The Effect of the External Driving Forces Modelling on the Calculated Building Energy Need Through the Use of Dynamic Simulation

An extensive validation of the EN ISO 52016-1 hourly method is still missing. In this paper, the main modelling assumptions related to the envelope outdoor surface heat balance are analysed. The variation in the accuracy of a detailed dynamic model is assessed when the EN ISO 52016-1 assumptions are applied to the model. To guarantee a general validity of the outcomes, two case studies in three Italian cities are considered. The results showed that the assumptions related to the definition of the convective and radiative heat transfer lead to nonnegligible variation in the energy needs