Natural Ventilation System for a School Building Combined with Solar Chimney and Underground Pit

The specific features of natural ventilation system combined with solar chimney andunderground pit installed in a new school building and the measured results for four years aredescribed. In summer and intermediate seasons outside air is introduced into the building offour stories through underground pit from the intake provided in the north end, brought intothe different occupied rooms from which the room air is discharged to outside through thesolar chimneys of 8 meters high above the roof by chimney action or pulling out action bywind. The measured results for four years after opening the school showed that the energyperformance has improved year after year owing to the natural ventilation system. Someconsideration on the improvements in the system performance is given for future design ofnatural ventilation with solar chimney.