Effect of Planting System of Iranian Garden on Thermal Comfort of Open Spaces; Case Study: Jahan Nama Shiraz Garden

Thermal comfort is one of the main factors for the participation of people in open urban spaces. This article focuses on the planting system in Jahan Nama Garden in Shiraz. The paper seeks to achieve the goal of reaching thermal comfort, increasing the people participation and optimization the outdoor thermal comfort in Jahan Nama garden.

The research method is descriptive-analytical and in terms of qualitative methodology. It used quantitative measurement in which the Jahan Nama garden has been simulated with ENVI-met 4. By selecting eight points in Jahan Nama Garden of Shiraz, climatic variables have been analyzed at 9, 12 and 17 ochr(chr(chr('39')39chr('39'))39chr(chr('39')39chr('39')))clock on the 1st of July as the hottest day of the year. By comparing these points with the thermal comfort index PET they are analyzed.

Checking the plant simulation models (trees type and canopy and their number) in their place have improved the open space thermal comfort conditions, and by passing through the garden space, the environmental conditions return to the previous state and the average rate of radiant temperature has the greatest effect on thermal comfort, which will be presented in form of bar and line diagrams.

In planting system, increasing the number of trees has a greater effect on the thermal comfort in garden space. It is to boost the participation rate and the reduction of thermal stress in the hot seasons. The height and the form trees have direct effect on the thermal comfort.