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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Improving the Precision for the T-history Method for Latent Heat Measurements of Low Melting Temperature PCMs

T-history법에 의한 저온 PCM 잠열측정의 정밀도 향상

  • Lee Yoonsuk (Graduate School, KyungHee University) ;
  • Peck Jong Hyeon (Korea Institute of Industrial Technology) ;
  • Kang Chaedong (Dept. of Mechanical Engineering, Chonbuk National University) ;
  • Hong Hiki (School of Mechanical and Industrial System Engineering, KyungHee University)
  • 이윤석 (경희대학교 대학원) ;
  • 백종현 (한국생산기술연구원) ;
  • 강채동 (전북대학교 기계항공시스템공학부) ;
  • 홍희기 (경희대학교 기계산업시스템공학부)
  • Published : 2005.03.01
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Abstract

When test tubes for PCM with melting point lower than a room temperature are installed vertically as the T-history method proposes, there exists a temperature distribution in the longitudinal direction by natural convection, which lowers the precision of measured heat-of-fusion. The purpose of the present work is to improve the precision by arranging the test tubes horizontally, while maintaining the simplicity and convenience. Assuming that the amount of heat transfer is very small through the vapor space formed in the upper part of the tubes by volumetric change, the obtained value by the T-history method using the latent heat period bounded by two inflection points is in good agreement with that of the literature. Also, the scattering of measured values by the proposed method decreases markedly compared to that of vertical positioning.

Keywords

References

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