon) between greenhouse and offices, VMC double flow with dehydration and preheating of fresh air.
Natural lighting : Optimization of the natural lighting of all the offices thanks to the narrow constructive grid, transparent floor of the corridors optimizing the natural lighting of the ground floor.
Biobased materials : Bonded laminated wood structure, KLH floors, pine façade frames, Red Cedar shingles (all woods are PEFC or FSC certified).
Healthy materials : VOC-free materials, mineral lime paints, PVC floors with VOC (volatile organic component) encapsulation.
Local materials : Lava stone doubling walls, volcanic slag for parking floors.
Rainwater management : Dissemination without concentration of rainwater in time delay systems, infiltration landscaped (removal of pipes), construction on stilts preserving the hydraulic transparency.
Water- saving systems : Floating water 3/6 l, tap delay
Ecological restoration of the site :
ecological restoration of the forest ecosystems of the upper part of the island (pandanées forest), first Réunion. completion 2015.
Low carbon construction : Use of wood in frame, structure, floors and cladding.
Energy management : Projected consumption 24KWh / m² / year floor area Total capacity : 62 kW
Sustainable development approach of the project owner
Excerpt from the contest program:
Offer of the high level of comfort conditions
( ch. HQE)
The designer must propose a project that respects all the constraints and requirements relating to the comfort of the staff during work and relaxation, as well as for all visitors
The architecture should provide solutions for a high level of comfort and therefore the satisfaction of users in terms of acoustics, lighting, taking into account climate data and space functionality.
The qualities of space, clarity, fluidity and acoustics should apply to all workplaces but also to the relaxation areas of staff and public reception.
By its choice of location and design, the designer will have to provide satisfactory solutions, particularly in the following areas:
- promote the acoustic protection of all premises,
- to favor the natural light of all the premises despite the constraints related to the low sunshine of the Plaine des Palmistes,
- to favor the natural ventilation of all the premises while guaranteeing quality conditions of
the air in order to avoid the inconvenience associated with the high humidity of the climate of the Plaine des Palmistes.
- to allow the management of the temperature of the offices summer as hive r,
Extract of the notice of the contest:
The duparc house must be an illustration of the park's missions , a tool As said the program, which can express the originality of these missions ... the house of the park can not be conceived as a confinement , a new theater of administrative power, a "reiteration" to use the language of the ecologists of a formeassise and historical like that which is the house of the turrets.
In a high village, marked by the modesty of its inheritance built in a vegetal matrix, certainly todayadded and subject to the insatiable appetite of invasive species (to which species we could easily add concrete, asphalt and fences .... ), the house of the park interferes in a free movement allowing to pass, to live and to develop the original reconstituted vegetal matrix ....
Here, sacred soil , magical epidermis and essential to the original biodiversity, manager of the hydrological impacts, already wounded by the human artifice, it is then the most preserved possible, in order to satisfy its essential missions: its global role of terrestrial epidermis, interface interlithosphere and atmosphere. This posed, the site is then constructible.
Pointing its orientation towards the climatic clock of the rains indicated by the waterfall Biberon , the House of the Park seconcentre in its site, the one that the ecologists attribute to him , and unfolds itself in arms or troncspaysagers, by opening the panorama towards the ramparts, and privileging the moreproche to exalt the force.
Along this line of sight towards the waterfall column of Cascade Biberon is a simple dividing line with eastward the spaces of the personnel and towards the West the open and panoramic space of the reception . This one, touching the vegetal ridge reinforced and revitalized by the project, unfolds towards the big landscape while protecting itself from the views of the "street". Lamise in theatrical scene of the valued landscape is thus magnified.
The workplaces of the teams stretch out in three branches, seeking each saposition to the light, in the manner of sciaphile species orienting their leaves to seize the thin luminosities offered by the environment. These workplaces, decreation, sharing and consultation, enjoy a large centralrécréatif quiet space, open to the landscape of the eastern wall of the Plain. On the national side, their gears emerge as enigmatic signals drowned in the reconstituted vegetable sands.
Between these two opening movements, there is a ramp leading to the observatory of landscapes suspended above the territory. The dynamics of the composition is an invitation to travel ...
In this immersion in the environment, the environmental value of the project is played out.
