Thermal—Airflow Coupling in Hourly Energy Simulation of a Building with Natural Stack Ventilation

Natural ventilation dominates in Polish residential buildings. It is a simple and low-cost system but its performance affected by varying environmental conditions. Hence, setting up constant airflow results errors when calculating heating cooling energy. In this paper, an attempt to integrate the buoyancy effect natural of building at hourly resolution with simulation method EN ISO 13790 obtain energy use for space presented. The ping-pong coupling algorithm was proposed applied. Hourly variation rate from ?26.8 m3/h (flow outdoor interior building) 87.2 55 on average. lack resulted overheating during summer indicated necessity application or other techniques reduce solar gains. Application ?38.0 m3/h. Detailed EnergyPlus statistical analysis proved applicability stack-induced assessment. coefficient determination R2 = 0.936, mean squared error MAE 5.72 root square RMSE 7.86