The Effect of Urban Design on Outdoor Thermal Environment in a Central Business District Area in Singapore

Wei Yang; Yao Lin Lin; Nyuk Hien Wong

doi:10.4028/www.scientific.net/AMR.1073-1076.1428

Paper Titles

Distribution Feature of Soil Particles and Land Use Pattern on Platform Garden in South Fujian
p.1407

Dynamic Correlation Effects between Marine Economic Development and the Comprehensive Competitiveness of the Coastal Zone
p.1411

Evaluating Cultural Routes for a Network of Competitive Cities in the Mediterranean Sea: The Eastern Monasticism in Western Mediterranean Area
p.1418

Study on Ecological Environment Problems in Green Urbanization of Jilin Province
p.1423

The Effect of Urban Design on Outdoor Thermal Environment in a Central Business District Area in Singapore
p.1428

The Structure of Inbound Tourist Markets Based on the Shift-Share Analysis - A Case Study of Guangdong Province, China
p.1433

Transformation of Housing and Communal Services of Modern Russia
p.1438

Analysis on Characteristics of Saline Soil in Yanqing New Town
p.1442

A Regional Analysis on Chinese Urban-Rurual Residents’ Income Disparity - Based on DEA and Multi-Regression Methods
p.1447

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1073-1076The Effect of Urban Design on Outdoor Thermal...

The Effect of Urban Design on Outdoor Thermal Environment in a Central Business District Area in Singapore

Abstract:

Outdoor thermal environment in urban spaces is important for people to enjoy the urban environment. This paper investigated the effect of urban design on outdoor thermal environment in an urban street in the central business district in Singapore, focusing on street orientation and height-to-width ratio. The microclimatic parameters of different street design scenarios were determined by ENVI-met numerical simulation. Field measurement was conducted to validate the results from the numerical simulation and they were in good agreement. For different design scenarios, it is found that (1) The air temperature differences did not exceed 0.8°C; (2) The mean radiant temperature differences could exceed 40°C; (3) The maximum wind speed difference was 0.6 m/s; (4) No distinct relative humidity differences could be found. The results show that shading is the key strategy for improving outdoor thermal environment in Singapore because it leads to reduction on the air temperature and mean radiant temperature simultaneously. N-S orientated street had the best thermal environment condition.Outdoor thermal environment in urban spaces is important for people to enjoy the urban environment. This paper investigated the effect of urban design on outdoor thermal environment in an urban street in the central business district in Singapore, focusing on street orientation and height-to-width ratio. The microclimatic parameters of different street design scenarios were determined by ENVI-met numerical simulation. Field measurement was conducted to validate the results from the numerical simulation and they were in good agreement. For different design scenarios, it is found that (1) The air temperature differences did not exceed 0.8°C; (2) The mean radiant temperature differences could exceed 40°C; (3) The maximum wind speed difference was 0.6 m/s; (4) No distinct relative humidity differences could be found. The results show that shading is the key strategy for improving outdoor thermal environment in Singapore because it leads to reduction on the air temperature and mean radiant temperature simultaneously. N-S orientated street had the best thermal environment condition. Shading achieved by means of high aspect ratios can improve thermal environment at street level.

You might also be interested in these eBooks

Environmental Protection and Resource Utilization IV

View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 1073-1076)

Pages:

1428-1432

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.1428

Citation:

Cite this paper

Online since:

December 2014

Authors:

Wei Yang*, Yao Lin Lin, Nyuk Hien Wong

Keywords:

Numerical Simulation, Outdoor Thermal Environment, Shading, Urban Design

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] Ali-Toudert, F., and Mayer, H. (2006). Numerical study on the effects of aspect ratio and orientation of an urban street canyon on outdoor thermal comfort in hot and dry climate. Building and Environment, 41: 94-108.

DOI: 10.1016/j.buildenv.2005.01.013

Google Scholar

[2] Johansson, E. and Emmanuel, R. (2006). The influence of urban design on outdoor thermal comfort in the hot, humid city of Colombo, Sri Lanka. International Journal of Biometeorology, 51: 119-133.

DOI: 10.1007/s00484-006-0047-6

Google Scholar

[3] Ali-Toudert, F. and Mayer, H. (2007). Effects of asymmetry, galleries, overhanging facades and vegetation on thermal comfort in urban street canyons. Solar Energy, 81(6): 742-754.

DOI: 10.1016/j.solener.2006.10.007

Google Scholar

[4] Emmanuel, R., Rosenlund, H. and Johansson, E. (2007). Urban shading–a design option for the tropics? A study in Colombo, Sri Lanka. International Journal of Climatology, 27: 1995-(2004).

DOI: 10.1002/joc.1609

Google Scholar

[5] Kakon, A.N., Mishima, N. and Kojima, S. (2009). Simulation of the urban thermal comfort in a high density tropical city: Analysis of the proposed urban construction rules for Dhaka, Bangladesh. Building Simulation, 2: 291-305.

DOI: 10.1007/s12273-009-9321-y

Google Scholar

[6] Herrmann, J. and Matzarakis, A. (2012). Mean radiant temperature in idealized urban canyons- Examples from Freiburg, Germany. International Journal of Biometeorology, 56: 199-203.

DOI: 10.1007/s00484-010-0394-1

Google Scholar

[7] Yang, W. and Wong, N.H. (2013). Field study of human thermal perception in urban parks in Singapore. International Journal of Sustainable Building Technology and Urban Development, 4, 125-133.

DOI: 10.1080/2093761x.2013.768184

Google Scholar

[8] Yang, W., Wong, N.H. and Jusuf, S.K. (2013). Thermal comfort in outdoor urban spaces in Singapore. Building and Environment, 59: 426-435.

DOI: 10.1016/j.buildenv.2012.09.008

Google Scholar

[9] Ali-Toudert, F. (2005). Dependence of outdoor thermal comfort on street design in hot and dry climate. PhD Dissertation, Freiburg University, Freiburg.

Google Scholar

[10] Bruse, M. (1999). The influences of l˚Cal environmental design on micr˚Climate. PhD Dissertation, University of B˚Chum, B˚Chum, Germany.

Google Scholar

[11] Wong, N.H., Jusuf, S.K., Win, A.A.L., Thu, H.K., Negara, T.S. and Wu, X. (2007). Environmental study of the impact of greenery in an institutional campus in the tropics. Building and Environment, 42: 2949-2970.

DOI: 10.1016/j.buildenv.2006.06.004

Google Scholar

[12] Ng, E., Chen, L., Wang, Y. and Yuan, C. (2012). A study on the cooling effects of greening in a high-density city: An experience from Hong Kong. Building and Environment, 47: 256-271.

DOI: 10.1016/j.buildenv.2011.07.014

Google Scholar