The present study examines the effect of different mitigation strategies on the microclimate and thermal sensation in an urban open area in Athens. The microclimatic model ENVI-met was applied to simulate thermal conditions for a warm summer day (15.07.2010). Thermal conditions were assessed based on air temperature and the Mediterranean thermal sensation scales of the Physiologically Equivalent Temperature (PET) and the Universal Thermal Climate Index (UTCI). The spatial and temporal resolution of PET throughout the square was developed per design scenario and was compared to the Current design layout to analyse and quantify the effectiveness of the mitigation strategies on the amelioration of thermal conditions. Results showed that the combination of the design scenarios was found to be the most advantageous mitigation strategy. The average PET and UTCI reduction of 6.9 °C and 6.1 °C, respectively, achieved a 15.5% improvement in thermal comfort.

The aim of this research was to set specific targets on thermal sensation improvement and, based on the obtained results, it suggests certain mitigation strategies that will allow the specification of the appropriate microclimatic interventions to improve thermal comfort to the desired extent in the context of developing urban design guidelines.

本研究探讨了不同缓解策略对雅典城市开放区域小气候和热感觉的影响。小气候模型 ENVI-met 用于模拟温暖夏日 (15.07.2010) 的热条件。根据气温和生理等效温度 (PET) 的地中海热感觉量表和通用热气候指数 (UTCI) 评估热条件。整个广场的 PET 空间和时间分辨率是根据设计方案开发的，并与当前设计布局进行比较，以分析和量化缓解策略对改善热条件的有效性。结果表明，设计方案的组合被认为是最有利的缓解策略。

本研究的目的是设定改善热感觉的具体目标，并根据获得的结果提出某些缓解策略，这些策略将允许指定适当的小气候干预措施，以在发展的背景下将热舒适度提高到所需的程度。城市设计指南。