Forum Chriesbach

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Eawag Dübendorf, Forum Chriesbach
Buildings in winter
Atrium
Atrium

The Forum Chriesbach is the main building of the Eawag , the Water Research Institute of the ETH Domain, and stands on the Empa -Eawag site in Dübendorf , Canton Zurich .

building

The administration and research building was built within two years according to strict sustainability requirements and moved into in June 2006. Forum Chriesbach is seen as a role model for a new, sustainable generation of buildings, has won numerous awards and is internationally recognized. In a study it could be shown that the building is economically cheaper than a comparable conventional construction after about 13 years, despite about five percent higher investment costs. What is special about Forum Chriesbach is that there is practically no heating or cooling and that there is still a pleasant room climate. With a heating requirement of 24 kWh / m² year, the building meets the highest requirements according to the current energy standard . The temperature regulation takes place mainly by heating the supply air and by automatic night cooling on hot summer days. Only a quarter of the thermal energy has to be supplied via the heating network of the Empa-Eawag area, the majority comes from internal heat sources such as the computer servers and the sun. The blue glass slats on the facade, which automatically track the sun, are mainly used for shading in summer. Almost a third of the electricity required (195,000 kWh in 2007) is generated in the photovoltaic system on the roof of Forum Chriesbach. The rest is generated in other Eawag solar power systems or purchased as green electricity with the naturemade star label. The electricity demand is dominated by the Eawag computer servers, which are all installed centrally in the basement of Forum Chriesbach.

Project

Eawag wanted to show by way of example that it is not only committed to the careful use of natural resources in its teaching and research, but also acts accordingly itself. According to the specification formulated in 2001, the building should go to the limits of what was feasible at the time of planning. The sister institution Empa, which was also involved in the construction, helped to define these limits. In 2002, the Bob Gysin + Partner BGP Architects team emerged as the winner with their “Vision” project in the competition for a study. The new building serves as a replacement for a rental property and for the spatial optimization of the Eawag building stock in Dübendorf. The Swiss parliament approved the loan of CHF 30,000,000 in 2003, and in April the general contractor mandate was awarded to Zschokke Generalunternehmung AG (now Implenia). The keys were handed over in June 2006. This was followed by a two-year optimization phase, during which the know-how of the planning and construction team was passed on to users and operators, defects were remedied and the control of the building services was optimized.

architecture

The room program of the Forum Chriesbach includes 165 office workplaces, a lecture hall for 140 people, two seminar rooms for 40 people each, various conference and meeting rooms with 106 seats as well as spacious communication areas in the atrium. The building also houses the shared library (Lib4RI) from Eawag, Empa, WSL and PSI and a staff restaurant certified with an organic label. The building is U-shaped with the open side facing south. The glazed south side and the roof of the atrium allow daylight to penetrate into the interior of the building as well as passive solar heat. The blue glass slats on the facade are mounted on the escape balconies. They shape the appearance of the headquarters of the Eawag water research institute. The reinforced concrete skeleton of the building has a temperature-equalizing effect and, together with the automatic night-time cooling and the clay walls, ensures a pleasant room climate. The media is supplied from two open riser zones on the building ceiling and ensures not only simple maintenance, but also flexible room layout. In the center of the atrium, the oversized model of a water molecule hangs as art on the building, onto whose transparent shell texts and images can be projected from the inside.

