期刊
APPLIED THERMAL ENGINEERING
卷 118, 期 -, 页码 703-713出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2017.02.057
关键词
Phase change material; Gypsum-based composite; Thermal energy storage
资金
- 973 Program [2015CB655102]
- National Natural Science Foundation of China [51408597]
- China Postdoctoral Science Foundation [2015T80602, 2014M551697]
- Jiangsu Postdoctoral Science Foundation [1501057A]
- State Key Laboratory of High Performance Civil Engineering Materials [2014CEM005]
- Jiangsu Key Laboratory for Construction Materials [CM2015-03]
The thermal energy storage of gypsum-based material was developed by incorporating diatomite/paraffin composite phase change materials. A diatomite/paraffin composite was first fabricated using mix proportions (paraffin:diatomite) of 0.6:0.4, 0.55:0.45, 0.5:0.5, and 0.45:0.55. The diatomite/paraffin composite was then incorporated in a gypsum based composite at 10%, 20%, and 30% of the gypsum weight. The scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR) and X-ray fluorescence spectrometer (XRF) results show that paraffin can be effectively impregnated into diatomite pores and has good compatibility. The differential scanning calorimetry (DSC) results reveal that the diatomite/paraffin composite has phase transition and latent heat temperatures of 70 degrees C. High thermal stability is observed for this fabricated diatomite/paraffin composite according to the thermo-gravimetric analysis (TG) method. The laser particle-sizer, X-ray diffractometer and laser Raman spectrograph results also show that the gypsum-based composite can be effectively stabilized. The strong thermal energy storage performance of the gypsum-based composite is clearly suggested by the results of the specific thermal performance test. (C) 2017 Elsevier Ltd. All rights reserved.
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