Wind data for natural ventilation design in Hong Kong

Abstract

The paper discusses what kind of wind data are required for natural ventilation design for residential buildings and the results of a statistical analysis on the wind data records measured from 1984 to 1998 at a weather station within an urban area in Hong Kong. In addition to the general patterns of wind speeds and directions, the study analysed the durations of stagnant periods. It was found that most stagnant periods lasted for only 1–2 h; the total duration of stagnant periods accounted only for 0.14% of the time in the 15 years; the durations between two consecutive stagnant periods were predominantly over 24 h; and the most frequent time of occurrence of stagnant periods was before dawn in the winter months.

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