ISIL ENERJİ DEPOLAMA SİSTEMLERİ İÇİN ORGANİK FAZ DEĞİŞTİREN MADDELERİN MEVCUT DURUMU ÜZERİNE BİR İNCELEME

Yıl 2018, Cilt: 6 Sayı: 1, 161 - 174, 30.03.2018

Mehmet Selçuk Mert , Merve Sert , Hatice Hande Mert

https://doi.org/10.21923/jesd.331998

Cited By: 10

Öz

Gizli
ısıl enerji depolama son yıllarda önemle üzerinde durulan, enerji verimliliğini
artırıcı yöntemlerden biridir. Gizli ısıl enerji depolamada kullanılan yüksek
ısıl kapasiteye sahip ve belirli bir sıcaklık değerinde faz değiştirerek enerji
absorblayan veya salan maddelere Faz
Değiştiren Maddeler (FDMler) adı verilir. FDMler organik, inorganik ve ötektik
bileşikler olmak üzere üç ana grupta toplanır. Organik FDMler katı-sıvı faz
değişimi gösterirken küçük hacim değişimine uğramaları ve yüksek gizli ısıl
enerji depolama kapasitesine sahip olmalarından dolayı diğer FDMlere göre daha
çok tercih edilmektedir. Kapsülleme çalışmaları organik FDMlerin ısı transfer
alanını artırmak ve faz değişimi sırasındaki hacim değişimini kontrol altında
tutmak amaçlı yapılmaktadır. Ayrıca organik FDMlere nano yapıda malzemelerin
ilave edilmesi ısıl iletkenliğin artırılmasını sağlamaktadır. Bununla birlikte,
ısıl davranışların incelenmesi için yapılan modelleme çalışmaları ile organik
FDMlerin kullanımı giderek yaygınlaşmaktadır. Bu çalışmada, son 20 yılda
organik FDMlerin kapsüllenmesi, ısıl iletkenliğinin artırılması ve ısıl
davranışının modellenmesi konusunda yapılan araştırmaların sonuçları
sunulmuştur.    

Anahtar Kelimeler

Enerji, Isıl Enerji Depolama, Faz Değiştiren Madde, Isı Transferi, Kapsülleme

A REVIEW ON CURRENT STATUS OF ORGANIC PHASE CHANGE MATERIALS FOR THERMAL ENERGY STORAGE SYSTEMS

Öz

Latent heat energy storage is one of the energy
efficiency enhancing methods that has been emphasized in recent years.
Materials used for latent heat storage having high storage capacity and
absorbing and emitting heat by changing phase at a certain temperature are called
phase change materials (PCMs). PCMs classify in three main groups: organic,
inorganic, and eutectic. Organic phase change materials are mostly preferred
than the other phase change materials due to the fact that they possess small-volume
changes during the solid-liquid phase change process and higher latent heat of
fusion. Encapsulation studies are carried out to increase the heat-transfer
area for organic PCMs and to preserve volume change during phase change.
Furthermore, the addition of the nano-structured materials into the organic
phase change materials provides that the thermal conductivity be increased. At
the same time, the use of organic phase change materials is becoming
increasingly widespread with modeling studies on the thermal behavior analysis.

In this study, a review of
researches on encapsulation of organic phase change materials, thermal
conductivity enhancement and modeling of thermal behavior reported in the last
20 years has presented.    

Anahtar Kelimeler

Energy, Thermal Energy Storage, Phase Change Material, Heat Transfer, Encapsulation

Kaynakça

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