Thermal and Acoustic performance of superinsulated façade spandrel modules embedding Glass-Fiber Vacuum Panels

The development of highly performant pre-fabricated slim spandrel façade systems represents nowadays an important step to minimize the energy consumption of curtain wall buildings, towards the Zero Energy Building targets. In this context, the Powerskin Plus project is aimed at developing a new multifunctional slim façade spandrel modules that implement different functionalities i.e Solar Energy Harvesting by integrating Perovskite PV solar cells, energy storage by means of Phase Change Materials activated by an embedded heating systems and second life Li-ion batteries, and In this work, the thermal and acoustics performance of the systems has been analysed to support the design decision process. The thermal performance (U-value) and the sound reduction Level (Rw), were analysed by processing the physical properties (thermal conductivity and elastic modulus) of Glass Fiber based Vacuum Insulated Panels that were assessed in laboratory conditions. Results show a thermal transmittance ranging from 0.098 to 0.193 W/mK depending on the VIP thickness, and an Rw ranging between 25 and 45 dB, depending on the functional protective skin layers surrounding the VIPs.