Stakeholders

Function : Designer

Manuel Sánchez Iturbe

[email protected]; tf: 669809556; Zaragoza

Function : Facility manager

Octavio Cabello Villalobos

[email protected]; tf:657553330; Zaragoza

Function : Designer

Javier Gracia Martinez

tf: 678361306

Function : Designer

Aurora Sánchez Iturbe

[email protected]; tf: 609.311.680

Contracting method

Other methods

Owner approach of sustainability

As a part of the Digital Mile project, Zaragoza City Council seeks to convey an image of sustainability through the first nZEB building in Aragon.

Architectural description

The CIEM building is a “zero emissions” designed to function as a business incubator. It is located in the area close to Delicias Train Station, Zaragoza, opposite the CAT (Center for Art and Technology) , in a park called Parque Equipado 1, which will form part of Zaragoza Digital Mile in the future. The passive (construction) and active (facilities) design elements work in harmony; they were not designed to be rigidly separate compartments. As such, the integrated design phase, composed by a multidisciplinary team, was one of the main features in this project since the design phase. The building is constructed around an atrium. This central space was not conceived to be a residual space; it is the spatial, functional and environmental heart of the building. It lets natural daylighting filter inside and is the centre of transit and a place for casual meetings. It also serves as a thermal and acoustic buffer between the outside and the inside and acts as bioclimatic resource. The CIEM´s simple form is cubic, wrapped in a double façade that regulates outdoor lighting, air conditioning and the ventilation of the interior spaces. The shape of the building is the result of an environmental strategy that harnesses cutting-edge technology to create an excellent working environment. The objective is to achieve optimal energy efficiency whilst also providing optimal comfort and applying bioclimatic criteria. The entire building has been oriented in the direction that makes best use of the external climate to benefit the interior climate. Because Zaragoza has extreme temperatures, in both summer and winter, the building captures or rejects outside heat, stores it and distributes it at the right time. These systems are controlled by an automated system with openings located in the double skin of the façade and the in upper courtyard. It is designed in line with passive architecture criteria, building systems that achieve optimal energy savings, working in conjunction with the air conditioning with floors and walls with high thermal inertia made from reinforced concrete and with insulation. Thanks to the double skin, in addition to thermally insulating the building, any infiltrations of unwanted air are prevented. The south facade harnesses solar radiation for the production of solar energy through thin-film photovoltaic panels. Moreover, the roof is protected from direct sunlight thanks to the shading provided by the photovoltaic panels.

If you had to do it again?

Given the issues arising from changes in legislation on the use of renewable energy in Spain, I would consider another solution focussing on auto-consumption with total or partial independence from the power grid.

Building users opinion

The building has an occupancy level of almost 100% which gives an indication of user satisfaction.

Energy consumption

• Primary energy need : 49,80 kWhpe/m².year
• Primary energy need for standard building : 85,50 kWhpe/m².year

Calculation method : RD: 47/2007

• Final Energy : 79,00 kWhfe/m².year
Breakdown for energy consumption :

AIR CONDITIONING: 25.79 kWh/m2/yr
VENTILATION: 11.77 kWh/m2/yr
LIGHTING: 12.32 kWh/m2/yr


More information :

The energy consumption statistics shown are those measured in 2012, prior to the optimisation of the air conditioning systems and lighting. After analysing the results and observing the performance of the building, it has been discovered that this consumption can be reduced by a further 40%.

Envelope performance

• Envelope U-Value : 0,29 W.m^-2.K^-1
More information :

Façades: 0.29 w/m2K
Roof 0.39 w/m2K
Floor : 0,333 w/m2K
Curtain wall: 5.8 w/m2K
Interior glass: 2.8 w/m2K
Curtain wall system with air chamber: 1.36 w/m2K


• Building Compactness Coefficient : 0,19

Indicator : HE1 BD

• Air Tightness Value : 27,00

Systems

Heating system :
• Geothermal heat pump
• Others
• Radiant ceiling
• VAV System
• Others
Hot water system :
• No domestic hot water system
Cooling system :
• Geothermal heat pump
• VAV Syst. (Variable Air Volume system)
• Floor cooling
• Radiant ceiling
• Others
Ventilation system :
• Natural ventilation
• Nocturnal ventilation
• Nocturnal Over ventilation
• Single flow
• Double flow heat exchanger
 Utilizacion de tubos canadienses y efecto invernadero. Uso de sistema de climatizacion con difusion por desplazamiento

Renewable systems :
• Solar photovoltaic
• Heat pump (geothermal)
• Micro wind
• Biomass boiler
• Renewable energy production : 70,00 %

Smart Building

BMS :

The management system is designed not only to act on the various systems, but to gather as much information as possible in order to study their performance.

GHG emissions

• GHG in use : 16,50 KgCO₂/m²/year
Methodology used :

In order to determine the CO2 emissions, both the consumption of the building systems (lighting, air conditioning... ) as well as that of the users (work stations) has been taken into account. Aspects such as the life cycle were not take into account.

• Building lifetime : 50,00 year(s)

Water management

Water Consumption/m2 : 0.15

Water Consumption/Work station : 3.18

• Consumption from water network : 350,00 m³

Indoor Air quality

The air conditioning system is of the "100% outside air" type, which means that 100% of the treated air is drawn from outside after being filtered , meaning that there is no recirculation of air. The displacement diffusion system prevents the concentration and dispersion of pollutant gases in the building.

Product

ALUMINUM EXTERIOR CARPENTRY



NORVENTAL

Pol. Ind. Monzú. C/ Gibraltar 44 - 46, Huesca; Tf: 974 24 12 93

 http://www.norvental.com/


Product category :

Norvental has managed to integrate photovoltaic panels and screen printed glass into the glass façade systems. The interplay between the different emissivities of the inner and outer glass allows us to achieve a strong greenhouse effect in the double façade, whilst allowing us to reduce the penetration of direct radiation into the inhabited areas.

It has given us an easy to implement and durable solution, which definitely solves the airtightness of the building

THERMAL INSULATION ISOVER IBR-80



ISOVER

+34 901 33 22 11;

 http://www.isover.es/


Product category :

THERMAL INSULATION OF THE ENVELOPE BY MEANS OF 8CM GLASS WOOL

Good thermal and acoustic insulation. Easy to install and economical.

MONOCRYSTALLINE PHOTOVOLTAIC PANELS



SUNPOWER

+34 917820746

 http://www.sunpowercorp.es/


Product category :

MONOCRYSTALLINE PHOTOVOLTAIC PANELS; SUNPOWER SPWR300

HIGHLY EFFICIENT PHOTOVOLTAIC PANELS, 300Wp

Vertical Wind Turbines: Urban Green Energy UGE-4K



URBAN GREEN ENERGY

 http://www.urbangreenenergy.com/


Vertical wind turbine power 4 kW

Vertical wind turbines with very low noise pollution, able to harness the wind power potential in areas of high turbulence, as in the case of an urban setting.

Urban environment

The building is located on a plot of 3,004 m2 and occupies 23% of this. The rest comprises green areas and gardens. It is next to the CAT (Center for Art and Technology), close to Zaragoza Delicias Train Station. It is close to a hotel and shopping area. To the north of the site are the premises of the former Expo Zaragoza 2008. It is well-connected to one of the main gateways to Zaragoza and is very close to the high-speed train (AVE).

Land plot area

Land plot area : 3 004,00 m²

Built-up area

Built-up area : 23,00 %

Green space

Green space : 108 000,00

Parking spaces

The CIEM has its own car park with space for 21 cars, and nearby there is lots of space in the former south car park of Expo Zaragoza 2008.