کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4918925 1428938 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and thermal properties of octyl, decyl, dodecyl and tetradecyl stearates as phase change materials for thermal energy storage
ترجمه فارسی عنوان
خواص آماده سازی و حرارتی اکتیل، دسیل، دودکش و تترادیدیل استارات به عنوان مواد تغییر فاز برای ذخیره انرژی حرارتی
کلمات کلیدی
آلکیل استایرات، تغییر فاز حالت جامد، دمای ذوب، گرمای خنثی فیوژن، پایداری حرارتی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
A homologous series of n-alkyl stearates CnS (C17H35COO(CH2)n-1CH3, n = 8, 10, 12, 14) was synthesized as solid-liquid phase change materials (PCMs) by esterification of stearic acid with 1-octanol, 1-decanol, 1-dodecanol and 1-tetradecanol. Molecular structures of CnS were confirmed by fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance (1H NMR) spectra. Differential scanning calorimetry (DSC) measurements revealed that the melting temperatures of CnS were in the range of 21.4 ∼ 44.4 °C and increased with the increase in alkyl chain length. The latent heats of fusion were in the range of 165.8 ∼ 191.1 kJ kg−1. The comparable solidifying temperatures and latent heats of solidification were also observed. The phase change temperatures and latent heats changed little after repeated melting/solidifying cycles. Thermogravimetric analysis suggested that CnS was thermally stable at temperatures up to 215 °C. The volumetric latent heat storage capacities of CnS ranged from 146 to 159 MJ m−3. The latent heat storage/release performance of CnS in a ceramic cell suggested the potential application of the n-alkyl stearates for passive thermal energy storage to reduce the indoor temperature fluctuation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy and Buildings - Volume 152, 1 October 2017, Pages 442-447
نویسندگان
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