Urban harvesting
Solar Trees
In Milan, the first seeds were sewed for innovation within solar energy. Since then our ‘solar trees’ from the German Expo Pavilion in 2015 have arrived at Merck’s Innovation Center where they are set to take root in cities around the world.
Time for change
The switch to renewable energies is inevitable. Factors such as climate change and dwindling energy reserves only act to reinforce this. That’s not to say that the potential of renewable energy sources isn’t still limited: The huge wind turbines dotted across our landscape feel somewhat alien, and endless solar parks just too vast.
More subtle solutions are needed to integrate renewable energy into cities and our everyday lives. It is precisely this challenge that we took up as part of Expo 2015. Together with Belectric, Carl Stahl, the Lapp Group, Hager and Merck, we sought to develop the first and only functioning photovoltaic steel cable web with organic solar cells, which might one day shape our urban landscape.
Effectiv and sustainable
Inspired by research into the “Discovery and Development of Conductive Polymers”, which was awarded the Nobel Prize in Chemistry in 2007, scientists have been developing organic photovoltaic technology. Unlike classic photovoltaics, OPV uses plastics made of carbon compounds as photoactive layers.
These can be produced using a printing process and have above-average performance values in low-light and difficult irradiation conditions. This is particularly beneficial when the site is not optimally positioned, making OPV solar systems up to 25% more effective than conventional ones.
“I am convinced that ecological awareness, innovation and design are not mutually exclusive. In the future, the energy efficiency of buildings and shells must play an integral part in every development. The theme of Expo 2015 “Feeding the Planet, Energy for Life” is just getting started in Milan!”
Thomas Burkard | Managing Partner at SCHMIDHUBER
The sky is the limit
This innovative technology has allowed us to develop a flexible system that offers virtually unlimited design and application possibilities. Buildings, public spaces, roofing on railway stations, squares, large open spaces or even mobile objects such as trucks could also be utilized.
The construction is quite simple
These can be affixed to buildings using existing masts or attachments. A circumferential frame construction is mounted, which supports the steel cable web. It is hung from this structure and can have a wide variety of mesh sizes: square, rectangular, triangular – even hexagonal, as demonstrated in the EXPO project.
Photos © Hans-Jürgen Lemp
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