Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Preparation and Thermal Properties of Octadecane/xGnP Shape-Stabilized Phase Change Materials to Improve the Heat Storage Performance of Buildings

건축물 축열성능 향상을 위한 Octadecane/xGnP SSPCM 제조 및 열적성능 분석

  • Kim, Sughwan (Building Environment and Materials Lab., School of Architecture, Soongsil University) ;
  • Jeong, Su-Gwang (Building Environment and Materials Lab., School of Architecture, Soongsil University) ;
  • Lee, Jeong-Hun (Building Environment and Materials Lab., School of Architecture, Soongsil University) ;
  • Kim, Sumin (Building Environment and Materials Lab., School of Architecture, Soongsil University)
  • 김석환 (숭실대학교 건축학부 건축환경재료연구실) ;
  • 정수광 (숭실대학교 건축학부 건축환경재료연구실) ;
  • 이정훈 (숭실대학교 건축학부 건축환경재료연구실) ;
  • 김수민 (숭실대학교 건축학부 건축환경재료연구실)
  • Received : 2012.11.16
  • Published : 2013.03.10
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Abstract

In this study, a shape-stabilized phase change material (SSPCM) was prepared by octadecane and exfoliated graphite nanoplate (xGnP) in a vacuum, to improve thermal storage performance. The octadecane as an organic phase change material (PCM) is very stable against phase separation of PCM, and has the proper temperature range for thermal comfort in the building; and the xGnP is a porous carbon nano-material. Scanning electron microscope (SEM) and Fourier transformation infrared spectrophotometer (FT-IR) were used to confirm the chemical and physical stability of the Ocatadecane/xGnP SSPCM. In addition, thermal properties were determined by Deferential scanning calorimeter (DSC), and Thermogravimetric analysis (TGA). The specific heat of Octadecane/xGnP SSPCM was $14.1J/g{\cdot}K$ at $31.3^{\circ}C$. The melting temperature ranges of melting and freezing were found to be $26{\sim}35^{\circ}C$ and $26{\sim}19^{\circ}C$, respectively. At this time, the latent heats of melting and freezing were 110.9 J/g and 104.5 J/g, respectively. The Octadecane was impregnated into xGnP by as much as about 56.0% of the Octadecane/xGnP SSPCM's mass fraction.

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References

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