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Preparation and thermal energy storage properties of paraffin/expanded graphite composite phase change material

机译:石蜡/膨胀石墨复合相变材料的制备及储热性能

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摘要

The paraffin/expanded graphite (EC) composite phase change material (PCM) was prepared by absorbing liquid paraffin into EG, in which paraffin was chosen as the PCM. EG was produced by microwave irradiation performed at room temperature. It was found that the EG prepared at 800 W irradiation power for 10 s exhibited the maximum sorption capacity of 92 wt% for paraffin. Scanning electron microscopy images showed that paraffin was uniformly dispersed in the pores of EG. Differential scanning calorimeter analysis indicated that the melting temperature of the composite PCM was close to that of paraffin, and its latent heat was equivalent to the calculated value based on the mass fraction of paraffin in the composite. X-ray diffraction analysis showed that the composite PCM was just a combination of paraffin with EG, and no new substance was produced. Thermal energy storage performance of the composite PCM was tested in a latent thermal energy storage (LTES) system. Transients of axial and radial temperature profiles were obtained in the LTES for the composite PCM and paraffin. The thermal energy storage charging duration for the composite PCM was reduced obviously compared to paraffin.
机译:通过将液态石蜡吸收到EG中来制备石蜡/膨胀石墨(EC)复合相变材料(PCM),其中选择石蜡作为PCM。 EG是通过在室温下进行微波照射而产生的。发现以800W的照射功率制备的EG表现出对石蜡的最大吸附容量为92wt%。扫描电子显微镜图像显示,石蜡均匀地分散在EG的孔中。差示扫描量热仪分析表明,复合PCM的熔融温度接近石蜡,其潜热等于基于复合物中石蜡质量分数的计算值。 X射线衍射分析表明,复合PCM只是石蜡与EG的组合,没有产生新物质。在潜在的热能存储(LTES)系统中测试了复合PCM的热能存储性能。在LTES中获得了复合PCM和石蜡的轴向和径向温度曲线的瞬态。与石蜡相比,复合PCM的热能存储充电时间明显缩短。

著录项

  • 来源
    《Applied Energy》 |2012年第1期|p.426-431|共6页
  • 作者单位

    The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;

    The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;

    The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;

    The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;

    The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;

    The Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    paraffin; expanded graphite; microwave irradiation; thermal energy storage;

    机译:石蜡;膨胀石墨微波辐射热能储存;

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