If, punctually, the natural stone comes to clad outdoors to be inhabited by primitive lichens and mosses or other ferns, wood and dry structures is the guest of the environmental project, the concrete being restricted to the strict minimum of the foundations reduced to the finest . Salty and traumatic dechantier point for the site, since the VRD (Roads and various networks) becomes landscape and the building mechanized game dry storing C02 ... .The materials of the architectural project are melted in nature: raw wood of shingles of tamarind, basalt with lichen, zinc of variable shade , transparent glass ... leaving the interior colors of the workspace to resonate freely.
The bioclimatic project , in addition to a strictly limited system and a climatic buffer in the North, proposes an active system only for recreational winter stoves for reception areas and staff; the artefacts are generated by the built envelope which constitutes itself the "climate machine with comfort". But, beyond the "physical" comfort, the park house is conceived as an inviting support for creative and involved work; to be well, to co-exist with its environment, its anthropic part, it is the starting point so that the park can exalterses missions and to invite each one with the respect of the biodiversity of Reunion.
If you had to do it again?
This project and one of the emblematic achievements of our agency. Some improvements could have been made: Use of tamarind shingles (local wood) instead of red cedar (cost problem). Reuse of rainwater for toilet water (initially planned but abandoned by the building owner). Increase of the glass area of some offices on the ground floor to improve the autonomy in natural lighting. Use of sourced organic insulation instead of polystyrene graphite (no technical advice available for ERP at the time) In order to optimize the comfort of offices in winter, the VMC could be improved by reversing the circuit: extracting warmer air on the floor and blowing on the ground floor.
See more details about this projecthttps://www.construction21.org/france/data/sources/users/7721/c-21.doc
Other consultancy agency
bet QEB, Thermo and landscape
Bois de bout
wood structure study
Other consultancy agency
Other consultancy agency
Type of market
Global performance contracthttps://www.construction21.org/france/data/sources/users/7721/cr64-mdp.doc
- 154,00 kWhep/m2.an
- 390,00 kWhep/m2.an
Real final energy consumption
PREVISIONAL ENERGY JUSTIFICATIONS HYPOTHESES Opening of the establishment From 8 am to 6 pm for 253 days / year Lighting: installed power8276 W Lighting: installed power5 W / m²SDO Lighting: abundance of installed power0.60 Operating autonomy in natural lighting75% Lighting: annual lighting time632 h / year Office ventilation: fans power 0.5 kW nominal, 1 kW max (for heating) Office ventilation: VMC11 hours / day operation for 130 days / year (winter) + 50 hours / year (very heavy summer rainfall) = 1480 hours / year Office ventilation: CTA power (max.) 8.6 kW Office ventilation: CTA power (nominal) 6.6 kW Office ventilation: operation dehumidification9 hours / day, 130 days / year (winter) + 5 days / year (very heavy rain) = 1220 hours / year Office ventilation: heating operation2 hours / day (early morning) for 130 days / year = 260 h Office ventilation: CTA power for heating8.6 kW ElevatorCumulative operation: 1 hour / year Office automationAverage power density: 8 W / m² Auxiliary (EP recovery, devices taken, ...) Average power density: 2 w / m²
- Wood boiler
- Solar Thermal
- No cooling system
- Natural ventilation
- Double flow heat exchanger
- Solar Thermal
- Wood boiler
- 4 921,00 m2
- 23,00 %
- 3 447,00
Structural work / Carpentry, cover, titghtness
Wood polystyrene wood sandwich
This product serves as a support for zinc roofing and finishing for floor ceilings
Finishing work / Partitions, insulation
Particleboard of wood and cement
Has advantageously replaced the traditional plasterboard partitions that could not be used in view of the humidity and rainfall conditions of the building site
Structural work / Structure - Masonry - Facade
Structural panel consisting of spruce boards glued in crossed layers
Replaces concrete floors and optimizes the CO2 balance of the project
Construction and exploitation costs
- 2 400,00 €
- 357 000 €
- 4 250 000 €
- 18 000,00 €
Indoor Air quality
Life Cycle Analysis
Reasons for participating in the competition(s)
Réduction de consommation énergétique par stockage inertiel dans les tubes d'eau.
Zonage thermique par fonction, utilisation de matériel à faible consommation (optimisation éclairage, eau, restauration écologique du site, utilisation de solaire passif).
Confort thermique assuré par construction bois à faible rayonnement, solaire passif + VMC double flux + stockage inertiel.
Bâtiment 100% ossature bois.?