Synthesis and thermal energy storage properties of xylitol pentastearate and xylitol pentapalmitate as novel solid liquid PCMs     
Yazarlar (2)
Doç. Dr. Alper BİÇER Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Ahmet Sar
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Solar Energy Materials and Solar Cells
Dergi ISSN 0927-0248 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI
Dergi Grubu Q4
Makale Dili İngilizce
Basım Tarihi 07-2012
Cilt No 102
Sayı 1
Sayfalar 125 / 130
DOI Numarası 10.1016/j.solmat.2012.03.014
Özet
In this study, xylitol pentastearate and xylitol pentapalmitate were synthesized as novel solid-liquid PCMs by an esterification reaction in order to eliminate the unfavorable thermal properties of xylitol (such as high melting point) and stearic and palmitic acids (such as high melting point, low corrosivity, bad odor, and sublimating property). The synthesized ester compounds were characterized chemically by using Fourier transform infrared (FT-IR) and proton nuclear magnetic resonance ( 1H NMR) spectroscopy methods. By using the differential scanning calorimetry (DSC) method, the melting temperatures of xylitol pentastearate and xylitol pentapalmitate were measured as 32.35 °C and 18.75 °C, respectively, while their latent heats of melting were determined as 205.65 J g -1 and 170.05 J g -1 respectively. These results indicate that the synthesized PCMs have high latent heat values and suitable phase change temperatures for thermal energy storage applications. The thermal cycling test shows that the synthesized PCMs have good thermal reliability after 1000 thermal cycles. Thermogravimetric (TG) analysis results also reveal that the PCMs have good thermal stability over their working temperatures. © 2012 Elsevier B.V. All rights reserved.
Anahtar Kelimeler
Energy storage | Palmitic acid | PCM | Stearic acid | Thermal properties | Xylitol