Austria’s first commercially used plus-energy building significantly contributes to achieving Vienna’s climate protection goals. Another two buildings with an area of about 10,000 sq.m. are already planned.
With the first building of the Technology Centre Seestadt, which was completed by the Vienna Business Agency in August 2012, not only a major contribution to the development of the Seestadt Aspern was made, but is was also Austria’s first commercially used plus-energy building. By optimising the energy balance and an almost complete ecological construction, the Vienna Business Agency is making a significant contribution to the achievement of Vienna’s climate protection targets.
The project’s stated aim was that the building achieved a plus-energy standard over the year. This means: at full capacity, the building generates more energy than it consumes. Besides this, the intention was to achieve a minimum of 700 points of the klima:aktiv building standard.
klima:aktiv is a quality assessment for buildings that meet the highest energy efficiency, environmental and comfort standards. It recognises residential and service buildings throughout Austria that have achieved the highest standards of planning and operation quality, quality of building materials and construction, as well as comfort and indoor air.
Facts and Figures
- Usage: offices, operational and commercial areas, seminar rooms, restaurant
- Net area: approx. 10,620 sq.m.
- Commencement: June 2011
- Completion: August 2012
- Budget: approx. € 15 million
In order to meet the expectations of Viennese companies in regards to producing within the city and industry 4.0, the Technology Centre Seestadt is going to be expanded by two buildings. With an additional 10,000 sq.m. new space and the appropriate infrastructure is created to smooth the way for tech-savvy companies towards new automatisation and manufacturing techniques. After the expansion the Technology Centre Seestadt is going to cover approximately 17,000 sq.m.
Methods used for the plus-energy building
Already during the design and construction phase some actions were taken in order to consistently work in a environmentally and climate friendly manner. For instance, the entire shell was made from eco-concrete (consisting of: blast furnace slag, sulphate agents and special additives). With an effective area of approximately 6,500 sq.m., around 1,000 tons of CO2 could be saved by choosing eco-concrete over conventional concrete.
In order to minimise the energy supply on site even further, the demand for primary energy was reduced with the following measures:
- a highly insulated shell with optimised thermal bridge
- building services at passive house standard, demand for primary energy reduced by:
- ventilation system (energy recuperation plus 90%)
- air exchange controlled by CO2 sensor (depending on demand)
- LED lighting
- energy on site
- thermal energy using geothermal power
- electricity from photovoltaic panels (1,300 sq.m., 140 kilowatt peak)
- internal server room loads are recuperated using small heat pumps and buffer tanks and then used to heat the rented areas
- product management implemented in order to lessen the environmental impact of building materials and reduce emissions
For quality assurance purposes, an assessment was undertaken throughout the design phase in accordance with klima:aktiv and the Total Quality Building Tool of the Austrian Sustainable Building Council (ÖGNB). This assessment, undertaken during the design phase, helped achieve the building’s high quality. At the end of the project, the klima:aktiv assessment resulted in Austria’s first 1,000 points klima:aktiv commercial building (the initial target was set at 700 points). An outstanding result with 944 points was also achieved in the ÖGNB preliminary assessment. This result was even exceeded in the final assessment with 974 points.
On 1 April 2014, the project received the EU Green Building Integrated Design Award.
Website: Technology Centre Seestadt
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