Ariana, Tunisia
NIDA Teleworking Centre.
The NIDA Outsource Centre built a Teleworking Centre in the El Ghazala Technology Park, Ariana in 2009. This office building comprises 5 floors and has in total a built-up area of 6000 m². The main measures to save energy are thermal insulation of roofs and exterior walls, the use of double glazed windows, the installation of window shades, the use of an energy efficient lighting system, and the use of an energy efficient heating and cooling system. The implementation of thse measures has resulted in an annual energy savings of electricity of around 260 MWh.
Project info
- Construction phase
- New construction
- Building type
- Non-residential building
- Detailed building type
- Office
- Net floor area
- 6000 m2
- Land plot size
- 10395 m2
- Stories
- 5 stories
- Construction type
- Mixed construction
- Original construction year of the building
- 2009
- Project contact
- NIDA Company
- Contact email address
- contact@nidatunisie.com
Project team
- Developer(s)/owner(s)
- NIDA Outsource Centre
- Architect(s)
- Mr. Lassad Bouzid & Mr. Mohamed Haj Taib
- Energy efficiency consultant(s)
- Arch. Ibtissem Cherif and Eng. Adel Gabsi
Building Rating and Certifications systems
- Rating and certifications systems
- Other
- Other certification
- The building has acheived the third rating in accordance with the Tunisian Thermal Regulation
Building Envelope
External walls
- Description of construction
- First is 39cm thick with 2.5cm ext cement, 15cm 12hole brick, 4.5cm Glass Wool insulation, 15cm 12hole brick, 2.5cm int plaster. Second 31cm thick with 2.5cm ext cement, 15cm 12hole brick, 4.5cm Glass Wool, 6.5cm 8hole flat brick, 2.5cm int plaster
- U-Value
- 0.504 W/(m²*K)
Roof
- Roof type
- Flat roof
- Description of construction
- roofs have the following layers: 1.5cm interior coating, 25cm of 19cm hollow-body plus 6cm armoured concrete, 10cm minimum thickness aerated concrete for slope, 0.5cm waterproofing membrane, 3cm aerated concrete, and 2cm tile layer.
- U-Value
- 0.92 W/(m²*K)
Openings and windows
- Glazing type
- Double glazed
- U-Value glass
- 3.16 W/(m²*K)
- Frame material / description
- The frames are constructed using standard aluminium.
- Overall u-value window
- 3.17 W/(m²*K)
- Description of construction
- The window bays are constructed using standard aluminium frames and double glazing of 6/6/6 mm thick and of the stopsun type.
Basement floor
- U-Value
- 2.192 W/(m²*K)
Technical Building Systems
Ventilation system
- Type of ventilation
- Free ventilation (windows)
Space cooling system
- Primary space cooling system
- reversible air-water heat pumps
- Efficiency
- 3.2
- Description
- The building's cooling is provided by reversible air-water heat pumps with communicating regulators, connected to a centralized supervision system. The heat pumps connect to fan coil units, each with electronic controls linked to the central system.
Space heating system
- Primary Space heating system
- Heat Pump (air-water)
- Description
- The building's space heating is provided by the same system of reversible heat pumps.
Water heater system
- Primary water heater system
- Dedicated electric heater (dedicated = just hot water generation)
- Description
- Domestic hot water is used just for the needs of the hand wash basins.
Lighting system
- Primary lighting system
- Linear fluorescent lamps (LFL)
- Efficiency
- 95
- Secondary lighting system
- LED (Light emitting diode lamps)
- Description
- T5-type LFL luminaires with electronic ballasts are used for internal lighting. Basement car park lighting is provided by LED projectors with motion detectors. Exterior lighting circuits have programmable twilight switches for Energy-E control
Shading devices
- Type of shading system installed
- Static (fix) shading systems as part of the building architecture (e.g. Maschrabiyya, porch roofs, pergolas)
- Description
- Sunshades made of aluminum slats mounted on external walls are used to mitigate the impact of solar irradiation entering the building through the South-West and North-West facing bay windows.
Final Energy Demand
- Energy carrier (1)
- Electricity
- Total specific final energy demand
- 94 kWh/(m²*a)
