Using Manipulating Urban Layouts to Enhance Ventilation and Thermal Comfort in Street Canyons
Authors: Su Ying-Ming
High density of high rise buildings in urban areas lead to a deteriorative Urban Heat Island Effect, gradually. This study focuses on discussing the relationship between urban layout and ventilation comfort in street canyons. This study takes Songjiang Nanjing Rd. area of Taipei, Taiwan as an example to evaluate the wind environment comfort index by field measurement and Computational Fluid Dynamics (CFD) to improve both the quality and quantity of the environment. In this study, different factors including street blocks size, the width of buildings, street width ratio and the direction of the wind were used to discuss the potential of ventilation. The environmental wind field was measured by the environmental testing equipment, Testo 480. Evaluation of blocks sizes, the width of buildings, street width ratio and the direction of the wind was made under the condition of constant floor area with the help of Stimulation CFD to adjust research methods for optimizing regional wind environment. The results of this study showed the width of buildings influences the efficiency of outdoor ventilation; improvement of the efficiency of ventilation with large street width was also shown. The study found that Block width and H/D value and PR value has a close relationship. Furthermore, this study showed a significant relationship between the alteration of street block geometry and outdoor comfortableness.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1131325Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 749
 Annie Hunter Block, Stephen J. Livesley, Nicholas S. G. Williams “Responding to the Urban Heat Island: A Review of the Potential of Green Infrastructure”, Victorian Centre for Climate Change Adaptation Research, 2012.
 Lin Yu-Lu, “A simulation study of urban heat island effect remission”, Master Thesis, Department of Energy and Refrigerating Air-Conditioning Engineering National Taipei University of Technology, Taipei, 2009. (in Chinese).
 Hsu Hong-Yi, “A analysis of stragedy effectiveness of urban heat island effect-take Mingcneng west road area as an example”, Master Thesis, Department of Architecture, Tamkung University, Taipei, 2012. (in Chinese).
 Mu Li Zhi Zi, Xiao Ye Jia Zhi, Pian Gang, Hao Ren, Chuan,Kou Zhang Jiu, “Obayashi Corporation Technical Research Institute Report N0.69, Japan: Obayashi Corporation Technical Research Institute. (in Japan)” Evaluation Technology of wind environment, 2005.
 Marcel Ignatius. Nyuk Hien Wong. Steve Kardinal Jusuf, “Urban microclimate analysis with consideration of local ambient temperature, external heat gain, urban ventilation, and outdoor thermal comfort in the tropics”, Sustainable Cities and Society Volume 19, December 2015, Pages 121–135.
 Jonas Allegrini, Viktor Dorer, Jan Carmeliet, “Coupled CFD, radiation and building energy model for studying heat fluxes in an urban environment with generic building configurations”, Sustainable Cities and Society Volume 19, December 2015, Pages 385–394.
 Rubina Ramponi, Bert Blocken, Laura B. de Coo, Wendy D.Janssen, “CFD simulation of outdoor ventilation of generic urban configurations with different urban densities and equal and unequal street widths”, Building and Environment Volume 92, October 2015, Pages 152–166.
 Jian Hang, Yuguo Lia, Mats Sandbergc, Riccardo Buccolieri, Silvana Di Sabatino, “The influence of building height variability on pollutant dispersion and pedestrian ventilation in idealized high-rise urban areas”, Building and Environment Volume 56, October 2012, Pages 346–360.
 Chao Yuan, Edward Ng, Leslie K. Norford, “Improving air quality in high-density cities by understanding the relationship between air pollutant dispersion and urban morphologies. Building and Environment Volume 71, January 2014, Pages 245–258.
 Azli Abd Razak, Aya Hagishima, Naoki Ikegaya, Jun Tanimoto, “Analysis of airflow over building arrays for assessment of urban wind environment”, Building and Environment Volume 59, January 2013, Pages 56–65.
 Xiao, Bao-Yi, Building environment and ventilation, Department of Harbor and River engineering, National Taiwan Ocean University, 2010. (in Chinese).
 Lin TP, Matzarakis A, Huang JJ. (2006). Thermal comfort and passive design of bus shelters. In the 23rd Conference on Passive and Low Energy Architecture (PLEA2006), Geneva.