Study of cross- ventilated indoor air flow characteristics by frequency analysis

In Japan where is located at the hot humid climate region, houses have been built considered hot summer life from ancient times. It is said that comfortable and cool feelings by cross-ventilation were more important. However, the characteristics of cross-ventilated air flow are unclear, and that it has yet to be revealed how they affect the psychological and physiological factors that influence comfortable feeling. So, in this study, time-series data of cross-ventilated indoor air flow velocity were measured by field measurement at the actual detached house in Japan. Various turbulence statics of cross-ventilated indoor air flow were investigated by with frequency analysis (FFT). As a result, they were observed that wind velocity, eddy size and power spectrum configuration are different in and out of the cross-ventilated air flow pathway.