Microencapsulated n -alkane eutectics in polystyrene for solar thermal applications     
Yazarlar (5)
Doç. Dr. Derya KAHRAMAN DÖĞÜŞCÜ Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Çınar Kızıl
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Doç. Dr. Alper BİÇER Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Ahmet Sarı
Karadeniz Teknik Üniversitesi, Türkiye
Prof. Dr. Cemil ALKAN Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Solar Energy
Dergi ISSN 0038-092X Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q4
Makale Dili İngilizce
Basım Tarihi 01-2018
Cilt No 160
Sayı 1
Sayfalar 32 / 42
DOI Numarası 10.1016/j.solener.2017.11.072
Makale Linki https://linkinghub.elsevier.com/retrieve/pii/S0038092X17310654
Özet
Some n-alkanes (n-tetracosane: C24, n-eicosane: C20, n-nonadecane: C19, n-octadecane: C18, and n-heptadecane: C17) and their eutectic mixture have been encapsulated in polystyrene (PS) as phase change materials (PCMs) in order to benefit from solar energy. The eutectic melting points and combination ratios of C17-C18, C20-C17, C20-C19, and C20-C24 eutectic mixtures (EMs) were found out theoretically and proven experimentally before the encapsulation processes. Microencapsulated eutectic mixtures (MEEMs) were structurally proven using a Fourier Transform Infrared (FTIR) Spectroscopy Analysis and morphologically investigated using a Scanning Electron Microscopy (SEM), a Polarized Optical Microscopy (POM), and a Particle Size Distribution (PSD) analyzer. Differential Scanning Calorimetry (DSC) analysis was primarily considered for characterization. MEEMs had reversible and mostly isothermal phase change temperatures between 21.0 and 35.9 °C and enthalpy between 61.2 and 146.1 J/g. These values were intentially suitable for solar thermal applications. Thermogravimetry Analysis (TGA) was performed to reveal thermal stability limits of the MEEMs. Accelarated thermal cycling experiments were performed to investigate stability of MEEMs.
Anahtar Kelimeler
Energy storage | Eutectic paraffins mixture | Microencapsulation