김재경  나이선  허다솜  정승권

Vol. 40,  No. 2, pp. 55-64, Apr.  2025
10.14341/JKOSOS.2025.40.2.55

universal thermal climate index(UTCI) Computational fluid dynamics (CFD) Thermal comfort Climate Change coldest zone

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Amid a general increase in global temperature due to climate change, cold waves have been occurring with greater frequency, designating the evaluation of urban thermal comfort and the development of response strategies as critical research priorities. In this context, the present study employs Jeonju Hanok Village as a case study to quantitatively analyze thermal health indicators under cold-wave conditions. By applying the Urban Thermal Comfort Index (UTCI) and Computational Fluid Dynamics (CFD), we conducted a thermal comfort analysis to identify areas most vulnerable to cold stress. This study yielded three key findings. First, when meteorological data from 6:00 AM on December 21, 2023, to 12:00 PM on December 22, 2023, were input into the CFD simulation, the simulated average temperature was slightly higher than the actual recorded temperature, whereas the actual relative humidity was higher than the simulated value. Second, UTCI-based analysis revealed that the coldest period occurred at 3:00 AM on December 22, 2023. During this period, zones where the UTCI fell below 13°C were defined as the “Coldest Zone”, and three such zones were identified within Jeonju Hanok Village. Third, two of these zones were located behind tall buildings, contributing to their cold-stress susceptibility due to wind blockage or air stagnation. Meanwhile, the third zone was situated in a green area, where the topographical features result in lower heat-storage capacity and higher relative humidity, thereby further reducing the UTCI. These findings underscore the importance of developing climate change adaptation policies tailored to local environmental characteristics. Moreover, cold-wave-focused thermal comfort analysis can provide fundamental data for future policy proposals and design strategies aimed at mitigating the impacts of extreme cold.