کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6535091 49296 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Shape-stabilized phase change composite by impregnation of octadecane into mesoporous SiO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Shape-stabilized phase change composite by impregnation of octadecane into mesoporous SiO2
چکیده انگلیسی
We developed shape-stabilized phase change composites (PCCs) for building materials with high heat-storage density by vacuum impregnation of the phase change material (PCM) octadecane into mesoporous SiO2. We examined the effects of the average pore size of mesoporous SiO2 on the melting point and latent heat of the PCCs. Cyclic tests of melting and freezing were performed to evaluate leakage and degradation of the PCCs. The thermophysical properties of the PCCs were measured by differential scanning calorimetry, and the following results were obtained: (1) The impregnation ratio of the composites was above 0.95; therefore, almost all pores were completely filled with PCM. (2) The melting point of the PCMs decreased with decreasing average pore diameter, and the melting point was established as a function of average pore diameter from the Gibbs-Thomson equation, taking into account the existence of a nonfreezing layer on the surface of the pore wall. (3) The octadecane/mesoporous SiO2 composites retained the full amount of impregnated PCM, even after cyclic heating and cooling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 143, December 2015, Pages 424-429
نویسندگان
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