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Evaluation and comparison of erythritol-based composites with addition of expanded graphite and carbon nanotubes

Author

Listed:
  • Guo, Shaopeng
  • Liu, Qibin
  • Zhao, Jun
  • Jin, Guang
  • Wang, Xiaotong
  • Lang, Zhongmin
  • He, Wenxiu
  • Gong, Zhijun

Abstract

To seek an appropriate additive for the preparation of erythritol-based composites, the evaluation and comparison of composites with the addition of EG (expanded graphite) and CNTs (carbon nanotubes) have been conducted in this paper. Composites with additive mass ratios of 1wt%, 3wt%, 5wt% and 7wt% were prepared by melting dispersion. The thermophysical performances of the composites were discussed in terms of melting point, latent heat and thermal conductivity, which were characterized using Fourier transformed infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC) and the transient hot wire (THW) method. The cost effectiveness of the composites was also considered from the point of view of two indexes, i.e., thermal conductivity per unit cost kc and heat capacity per unit cost Qc. The results revealed that the melting point of composites with EG continuously decreased with increasing mass ratio of additive due to the surface energy variation, while for the CNTs composites, it remained nearly constant. The latent heat of both composites gradually decreased as a function of mass ratio because of the replacement of erythritol by additives. The thermal conductivities of the composites also increased continuously with increasing addition of EG/CNTs. At the same mass ratio, EG appeared more effective than CNTs in enhancing the thermal conductivity, especially above 3wt%. The optimal proportion of EG for the erythritol-based composite, with respect to not only the variation of thermal conductivity but also the heat capacity and cost effectiveness, was approximately 4wt%.

Suggested Citation

  • Guo, Shaopeng & Liu, Qibin & Zhao, Jun & Jin, Guang & Wang, Xiaotong & Lang, Zhongmin & He, Wenxiu & Gong, Zhijun, 2017. "Evaluation and comparison of erythritol-based composites with addition of expanded graphite and carbon nanotubes," Applied Energy, Elsevier, vol. 205(C), pages 703-709.
  • Handle: RePEc:eee:appene:v:205:y:2017:i:c:p:703-709
    DOI: 10.1016/j.apenergy.2017.08.046
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    References listed on IDEAS

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    Cited by:

    1. Yuan, Mengdi & Ren, Yunxiu & Xu, Chao & Ye, Feng & Du, Xiaoze, 2019. "Characterization and stability study of a form-stable erythritol/expanded graphite composite phase change material for thermal energy storage," Renewable Energy, Elsevier, vol. 136(C), pages 211-222.
    2. Palacios, Anabel & Cong, Lin & Navarro, M.E. & Ding, Yulong & Barreneche, Camila, 2019. "Thermal conductivity measurement techniques for characterizing thermal energy storage materials – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 108(C), pages 32-52.
    3. Paul, John & Pandey, A.K. & Mishra, Yogeshwar Nath & Said, Zafar & Mishra, Yogendra Kumar & Ma, Zhenjun & Jacob, Jeeja & Kadirgama, K. & Samykano, M. & Tyagi, V.V., 2022. "Nano-enhanced organic form stable PCMs for medium temperature solar thermal energy harvesting: Recent progresses, challenges, and opportunities," Renewable and Sustainable Energy Reviews, Elsevier, vol. 161(C).
    4. Li, Wei & Klemeš, Jiří Jaromír & Wang, Qiuwang & Zeng, Min, 2020. "Development and characteristics analysis of salt-hydrate based composite sorbent for low-grade thermochemical energy storage," Renewable Energy, Elsevier, vol. 157(C), pages 920-940.
    5. Liu, Yali & Li, Ming & Emam Hassanien, Reda Hassanien & Wang, Yunfeng & Tang, Runsheng & Zhang, Ying, 2024. "Fabrication of shape-stable glycine water-based phase-change material using modified expanded graphite for cold energy storage," Energy, Elsevier, vol. 290(C).
    6. Zhang, Shengqi & Pu, Liang & Mancin, Simone & Ma, Zhenjun & Xu, Lingling, 2022. "Experimental study on heat transfer characteristics of metal foam/paraffin composite PCMs in large cavities: Effects of material types and heating configurations," Applied Energy, Elsevier, vol. 325(C).

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