A Study on Cooling Characteristics of Clathrate Compound with Concentration of TMA

TMA 농도에 따른 포접화합물의 냉각특성에 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 기계정보공학과) ;
  • 김창오 (조선대학교 대학원 기계설계공학과)
  • Published : 2005.02.01

Abstract

This study is investigated the cooling characteristics of the TMA clathrate compound including TMA (Tri-methyl-amine, (CH₃)₃N) of 20~25 wt% as a low temperature storage material at -5℃ heat source. The results showed that as the concentration of TMA is increased, phase change temperature and specific heat are increased, but the supercooling and retention time of liquid phase are decreased. Especially, low temperature storage material containing TMA 25 wt% has the average of phase change temperature of 5.8℃, supercooling of 8.0℃, retention time of liquid phase for 10 minutes and specific heat of 4.099 kJ/kg℃ in the cooling process. From the results of this study, TMA clathrate compound showed higher phase change temperature than water md supercooling repression effect.

본 연구는 저온축열물질로서 TMA(Tri-methyl-amine, (CH₃)₃N)를 20~25 wt%로 포함하고 있는 TMA-물계 포접화합물의 냉각특성에 대하여 냉열원온도 -5℃에서 실험적으로 연구를 수행하였다. 연구결과, TMA의 질량농도가 증가할수록 상변화온도와 비열이 증가하였으며, 과냉도가 감소하고 액상유지시간이 단축되었다 특히, TMA 25wt%를 포함한 TMA-물계 포접화합물은 상변화온도 평균 5.8℃, 과냉도 8.0℃, 액상유지시간 10분, 비열 4.099kJ/kg℃를 나타내었다. 본 연구의 결과로부터 TMA-물계 포접화합물은 물보다 높은 상변화온도를 나타내었으며, 과냉도가 감소하고, 액상유지시간이 단축되는 과냉각 억제효과를 확인 할 수 있었다.

Keywords

References

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