Benchmarking clear sky and transposition models for solar irradiance estimation on vertical planes to facilitate glazed facade design

• DOI: 10.1016/j.enbuild.2021.111622
• Publication Date: 2021-11-06T01:38:58Z
• Authors: Debayan Paul; Giuseppe De Michele; Behzad Najafi; Stefano Avesani
• Keywords: Facade; Glazing

The present study aims to benchmark the models utilized for estimating solar irradiance on vertical planes that can facilitate determination of critical conditions, which are in glazed facade design. Accordingly, first part study, performance PVGIS databases Europe components horizontal surfaces is compared with on-site measurements at Bolzano airport (Italy). It demonstrated PVGIS-SARAH estimates both global and diffuse components, measurements, an acceptable error range (± 2–5%). accuracy isotropic anisotropic transposition then same location, demonstrates model tends underestimate incident by 6–12% daily peak value, while agreement between estimations Perez observed. Next, Ineichen, Solis SPECMAGIC clear sky models, transposed model, have been assessed utilizing field facades four different locations Europe. broadband version R2 scores 0.85 0.95 considered locations, indicating this approach be as alternative open-source/commercially available data sources estimate facades. Finally, case a triple glazing system, comparing surface temperatures obtained employing latter those determined using other commonly shows discrepancy up 7 °C.