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Thermal Properties and Reliability of a Lauric Acid/Nonanoic Acid Binary Mixture as a Phase‐Change Material for Thermal Energy Storage
Author(s) -
Wang Zhao,
Sun Jinhe,
Xie Shaolei,
Ma Guixiang,
Jia Yongzhong
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700349
Subject(s) - thermogravimetric analysis , lauric acid , phase change material , materials science , thermal stability , thermal conductivity , thermodynamics , temperature cycling , thermal energy storage , supercooling , thermal , chemical engineering , chemistry , organic chemistry , composite material , fatty acid , physics , engineering
The thermal properties of a binary system composed of lauric acid (LA) and nonanoic acid (NA) and its binary phase diagram were studied. To put this binary system into practice, the mixture containing 96 wt % of LA was selected, which has a phase‐change temperature of 41 °C and a latent heat of 163 J g −1 , which is suitable for a domestic water heating application. Additionally, its thermal and chemical structure stability, thermal conductivity, degree of supercooling, and thermal reliability were investigated by using thermogravimetric analysis, FTIR spectroscopy, thermal conductivity analysis, the T ‐history method, and an accelerated thermal cycle test for 1000 melt/freeze cycles, respectively. The results of these tests indicated that the mixture has a remarkable thermal stability, a good chemical structure stability, no supercooling, and an excellent thermal reliability. Therefore, the mixture can be a potential phase‐change material for thermal energy storage.