Assessment of the influence of daily shadings pattern on human thermal comfort and attendance in Rome during summer period

Letizia Martinelli, Tzu Ping Lin, Andreas Matzarakis

研究成果: Article同行評審

50 引文 斯高帕斯(Scopus)


Solar access has a critical influence on human thermal comfort. In shaded areas, direct shortwave radiation fluxes decrease and a cooling effect is produced. The percentage and position of shaded areas in an open space depend on sun position and urban morphology, so they change during the day, affecting attendance distribution over time. The study assessed the relationship between daily shading patterns, attendance and thermal comfort during summer at San Silvestro square in Rome, Italy. Field investigations were conducted on 1st and 2nd August 2014, including meteorological measurements and unobtrusive observations. The assessment of thermal comfort was based on the Physiologically Equivalent Temperature (PET), calculated using the RayMan model. The majority of visitors at San Silvestro square sought shaded locations when sitting, resulting in a variation of attendance throughout the day. The attendance in unshaded location passed from 0 to 2 people at 11:00 to 2-10 at 12:00, whereas the attendance in shaded locations had a minimum of 0-4 at 12:00 and a maximum of 52-94 at 18:00. This preference was strongly correlated with thermal comfort analysis, as PET values were significantly lower in shaded areas. The minimum difference in the median of PET from shaded and unshaded locations was 2°C at 18:00 and the maximum difference was 7°C at 11:00. The main findings of this study highlight the importance of considering daily shading pattern when renovating open spaces in Mediterranean climate and can be used as reference for future renovations.

頁(從 - 到)30-38
期刊Building and Environment
出版狀態Published - 2015 十月 1

All Science Journal Classification (ASJC) codes

  • 環境工程
  • 土木與結構工程
  • 地理、規劃與發展
  • 建築與營造


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