BioPCM entegreli bina bileşenlerinin günlük ısıtma soğutma oranlarına ve lokal ısıl hissiyatlar üzerindeki etkisi

Öz

Faz değiştiren malzemeler (FDM) sıcaklık salınımlarını ve ısıtma, soğutma yüklerini azaltırken ısıl konfor koşullarını iyileştirirler. Ancak, bu malzemelerin tüm bina yüzeylerine uygulamasından ziyade, dış mikroiklisel koşullarına daha az maruz kalmalarına neden olacak şekilde, farklı yapı bileşenlerine tekil olarak uygulanması, pik ve geçiş dönemlerinde enerji tüketimi ve lokal ısıl konforsuzluğu arttırabilir. Bu çalışma, her senaryo için eşit miktarda olmak üzere, farklı yapı bileşenlerine uygulanan Fdm malzemesinin bulunduğu yer itibariyle güneş ışınımına maruz kalma durumu göz önüne alınarak, ısıtma soğutma oranlarına ve gün içinde beş zaman aralığında, lokal ısıl konfor seviyelerine etkileri (PMV), tahmin edilen ortalama oy dağılım haritaları ve 9 noktadaki lokal psikolojik stres puanları ile incelenmiştir. Sonuçlara göre %25 maksimum azaltım sağlayan faz değiştiren malzemeli çatı uygulaması dahil, tüm faz değiştiren malzemeli senaryolar soğutma miktarlarını azaltmıştır. Sadece FDM entegreli doğu ve batı duvarları, ve çatı uygulamaları, ısıl hissiyatta çok küçük iyileştirmeyle, ısıtmada gözle görülür azaltım sağlamıştır. FDM nin doğu duvarında uygulandığı senaryo ile en yüksek lokal psikolojik stres puanları elde edilmiştir. Malzemenin güney cephesine uygulandığı senaryoda kullanıcı ısıl stres değerlerinin minimum seviyelere inmesi, ancak belirgin farklar gözlenmemesi yapı kabuğunda bütüncül olarak FDM entegre edilmesinden ziyade, tüm senaryolarda eşit miktarda, ancak yetersiz yüzey alanına BioPCM uygulanmasına dayanmaktadır.

Anahtar Kelimeler

• BioPCM
• Isıl konfor
• ısıtma-soğutma oranı
• Lokal psikolojik stres
• Geçiş dönemi

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

Öz

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.

Anahtar Kelimeler

• BioPCM
• Thermal comfort
• Heating-cooling rate
• Local physiological stress

Kaynakça

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