Effect of BioPCM-Integrated Building Components on Diurnal Heating-Cooling Rates and Local Thermal Sensations

Authors : Neslihan Türkmenoğlu Bayraktar, Merve Kılınç Gilisıralıoğlu

Pages : 296-316

Doi:10.47480/isibted.1668591

View : 103 | Download : 189

Publication Date : 2025-10-30

Article Type : Research Paper

Abstract :Phase change materials (PCMs) reduce temperature fluctuations and heating-cooling loads while improving thermal comfort in buildings. However, instead of applying it to the total building envelope, using it on different building components individually with lesser exposure to the outer microclimate may increase energy consumption and local thermal discomfort during peak and transition periods. This study investigates the effect of bioPCM-integrated building components with an equal Pcm applied surface area for each scenario, considering their exposure to solar radiation with their location, on diurnal heating-cooling rates and local thermal comfort, by predicted mean vote (PMV) maps and local physiological stress grades at nine locations over five diurnal time intervals. The focus is on the hottest and transition periods under humid-temperate climate conditions. According to the results, all scenarios mitigated cooling rates, with a maximum reduction of 25% achieved by the PCM-applied roof scenario. Only bioPCM-integrated east-west walls and the roof notably reduced heating, with modest enhancements to thermal sensation. The highest local physiological stress grades occurred with East-wall BioPCM. The south wall BioPCM scenario minimized thermal stress without evident differences in thermal stress sensations among the occupants primarily due to equal but insufficient BioPCM-applied surface area compared to the overall application.
Keywords : BioPCM, Isıl konfor, ısıtma-soğutma oranı, Lokal psikolojik stres, Geçiş dönemi

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