Timeliness analysis of ventilation cooling in residential buildings in Xi’an

On the basis of related research in China and abroad, establishes a thermal comfort evaluation model of natural ventilation for residential buildings in Xi’an. Taking the typical residential buildings as research objects, carries out an indoor ventilating simulation analysis based on the latest 30 years’ climate data of Xi’an. Gains the overheat hours before and after using comfort ventilation. The comparison result shows that 40% operating hours of the air conditioners in summer can be reduced by natural ventilation.