TERMAL OLARAK İYİLEŞTİRİLMİŞ FARKLI ERİME SICAKLIKLARINA SAHİP FAZ DEĞİŞKEN MALZEMELERİN ISIL CEVAPLARININ ARAŞTIRILMASI

Bu çalışmada, farklı erime sıcaklıklarına sahip parafin esaslı faz değişken malzeme (FDM) içerisine katkılanan aynı tip Grafen nanoparçacıkların (GNP) termal özellikler üzerindeki etkileri incelenmiştir. Bu kapsamda öncelikle 42oC, 62 oC ve 82 oC erime sıcaklığına sahip FDM’ler içerisine kütlece %1, %3 ve %5 GNP katkılanarak elde edilen GNP/FDM kompozitleri termal olarak karakterize edilmiştir. Termal karakterizasyon; ısıl iletkenlik, erime/katılaşma sıcaklıkları ve enerji depolama kapasiteleri gibi özellikler ölçülerek gerçekleştirilmiştir. Termal özellikleri belirlenen GNP/FDM kompozitlerinin bir enerji depolama birimindeki termal cevapları ve görselleştirmesi de ayrıca araştırılmıştır. Elde edilen sonuçlar GNP kütle bölüntülerinin tüm FDM’lerde yaklaşık olarak aynı büyüklükte ısıl iletkenlik artışına, fakat farklı yüzdelik iyileştirmeye neden olduğunu göstermiştir. Buna karşın GNP katkısının erime/katılaşma enerji kapasitelerinde %13’e varan azalmaya neden olduğu belirlenmiştir.

Anahtar Kelimeler:

Faz değişken malzeme, , erime sıcaklığı, , grafen nanoparçacık, , ısıl iletkenlik

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