Journal
SOLAR ENERGY
Volume 127, Issue -, Pages 48-55Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2016.01.011
Keywords
Form-stable phase change materials; Thermal conductivity; Leakage rate; Synergistic enhancement
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Funding
- Nippon Steel Arts Foundation of China [U1530102]
- Important Cultivation Project of Education Department of Sichuan Province [14CZ0011]
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory [15kffk08]
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Thermally conductive form-stable phase change materials (FSPCMs) were prepared by using ethylene-vinyl acetate (EVA), paraffin, expanded graphite (EG) and carbon fiber (CF) as row materials. Two-dimensional EG and one-dimensional CF were used as thermally conductive fillers. Paraffin and EVA were phase change material (PCM) and supporting material, respectively. Differential scanning calorimetry (DSC) and leakage rate testing results indicated that FSPCMs owned the melting temperature of 45.63 degrees C and the latent heat of 167.4 J/g. The prepared material had a small leakage rate which was less than 2%. Scanning electron microscope (SEM) results shown that EG and CF possessed excellent compatibility in FSPCMs. In-situ X-ray diffraction (XRD) tests demonstrated that the crystal behaviors of paraffin and EVA were changed with the phase transformation. Thermal conductivity results shown that thermal conductivity of FSPCMs in horizontal orientation was higher than that in longitudinal orientation. EG and CF have synergistic enhancement to thermal conductivity of FSPCMs. (C) 2016 Elsevier Ltd. All rights reserved.
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