Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on the Supercooling Improvement of TMA -Clathrate Compound by Ethanol

에탄올에 의한 TMA- 포접화합물의 과냉각 개선에 대한 연구

  • Kim, Jin-Heung (Department of Mechanical Engineering, Chosun University) ;
  • Chung, Nak-Kyu (Department of Mechanical Information Engineering, Chosun University) ;
  • Kim, Chang-Oh (Department of Mechanical Design Engineering, Graduate School, Chosun University)
  • 김진흥 (조선대학교 기계공학과) ;
  • 정낙규 (조선대학교 기계설계공학과) ;
  • 김창오 (조선대학교 대학원 기계설계공학과)
  • Published : 2005.11.25
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Abstract

This study is investigated the supercooling improvement and the phase change temperature of the TMA clathrate compound including TMA(Tri-Methyl-Amine, ($(CH_3)_3N$) of 25 wt% with additive as a low temperature storage material at $6^{\circ}C$ and $-7^{\circ}C$ of heat source. The additive is ethanol of 0.1, 0.3 wt% and 0.5 wt%. The results showed that as the concentration of ethanol is increased, the phase change temperature, the degree of supercooling and the retention time of liquid phase are decreased. Especially, TMA 25 wt% clathrate compound with ethanol of 0.5wt% has the average of phase change temperature of $3.8^{\circ}C$, degree of supercooling of $0.9^{\circ}C$, $0.8^{\circ}C$ and retention time of liquid phase for 6, 5 minutes at $-6^{\circ}C$, $-7^{\circ}C$ of heat source. From the results of this study, TMA 25wt% clathrate compound with ethanol 0.5wt% showed supercooling repression effect.

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