Adaptive facade collectors for solar architecture

Within the German RnD project Arkol, two innovative facade collectors are being developed: a stripe collector and solar thermal venetian blinds.

From January 2016 until February 2020, the German research and development project Arkol developed two innovative facade collectors which give architects more degrees of freedom to design solar architecture: On the one hand side the strip collector  provides a high solar thermal performance while the material and the distance between the strips can be chosen within a broad range. On the other hand, Solar Thermal Venetian Blinds were developed. They are well suited within double skin facades, they can retract and tilt as conventional venetian blinds, but provide renewable heat and can reduce the solar heat gain coefficient (g value). Both technologies use heat pipes to collect the heat efficiently.

The follow-up project "DESTINI" continue the development of Solar Thermal Venetian Blinds aiming at an installation in a real building project with detailed performance monitoring.

Project coordinator: Simon Häringer, M.Sc.

© Fraunhofer ISE  © DAW SE/Karim Donath

Left: Demonstrator of the Solar Thermal Venetian Blind integrated into a double-skin façade element. © Fraunhofer ISE.

Right: Strip collector elements integrated into the demo facade. © DAW SE/Karim Donath.