Stakeholders

Thermal consultancy agency

Bureau d'Etudes Alain Garnier
Frédéric Ronfort

Contracting method

General Contractor

Owner approach of sustainability

The Owner wanted an exemplary building in terms of energy performance and achieve a commercial complex that is a showcase dedicated to sustainable development, while meeting the expectations of future tenants in terms of environmental quality. The objective was to show that, even in the context of a shopping center that has a bad reputation regarding its regular environmental footprint, we can make efforts to preserve the planet by choosing ingenious systems to save energy.

Architectural description

The architecture of One Nation Paris was designed by the firm of architects AWO. The architect, Gregory Genaux designed the mall around the light and natural lighting. This building has a contemporary architecture, sleek design, raw materials: the envelope of One Nation Paris "is organized around three elliptical and majestic patios, enrolled in a set of curves defining the visitor walks. These shapes of glass and concrete and free fluids create, in every corner of the building, luxurious bright and grandiose spaces, ."

Energy consumption

• Primary energy need : 53 kWhep/m².an
• Primary energy need for standard building : 113 kWhep/m².an

RT 2005

Envelope performance

• Envelope U-Value : 1 W.m^-2.K^-1

Systems

Heating system :
• Condensing gas boiler
Hot water system :
• Individual electric boiler
Cooling system :
• Water chiller
Ventilation system :
• Double flow heat exchanger
Renewable systems :
• Other, specify
• Renewable energy production : 30 %

HEATING OF COMMERCIAL SPACES
Heating is provided by two gas condensing boilers with modulating gas burners with oxygen control.

VENTILATION OF SPACES
The indoor air is treated with air handling units incorporating energy recovery exchanger with a thermal efficiency of 85%.

When the outside temperature drops below 12 ° C, we produce chilled water without turning on the compressor of the water chiller groups: water is directly cooled by the outside air. The whole air-conditioning systems (networks, cassettes, winnable units, ...) have been dimensioned to operate in a 13/18°C water regime to maximize the free-chiling rather than in a 6/12°C. water regime.

Solutions enhancing nature free gains : Consumption due to air conditioning which is the largest energy position (far ahead of heating consumption) has been optimized through chilled water production groups allowing operation in free cooling.

Smart Building

BMS :

A centralized technical management system is used to manage heat and cold production, monitor the energy consumption of the building and manage the lighting of the mall

Product

Chilled water unit with Free Cooling
Climaveneta
Monsieur Philippe Pineau

HVAC, électricité / ventilation, cooling

Outdoor unit for the production of chilled water, equipped with semi-hermetic screw compressors dedicated for the use of R134a.
High efficiency of operation of the chiller.

These ice water production units are equipped with FREE COOLING batteries. When the cooling load demand is continuous during the winter season or in any case when the outside temperature is less than the return liquid temperature of the installation.

In FREE-COOLING mode the fluid is cooled by the outside air, reducing the work of compressors; can even cancel completely the work of the compressors.

This process allows energy savings without compromising user comfort

Construction and exploitation costs

• Renewable energy systems cost : 900 000 €

Urban environment

One Nation is located in the local commercial area "Grand Plaisir". An upscale shuttles service was set up from Versailles and the Paris Opera House in Paris during the week and on weekends. Specializing in fashion and luxury brands, it includes shops dedicated to streetwear, lifestyle and sport, premium brands (Armani, Courrèges, Zadig & Voltaire, Cacharel, etc ...) and restoration with 3 restaurants and 2 chocolatiers.
Structured on 2 levels, the center and its shops offer 90 collections from the previous season prices "outlet".

Parking spaces

1,250 parking lots

Building Environmental Quality

• indoor air quality and health
• works (including waste management)
• comfort (visual, olfactive, thermal)
• energy efficiency
• mobility