Tuesday, July 14, 2009

Germany's Bauhaus University designs solar-powered cinema

The innovative 'Screenhaus.SOLAR', a modern movie theatre powered by solar technologies, will open in early July 2009 at Germany's Bauhaus-Universität in Weimar. The theatre seeks to demonstrate how architecture and civil engineering can interact with renewable energies and offer functioning, resource-saving solutions worldwide.

The team led by Professors Jürgen Ruth and Rainer Gumpp at the Bauhaus-Universität Weimar wanted to create a climate-neutral, easy-to-set-up, yet sophisticated design consisting of renewable materials for the temporary building, Screenhaus.SOLAR. The resulting design is adaptable and easy to use worldwide.

The hull of the 13-metre long structure is both flexible and stable as a hyperboloid structure in three dimensions, two together at the tips of the converging cone. In order to achieve this form, wooden struts were selected and connected to create a strong honeycomb-like structure.

The real highlight of the Screenhaus.SOLAR is, however, the flexible photovoltaic modules, that are affixed to the honeycomb structure. Unlike rigid photovoltaic elements, these solar cells fit the elements of the latest generation of solar cells that envelope the building almost like an item of clothing.

This so-called solar-envelope, the roof system, delivers the electricity required throughout a night of cinema. During the day, the modules convert the sunlight into electrical current and feed it into the general network. The energy produced is then used to power the operation of the cinema during the evening hours.

“The goal is to provide the climate neutral screening of films exclusively from the captured sunlight,” explains Roth. “In the construction phase itself, the positive energy balance played a role for us. So it was necessary during the building work to also use solar energy.”

A structure well-suited for emergencies

The issue of resource conservation impacted the entire project. The wooden struts for the construction came from a wind power plant that was built in the past year on the campus of the Bauhaus-Universität Weimar. Moreover, the draft of the screen house is easily transferable to other countries and continents. The structure can be completely dismantled and then easily transported in standard containers for use anywhere in the world.

The structure is created from simple, linear elements, allowing it to be built anywhere in a short time by non-professionals. This is particularly important in areas with weaker infrastructure or following a destructive event. In such situations, the Screenhaus can be used as emergency shelter or as a temporary hospital. The insulation can, if necessary, be easily retrofitted.

"The idea to build a climate-neutral integrated work of art came to us when contemporary construction projects were being sought for the Bauhaus-Jubilee 2009,” says Ruth. “Since we have already received a positive response from all sides with our wind power project, we wanted to further develop this concept.” Professors Ruth and Grumpp used the 5,000 euros in prize money they received for their wind project in 2008 in the framework of the Dr. Tyczka Energy Prize for development of the Screenhaus project.

The Screenhaus.SOLAR will open on 9th July with a screening of a student short film about solar power.

Source: www.german-info.com

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