Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (6): 114-120.doi: 10.3969/j.issn.1000-565X.2014.06.018

• Architecture & Civil Engineering • Previous Articles     Next Articles

Effect of Sunken Plaza on Ventilation Performance of Underground Commercial Buildings

Guo Hao- xu Deng Meng- ren Li Yan   

  1. State Key Laboratory of Subtropical Building Science∥School of Architecture,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2014-02-17 Revised:2014-03-26 Online:2014-06-25 Published:2014-05-01
  • Contact: 郭昊栩(1972-)，男，博士，高级工程师，主要从事建筑设计及理论、建筑环境与人类行为及感觉等的研究． E-mail:hushkwok@126.com
  • About author:郭昊栩(1972-)，男，博士，高级工程师，主要从事建筑设计及理论、建筑环境与人类行为及感觉等的研究．
  • Supported by:

    国家自然科学基金资助项目(51278193);亚热带建筑科学国家重点实验室开放课题(2013kb18);中国博士后科学基金资助项目(2012m521602);中国博士后科学基金特别资助项目(2013T60805);华南理工大学中央高校基本科研业务费专项资金资助项目(2014zz0021)

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Abstract:

In order to overcome the development limitation of large- scale underground commercial buildings(UCBs) caused by mechanical ventilation mode,three large- scale UCBs being built in Guangzhou are taken as pro-totypes to discuss the interior ventilation of UCBs affected by the location of sunken plaza as a common entranceform of UCBs,with the implementation of hybrid ventilation as a point of penetration.Then,an analytical modelwith consistency is established through abstracting the prototypes,and the velocity vector distribution of airflow inthree model states is calculated via the CFD simulation of wind environment.Moreover,the interior air change rateof the samples is analyzed,and the regional thermal environment is discussed with WeatherTool,which helps to de-termine an effective domain of natural ventilation that fulfils the temperature and humidity requirements of humanbeing.Simulated results indicate that (1) suitable sunken plaza location and appropriate relative location of sunkenplaza to atrium may improve the air speed,airflow uniformity,comfortable sensation and energy efficiency in natu-ral ventilation state; (2) the heat absorption of fundamental parts helps to obtain a suitable air speed of UCBs inGuangzhou area; and (3) in the design of large- scale UCBs,ventilation simulation is necessary and beneficial.

Key words: sunken plaza, underground commercial building, hybrid ventilation, CFD simulation