Comfort Evaluation in Urban Open Spaces Based on Wind Comfort Criteria,Case Study: Isfahan

Document Type : Original Articles


1 MSc. Student of Urban Design, Faculty of Architecture and Urbanism, Teacher Training Shahid Rajaee University, Tehran, Iran

2 Assistant Professor, Faculty of Architecture and Urbanism, Shahid Rajaee Teacher training University, Tehran, Iran


Wind is one of the climate parameters that architecture and environmental designer have paid attention to itfrom past time till now. In some cases, wind flow in the urban open space is useful and it help to the natural ventilation and it causes improve human comfort and reduce energy consumption. On other hands in some cases wind flow causes reduce human comfort in urban open spaces. So in each climate architectures and other designer can decide how wind flow should control in the urban open spaces according to the wind comfort. In this article we want according to the Isfahan climate dates and statistical calculations and compared with wind comfort criteria, find the mount of the wind comfort criteria in the urban open spaces in Isfahan. So in this study three criteria consist of “Wind Chill Factor”, “Beaufort Factor” and “Penwarden Factor” was used. The resultsof this study shown that wind flow just in the January cans reduce human comfort in open spaces and in the design of these spaces have to reduce the amount of the wind flow in this month. In other hand, in the June, July, August months, if the wind flow increase till 6m/s, the human comfort can improve. Wind flow in other month of year has favorable position and it can make human comfort so it is better that the wind speed keeps in the open space and street in this months.


  1. Erell E, Pearlmutter D, Williamson T. Urban microclimate. Designing the Spaces between Buildings. London: Earthscan; 2011. p. 25
  2. Gehl J. Life between Buildings, Using Public Space. Washington D.C: Island- press; 2011. p. 58
  3. Unger J. Comparisons of urban and rural bioclimatic conditions in the case of a central-European city. International Journal of Biometeorology; 1999; 43(16):139–144.
  4. Thorsson S, Lindqvist M, Lindqvist S. Thermal bioclimatic conditions and patterns of behavior in an urban park in Goteborg, Sweden. International Journal of Biometeorology; 2003; 48(4):149–156.
  5. Emmanuel R, Rosenlund H, Johansson E. Urban shading–a design option for the tropics? A study in Colombo, Sri Lanka. International Journal of Climatology; 2006; 27(2):1995–2004.
  6. Andrade H, Alcoforado M J, Oliveira S. Perception of temperature and wind by users of public outdoor spaces: relationship with weather parameters and personal characteristics. International Journal of Biometeorology; 2011; 55(3):665–680.
  7. Egerh_zi L, K_antor N, Guly as A. Investigation of human thermal comfort by observation the utilization of open-air terraces in catering places, a case study in Szeged. Act Climatologicaet Chorological Universitatis Szegediensis; 2009; 42)43(:29–37.
  8. Alcoforado M J, Andrade H, Lopes A, Vasconcelos J. Application of climatic guidelines to urban planning. The example of Lisbon (Portugal). Land Urban Plan; 2009; 90(7): 56–65.
  9. Knez I, Thorsson S. Thermal, emotional and perceptual evaluations of a park: cross-cultural and environmental attitude comparisons. Building and Environment; 2008; 43(21):1483–1490.
  10. G _ al T, Unger J. Detection of ventilation paths using high- resolution roughness parameter mapping in a large urban area. Building and Environment; 2006; 41(5):198–206.
  11. Blocken B, Carmeliet J. Pedestrian wind conditions at outdoor platforms in a high-rise apartment building: generic sub-configuration validation, wind comfort assessment and uncertainty issues. Wind and Structures; 2008; 11(1): 51–70.
  12. Andrade H, Alcoforado M J. Microclimatic variation of thermal comfort in a district of Lisbon (Telheiras) at night. Theoretical and Applied Climatology; 2008; 92(3–4): 225–237.
  13. Isaac Guedi Capeluto. A methodology for the qualitative analysis of winds: natural ventilation as a strategy for improving the thermal comfort in open spaces. Building and Environment; 2005; 40(2):175–181
  14. Razjouyan M. Wind and Comfort, Design With Climate. Tehran, Iran, Shahid Beheshti University publishing; 2007. P.15. [In Persian]
  15. Sheykhbeygloo R, Mohammadi J. Analyze the elements of wind and rain, with an emphasis on urban design case study: Isfahan. Environment planning and geography journal; 2010; 39(2):3-15 [In Persian]
  16. Tavousi T. climate and new school architecture in Isfahan. Geography and development journal; 2008; 11(5):12-26 [In Persian]
  17. Penwarden A D. Acceptable In Speeds in Towns Build. Garston, Building Research Establishment: Dept. of the Environment; 1973. p. 259.