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Pedestrian Wind in High-Rise Residential Quarters

  • Feng YangEmail author
  • Liang Chen
Chapter
  • 113 Downloads
Part of the The Urban Book Series book series (UBS)

Abstract

Study intent Urban wind environment has significant impacts on pedestrian comfort and safety, as well as pollution dispersion and building energy consumption. This case study empirically examines the microscale effect of urban form, density and greenery on summertime and wintertime outdoor pedestrian-level wind environment and users’ thermal and wind comfort in selected high-rise residential neighborhoods in Shanghai. Based on the findings, proper design strategies are formulated for high-rise residential neighborhoods in the so-called hot-summer cold-winter (HSCW) climate zone in China, so as to optimize ventilation potential in hot-humid summer and transient seasons while protecting users from strong winds in cold season. Results and discussion In summer, the wind statistics indicates significant influence from urban geometry. The pedestrian-level wind velocity ratio (WVR) is significantly correlated with the “degree of enclosure” indicated by sky view factor (SVF), due to buildings and/or greenery. It suggests that within the practical range, increasing SVF by 10% could increase WVR by 7–8%. Under the observed weak wind environment, SVF could indicate the thermal buoyancy-driven airflow rate that is determined by solar radiation heating. At the site level, WVR is significantly negatively correlated with building volumetric density (floor area ratio, FAR). In the winter survey, the measured WVR is highest in the long-linear high-rise building layout, and is lowest in the mid-rise linear building layout; but the questionnaire survey reveals that there are still 87% of respondents felt fairly comfortable in the long-linear high-rise building layout, only 7% less than the mid-rise building layout. Overall, since winter wind is not harsh, summer ventilation should be prioritized in high-rise building design in Shanghai considering seasonal prevailing wind directions. Winter shelter, if needed, can be provided by proper landscape design.

References

  1. Blocken B, Carmeliet J (2004) Pedestrian wind environment around buildings: literature review and practical examples. J Therm Envelope Build Sci 28:107–159CrossRefGoogle Scholar
  2. Bottema M (1999) Towards rules of thumb for wind comfort and air quality. Atmos Environ 33:4009–4017CrossRefGoogle Scholar
  3. Georgakis C, Santamouris M (2008) On the estimation of wind speed in urban canyons for ventilation purposes—Part 1: coupling between the undisturbed wind speed and the canyon wind. Build Environ 43:1404–1410CrossRefGoogle Scholar
  4. Givoni B, Noguchi M, Saaroni H, Pochter O, Yaacov Y, Feller N, Becker S (2003) Outdoor comfort research issues. Energy Build 35:77–86CrossRefGoogle Scholar
  5. ISO 10551 (2001) Ergonomics of the thermal environment–assessment of the influence of the thermal environment using subjective judgement scales. International Organization for Standardization, GenevaGoogle Scholar
  6. Ng E (2008) Policies and technical guidelines for urban planning of high-density cities—air ventilation assessment (AVA) of Hong Kong. Build Environ 44:1478–1488CrossRefGoogle Scholar
  7. Oke T, Mills G, Christen A, Voogt J (2017) Urban climates, Cambridge University Press, CambridgeGoogle Scholar
  8. Oke TR (1987) The boundary layer climates, 2nd edn. Methuen, London and New YorkGoogle Scholar
  9. Steemers K, Steane MA (eds) (2004) Environmental diversity in architecture. Spon Press, New YorkGoogle Scholar
  10. Yang F, Lau SSY, Qian F (2010) Summertime heat island intensities in three high-rise housing quarters in inner-city Shanghai China: building layout, density and greenery. Build Environ 45:115–134CrossRefGoogle Scholar
  11. Yang F, Lau SSY, Qian F (2011) Urban design to lower summertime outdoor temperatures: an empirical study on high-rise housing in Shanghai. Build Environ 46:769–785CrossRefGoogle Scholar
  12. Yang F, Qian F, Lau SSY (2013) Urban form and density as indicators for summertime outdoor ventilation potential: a case study on high-rise housing in shanghai. Build Environ 70: 122–137.  https://doi.org/10.1016/j.buildenv.2013.08.019
  13. Yang F (2015) Investigating wintertime pedestrian wind environment and user perception in dense residential neighbourhood in a city of hot-summer cold-winter climate zone China. Indoor Built Environ 26 (3): 392–408.  https://doi.org/10.1177/1420326x15620257

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.College of Architecture and Urban PlanningTongji UniversityShanghaiChina
  2. 2.School of Geographic SciencesEast China Normal UniversityShanghaiChina

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