Study on climate control of dwellings using underground air tunnel in cold regions (filed measurement on thermal effect of the ground using underground air tunnel for outdoor air intake for wintertime)

摘要

This passive winter air preheating technique utilizes the underground soil temperature, which stays fairly constant (about 10°C for wintertime) at a depth of 5 m. This study descries the winter air preheating performance of an underground air tunnel connected to a small-scaled test house in Kitami. The air tunnel was installed at a depth of 4.5 m. The results of these field measurements showed that underground air tunnels can reduce severe cold weather conditions in cold regions.