ON THE EFFICIENCY OF NIGHT VENTILATION TECHNIQUES FOR THERMOSTATICALLY CONTROLLED BUILDINGS

A new, integrated method to calculate the energy contribution of night ventilation techniques to the cooling load of a building is presented in this paper. The method is based on the principle of ''Balance Poin t Temperature'' and permits the calculation of the energy required to cool a building to acceptable comfort conditions when night ventilatio n techniques are used. It also permits the calculation of the energy c ontribution of night ventilated buildings compared to conventional air conditioned buildings. The proposed method is successfully validated with data from an extended and detailed simulation procedure using the TRNSYS simulation programme to calculate dynamically the thermal perf ormance of buildings using night ventilation techniques. It is found t hat the method is of sufficient accuracy and can be used during the pr edesign as well as the design phase of a building to access the perfor mance of night ventilated buildings. Copyright (C) 1996 Elsevier Scien ce Ltd.