The Ventilation Improvement Assessment of Sky Gardens-A Case Study of Hysan Place

Abstract

With the modernization and urbanization in recent decades, a mounting number of buildings has been built. Due to the limited land, these buildings were built higher and higher and side by side which created ‘Wall Effect’ blocking the wind and reducing air ventilation. It eventually led to bad thermal comfort of people. Therefore, sky gardens are increasingly important today, as they can significantly contribute to improving air ventilation by reducing ‘Wall Effect’. In order to know better about the influence generated by sky gardens to natural ventilation improvement, I selected the Hysan Place as a case study based on CFD simulation. I built two models --- the original model and the model without sky gardens for the simulation in different height. By comparison of different models, I found that the sky gardens of Hysan Place did can slight improve air ventilation of surrounding areas. Sky garden is an effective method to alleviate urban heat island effect, which is important to improve urban living quality, especially extreme high construction density.