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

Year 2020, , 504 - 517, 30.01.2020

Ümit Nazlı Temel

https://doi.org/10.28948/ngumuh.605135

Abstract

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 42^oC,
 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.

Keywords

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

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