A good climate – combining innovative concepts with aesthetics and environmental protection

Aesthetics and environmental protection are not mutually exclusive. On the contrary: The exterior of the Philological library is not only appealing, but also energy efficient.

One of the main challenges was to reduce the energy consumption of the ventilation system. Taking into account health aspects for the visitors as well as preservation requirements for books, the library constantly has to be around 21 to 22 degrees Celsius. Instead of air-conditioners, the “Berlin Brain” uses, through a special building construction, wind and solar energy. Operating costs can thus be reduced by 35%.

A double layered base takes care of fresh air during summer while consumed air is exchanged through a folding system on the top of the roof. In order for this to work are glass panels installed at the southern side of the building. These heat up the trapped air between the outer and inner layer of the walls. Therefore, the air flows upwards and pushes against the folding system.

Wind energy is utilized through the strategic placement of the building. Berlin mainly has westerly airflow. Fresh air is pressed into the library on the western side, while the resulting pressure difference sucks out air on the East. Lastly, water hoses built into concrete slabs can be heated up or cooled down as needed. Overall, these measurements lead to natural ventilation on about 60% of the year.

However, as a last resort, there is also a mechanical ventilation system. Fortunately, this is only needed 8 to 10 days per year, which is highly appreciated by those who value a pleasant indoor climate.

Aus:
Freie Universität Berlin "Neues aus Wissenschaft und Forschung"
Eine Beilage der Freien Universität Berlin in Zusammenarbeit mit DER TAGESSPIEGEL
Mittwoch, 14. September 2005 / Nr. 18955
Text: Barbara-Ann Rieck