Paper Conference

Proceedings of BauSim Conference 2022: 9th Conference of IBPSA-Germany and Austria


Airflow through a facade greening system equipped with vertical photovoltaic modules

Theresa Paskert, Hayder Alsaad, Conrad Voelker

Abstract: Using computational fluid dynamics (CFD), this study investigates airflow through a façade greening system equipped with photovoltaic modules. ANSYS Fluent was used to perform steady-state simulations with two-dimensional models. The characteristics of airflow through the vegetation were considered by applying user defined functions (UDF) to the vegetation areas; these UDFs were validated for three k-ε models. The impact of the surroundings roughness was explored using different roughness length values z0 and using geometrical roughness modeling. Results indicated that compared to an air velocity of about 0.60 m/s at the bare façade, velocities within the greening system varied around 0.15 m/s to 0.50 m/s.