Modelling the performances of an innovative shading device integrating PV

This study presents a first assessment of the overall energy performances of a novel BIPV facade systems. Specifically, it focuses on an innovative extensible louvre integrating PV. A suitable optical model was developed, and validated against Window software, for characterizing the bidirectional properties of the complex fenestration system (CFS), having a peculiar shading geometry and combination of PV and blind surfaces. The CFS characterization and the control strategy, for regulating louvre tilt and extension, were implemented in EnergyPlus via EMS, for simulating heating cooling and lighting needs. PV generation was modelled taking into account partial shading effects. The integrated building and PV simulation and the introduction of an overall energy performance index allow to optimize the control strategy. The results show that for a South facing typical office module in Milan the new BIPV system, beside the relevant RES exploitation, is able to provide effective solar control, without compromising daylighting.