adaptive facade, solar thermal collector, solar energy, renewable energy, shading system
A new facade type, called fluidglass, is under development for new buildings as well as to retrofit existing buildings. This new facade allows increasing the energy efficiency of the building as well as the comfort of people inside. The system works as a shading device, as a solar collector for supporting the hot water production and as cooling or heating device. Core of the system is a fluidized glass facade that controls the heat flux as well as the solar radiation through the facade. One or two fluid-filled layers are set into the glass facade. These fluid layers regulate the energy flows within the facade by being adjustable in transmittance. The outer layer is mostly for absorbing the solar radiation and the inner layer is for controlling the inner room temperature. Both layers are thermally separated by an insulation glass. The energy transmission as well as the lighting of the rooms can be regulated by pigmenting the fluid. For cooling and heating purposes the complete facade is available for heat exchange. So, only small temperature differences between room and supply temperature are required leading to high efficiency of A/C and heat pumping equipment. This paper will present the schematic and idea of fluidglass and the theoretical background. Furthermore, some simulation results about the fluid temperatures and the possible energy savings in buildings will be shown.