jailcd2024036: The Practice of Natural Ventilation Strategy in Respect of Low Carbon Building Design

Abstract

The construction sector is increasingly focusing on low-energy buildings to reduce fossil fuel dependency. Specifically, natural ventilation strategies, which require no primary energy, low energy, low cost, low maintenance and high health benefits, are garnering significant attention. Consequently, improving passive ventilation has emerged as an effective approach to enhance spatial cooling in urban buildings. However, practical applications face limitations, such as extremely high outdoor temperatures, inconsistent ventilation volumes, unable to guarantee that there are households on the air supply temperature, humidity, level of cleanliness requirements. This research, centered around a passive building at Xi'an Jiaotong University with four different locations and sizes ventilated chimneys, examines the area's climate characteristics. Its goal is to present green ventilation techniques and the cooling effects of natural energy in the building. The study examines four ventilation systems: a) solar-thermal driven chimney enhanced ventilation system; b) combined pre-cooled underground pipe gallery and built-in chimney system; c) shallow ground heat exchanger-integrated underground pipe gallery ventilation. These varied ventilation methods overcome the seasonal constraints of natural ventilation, aligning with low-energy building development needs. Future research will build upon this study to guide the implementation of improved natural ventilation in green buildings.