sustainability

energy

The basic principle in the planning was to first minimize the energy requirement and then find the best solution for the energy supply. The involvement of the Eawag environmental team and the future users in the formulation of the requirements for the new building was therefore obvious and resulted in the following requirements, among other things: As much daylight as possible at the workplaces; Heating and cooling only when and where there is a need; shared printing and copying machines; efficient office equipment; etc. A team made up of architects and specialist planners then took care of the integral planning in which the architecture and building services were carefully coordinated. In the Chriesbach Forum, the room temperature is controlled via the ventilation. Fresh air is sucked in via an earth register, preheated by the ground in winter and cooled in summer. With the cooling of the computer server, part of the fresh air is heated and thus contributes to the heating of the building during the cold season. If necessary, the heat from the exhaust air is also recovered and the supply air is heated with hot water from the central 12 m³ heat storage tank. This in turn is fed by the thermal solar system, the waste heat from the chillers in the staff restaurant and the area heating network. The building has a volume of 38,615 m³ and an energy reference area EBF of 11,170 m² (EBF0 = 8,270 m²). Forum Chriesbach's heat demand in 2007 was 106,410 kWh (9.5 kWh / m²). Of this, 63,971 kWh were drawn from the area's heating network and the remainder was provided by the thermal solar system (50 m² vacuum tube collectors) and the cooling machines. The electricity requirement was 238,000 kWh (21.3 kWh / m²) including the computer server. The photovoltaic system (459 m², 77 kWp) contributed 74,235 kWh to the power supply.

water

In the area around Forum Chriesbach, rainwater seeps into the groundwater either directly or via an infiltration basin. To flush toilets, the rainwater is directed from the roof into an open 80 m³ basin in the garden and from there it is pumped through a filter system to the toilets. In the Chriesbach Forum, in addition to waterless urinals, so-called NoMix toilets were installed in which urine is collected separately. In the basement, an Eawag research team is operating a pilot system to investigate processes for producing fertilizer from urine. The 1,300 liters of drinking water required per year in Forum Chriesbach are for the sinks and the staff restaurant. Findings from another Eawag research area were also implemented in connection with the new building of the Forum Chriesbach: the heavily built-up Chriesbach was revitalized and equipped with an open-air laboratory for training and demonstration purposes in the Eawag area.

Awards

  • 2008: Marketing + Architecture Award
  • 2008: AIT Office Application Award
  • 2008: Premio Internazionale Fassa Bortolo
  • 2008: Prime Property Award
  • 2008: Building Technology Award
  • 2008: Contractworld Award (shortlist)
  • 2007: World Clean Energy Awards (Nominee)
  • 2007: Watt d'Or
  • 2007: Velux Foundation, Daylight Award
  • 2006: Solar Prize
  • 2006: Swisspor innovation award

Individual evidence

  1. ↑ Zero Emission Building - Integrating Sustainable Technologies and Infrastructure Systems, A Case Study , R. Junge, Institute for Natural Resource Sciences, Zurich University of Applied Sciences, Switzerland (ZHAW), 2013
  2. ^ Reuss Engineering: Eawag Forum Chriesbach, Influence of energetic measures on life cycle costs. (PDF; 265 kB)
  3. ↑ Zimmermann, M., Gysin, B., Bundi, U., Janzi, G., 'Forum Chriesbach - from vision to sustainable reality Article', Empa Aktivities Journal, 2006, ISSN  1660-1394
  4. ↑ New standards in sustainable development ( Memento of the original from April 19, 2014 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. , BGP Architects, Zurich @1@ 2Template: Webachiv / IABot / www.bgp.ch
  5. ↑ Detailed energy balance of the Eawag Forum Chriesbach - final report, Federal Office of Energy, Bern, 2009
  6. ↑ Eawag Forum Chriesbach - Simulation and measurement of energy performance and comfort in a sustainable office building, B. Lehmann, H. Güttinger, V. Dorera, S. van Velsen, A. Thiemann, Th. Frank, Energy and Buildings, 2010, doi: 10.1016 / j.enbuild.2010.06.002 .
  7. ^ Forum Chriesbach, tab «Water»
  8. ↑ Novaquatis
  9. ↑ Vuna Project, University of KwaZulu-Natal
  10. ↑ Awards, BGP Architects, Zurich ( Memento of the original from April 19, 2014 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.bgp.ch

literature

Web links

Coordinates: 47 ° 24 '14 "  N , 8 ° 36' 34.6"  E ; CH1903:  six hundred and eighty-eight thousand three hundred eighty-seven  /  251001