Nianing's church, Senegal
New Construction
- Building Type : Other building
- Construction Year : 2016
- Delivery year : 2019
- Address 1 - street : Nianing, Sénégal Sénégal NIANING, Autres pays
- Climate zone : [As] Tropical dry
- Net Floor Area : 457 m2
- Construction/refurbishment cost : 1 059 799 €
- Number of none : 3 none
- Cost/m2 : 2319.04 €/m2
-
Primary energy need
3 kWhep/m2.an
(Calculation method : )
Located on the shells' coast, south of Dakar, the project is imbued with this regional particularity taking as a starting point the spiral shape of a cymbium.
Oriented towards the east and sloping towards the sky, the building closes to the north and the south to protect itself from the sun and the harmattan.
The building opens to the west to capture the freshness of the trade winds by a set of volumes broken down into seven vaults with a bell tower that rises to 45 meters and plays the role of both signal and ventilation chimney.
In order to put in place a natural passive ventilation, the project is inspired by the functioning of the African termite mound which is an extremely efficient model of thermal regulation. It is also inspired by the operation of wind towers in East Africa, which have also been known for centuries for their effectiveness.
Sustainable development approach of the project owner
Promote the hiring of a local workforce for the construction of the building.
The Eiffage company honored this request and hired more than 50% of the construction team in the Mbour region
Architectural description
The woods all come from Cameroon forest labeled "respect for the environment and sustainable development". All non-reusable formwork timber for other sites was recovered to build the church choir chairs.
Building users opinion
Without knowing the work on the passive natural ventilation, the abbot told us when the final reception of the works in April 2019: What a freshness in this church!
Photo credit
King L'enemy
Contractor
Construction Manager
Stakeholders
Construction company
Eiffage Sénégal
Dominique Job / Sandra Villepontoux / Gérard Sénac
http://senegal.eiffage.sn/General Enterprise
Structures calculist
ETECS
Lucien Santolini
https://www.etecsafrique.com/Office of study structure
Construction Manager
GA2D
Eric Mulot
executing project management relays
Energy consumption
- 3,00 kWhep/m2.an
Real final energy consumption
1,00 kWhef/m2.an
1,20 kWhef/m2.an
2 019
More information
LED bulb (total consumption: 496 kWh / year)
Systems
- No heating system
- No domestic hot water system
- No cooling system
- Natural ventilation
- No renewable energy systems
Urban environment
- 5 691,00 m2
- 725,00 %
- 4 311,00
Product
Concrete
cimenterie locale (à Kirene, environ 50km)
Cimenterie du Sahel
Gros œuvre / Structure, maçonnerie, façade
Reinforced concrete vault, optimization of the material (15cm thick)
The product was enthusiastically accepted by all stakeholders.
steel canopy
Second œuvre / Menuiseries extérieures
The product was enthusiastically accepted by all stakeholders.
Coated coating
Second œuvre / Revêtements de sol
Local shell used as aggregates
The product was enthusiastically accepted by all stakeholders.
Large cunettes and retention basins
Aménagement extérieurs / Gestion des eaux pluviales
At the foot of the vaults were drawn large cunettes that are gravitarily connected to landscaped retention basins located below the site. The retention ponds compensate for the waterproofing created by the building and allow the infiltration of progressive water into the soil during the rainy season.
The product was enthusiastically accepted by all stakeholders.
more than 50% of the workforce was hired in the region
Management / Implication des parties prenantes
The product was enthusiastically accepted by all stakeholders.
Cooling by thermal print of the bell tower
Génie climatique, électricité / Ventilation, rafraîchissement
The verticality of the building has been exploited to the maximum to create natural ventilation day by "chimney effect" and at night the system turns by natural convection.
The product was enthusiastically accepted by all stakeholders.
Construction and exploitation costs
- 1 059 800,00 €
- 1 059 800,00 €
- 113 032 €
- 1 059 799 €
Energy bill
- 99,00 €
Comfort
GHG emissions
- 0,30 KgCO2/m2/an
- 167,00 année(s)
Reasons for participating in the competition(s)
Creation of passive natural ventilation by the bell tower to ensure the freshness of the building and avoid the use of electric fans and air conditioners.
Building candidate in the category
Energie & Climats Chauds
Prix du public
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