Energy Performance Evaluation of a Ventilated Façade System through CFD Modeling and Comparison with International Standards

Ventilated façades can help to reduce summer building thermal loads and, therefore, energy consumption due air-conditioning systems thanks the combined effect of solar radiation reflection and natural or forced ventilation into cavity. The evaluation ventilated behavior performance is complex requires a complete thermo-fluid dynamic analysis. In this study, computational fluid (CFD) methodology has been developed for assessment prefabricated timber–concrete composite façade module in different operating conditions. Global numerical results are presented as well local ones terms heat flux, air velocity, temperature inside show dependency envelope efficiency on radiation, benefits that convection brings potential savings importance designing an optimized geometry. concerning have thoroughly compared with International Standards, showing good accuracy model respect these well-known procedures. This comparison allowed also highlight Standards procedures limits evaluating necessary level detail, risk leading design faults.