Permeability, porosity and better ventilated design for high density cities
Refereed conference paper presented and published in conference proceedings


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AbstractIn a high density city, given the need to accommodate a fix amount of building volume, what can one do to optimise the benefits of the natural (air) environment? The parameters of building density, building heights, and building height differences have been earlier reported in PLEA 2003, 2004 and 2005 respectively. The experiment has continued. It is hypothesised that in densely built cities, the amount of gaps, permeability and porosity will affect the ventilation / wind environment. Using wind tunnel, experiments are conducted with different amount and positions of gaps of a simplified city layout. The Air change potentials of buildings, an indicator of the air ventilation potential of the urban environment, as well as the air speed at pedestrian level are calculated. It can be established that a cityscape with more gaps will perform better. But it is noted that the characteristics instead of the amount of gaps are more important parameters. Based on the investigation, a number of guidelines were established. It can be reported that the Government of Hong Kong has incorporated them into their Hong Kong Urban Design Standard and Guidelines (HKUDSG). The findings will affect policies and design of developments. Some issues of the implementation procedures will be reported.
All Author(s) ListNg E., Wong H.-H., Han M.
Name of Conference23rd International Conference on Passive and Low Energy Architecture, PLEA 2006
Start Date of Conference06/09/2006
End Date of Conference08/09/2006
Place of ConferenceGeneva
Country/Region of ConferenceSwitzerland
Detailed descriptionorganized by Universite de Geneve,
Year2006
Month12
Day1
LanguagesEnglish-United Kingdom
KeywordsUrban design, Wind environment

Last updated on 2020-08-07 at 02:29