Contractor

Name : Groupe Énergies Renouvelables, Environnement et Solidarité (GERES)

Contact : Gilles Michel / [email protected] / Bamako, Mali

 https://www.geres.eu/fr/

Construction Manager

Name : Groupe Énergies Renouvelables, Environnement et Solidarité (GERES)

Contact : Gilles Michel / [email protected] / Bamako, Mali

 https://www.geres.eu/fr/

Stakeholders

Function : Developer

Association la Voûte Nubienne (AVN)

Thomas Granier / [email protected]

 https://www.lavoutenubienne.org/


Partenanaire technique / expertise technique et formation VN

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Function : Others

Al-Mizan - Architecture, development, Ecology in Sahel

Mathieu Hardy / [email protected]

Architectural design + project management assistance

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Function : Others

Association Malienne d’Éveil au Développement Durable (AMEDD)

Execution partner

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Function : Construction company

Entreprise Karim Dembélé + artisans et apprentis VN

Execution company

Contracting method

General Contractor

Type of market

Table 'c21_maroc.rex_market_type' doesn't exist

If you had to do it again?

The power generation system has been overdimensioned.

Building users opinion

See GERES video

Energy consumption

• Primary energy need : 1,00 kWhpe/m².year
• Primary energy need for standard building : 1,00 kWhpe/m².year

Calculation method : Other

Envelope performance

More information :

The envelope consists of a massive adobe masonry (molded mud bricks and dried in the sun) + earth mortar, including the vaulted roof made without formwork, then loaded to form a roof terrace. The gabled walls (non-load bearing) are 40 cm thick, the load-bearing walls are 60 cm thick, and the roofs at their thinnest part are about 30 cm thick. The casing thus has a good thermal inertia, guaranteeing a better comfort of use compared to other current local constructive solutions (cement + sheet / cement + slab).

More information

The EAZ is entirely autonomous in terms of energy. An electric production center equipped with a field of 53 solar panels with a power of 12.5 KW / C provides the basic needs and can be relayed by a 20 KVA auxiliary generator powered by the Jatropha pure vegetable oil, agrofuel farmer produced locally since 2008. The supply of energy 100% renewable is provided 24/7 to companies of the EAZ.

Systems

Heating system :
• No heating system
Hot water system :
• No domestic hot water system
Cooling system :
• No cooling system
Ventilation system :
• Natural ventilation
Renewable systems :
• Solar photovoltaic
• Other, specify
• Renewable energy production : 100,00 %

The photovoltaic installation ensures the production of electricity of the zone of activities. A generator running on the pure vegetable oil of jatropha produced on the zone from seeds cultivated locally ensures the needs of peak, the "backup" in the event of breakdown on the installation, of insufficient sunshine or of non-electrical consumptions. planned. An electrical energy storage device is put in place to ensure continuity of services.

Urban environment

The ZAE Konséguéla is located in a rural area, at the entrance to the commune of Konséguéla. It is served by the main track that connects the town to the town of Koutiala (+/- 50 km).

• Land plot area : 4 400,00 m²
• Built-up area : 935,00 %
• Green space : 3 400,00

Product

Adobe



Local bricklighters / artisanal production mostly informal

Product category : Gros œuvre / Structure, maçonnerie, façade

The adobe is a mud brick molded and dried in the sun. The basic material is the building earth, whose main characteristics are: non-organic earth; fairly high clay content (25/30%) and good cohesion; worked in the plastic state (water content +/- 30%).

The Nubian Vault Technical Concept uses two models of adobe:
1 / A brick size 38 x 17 x 15 cm, used for walls, foothills and some arcades
2 / A smaller brick size 25 x 15 x 5 cm, used for vaults and common arches

Brick mortar is made with an earth mortar, generally of the same nature as that used for the production of adobes.

The product has been very well accepted by all parties involved in the project. The project owner chose the VN Technical Concept based on this material; the execution company complied with the specifications and integrated VN masons and craftsmen into its teams; the users appreciated the architectural qualities of the buildings (aesthetics, comfort, functionality).

Construction and exploitation costs

• Renewable energy systems cost : 70 000,00 €
• Cost of studies : 5 280 €
• Total cost of the building : 60 000 €

Life Cycle Analysis

Not available

Eco-design material :

It can be estimated that more or less 85% of "Nubian vault" buildings are produced from sustainable materials (there are no eco-labels in Sahelian Africa): raw earth and stone.



Over 30 years, it is estimated that the ZAE avoids > 960 tonnes CO2eq> 200 m3 of diesel

Water management

The EAZ is equipped with a borehole which feeds a water tower.

Indoor Air quality

The buildings are made entirely of raw earth, material considered particularly eco friendly.



Ventilation is exclusively natural.

Comfort

Health & comfort : The strategy developed to optimize the comfort and health of users is the use of a suitable constructive solution called the Nubian Vault Technical Concept: sustainable and eco materials; massive carrying envelope; good inertia; natural ventilation.

Calculated indoor CO2 concentration :

Not available

Measured indoor CO2 concentration :

Not available

Calculated thermal comfort : Not available

Measured thermal comfort : Not available

Acoustic comfort : The characteristics of the envelope are at the origin of the good acoustic comfort of the buildings: massive carrying envelope




Daylight factor : Not available

GHG emissions

• Building lifetime : 30,00 year(s)
• GHG Cradle to Grave : 105,00 KgCO₂ /m²

The calculations are taken from the reference document "Study on the Nubian Vault as a Construction Model - Final Report; p.40-46". The figure 105 KGCO2 / M2 corresponds to the phases "construction" and "building maintenance".