Methods and methodological tools for the elaboration of natural ventilation strategy

The efficacy of a natural ventilation strategy is essentially conditioned by the sizing ofcomponents on which the airflow control depends. The indoor environment conditioning issubmitted to strict regulation. The implementation of the natural ventilation strategy is relatedto the building layout; therefore, the devices sizing is important for the architect. On the basisof the loop equation proposed by James Axley, we developed a simple sizing tool. Thistool relies on macroscopic airflow models through flow resistances of the natural ventilationcomponents written in the object-oriented solver Spark. The multizone dynamic programComis Trnsys permits achieving a coupled thermal airflow analysis of a sized ventilationsystem.