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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Consideration on the T-history Method for Measuring Heat of Fusion of Phase Change Materials

PCM의 잠열측정을 위한 T-history법에 대한 고찰

  • 박창현 (경희대학교 대학원 기계공학과) ;
  • 최주환 (서울대학교 대학원 기계항공공학부) ;
  • 홍희기 (경희대학교 기계산업시스템공학부)
  • Published : 2001.12.01
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Abstract

Though conventional calorimetry methods such as differential scanning calorimetry (DSC) and differential thermal analysis (DTA) are used generally in measuring heat of fusion, T-history method has the advantages of a simple experimental apparatus and no requirements of sampling process, which is particularly useful for measuring thermal properties of inhomogeneous phase change materials (PCMs) in sealed tubes. However, random criteria (a degree of supercooling) used in selecting the range of latent heat release and neglecting sensible heat during the phase change process can cause significant errors in determining the heat of fusion. In the present study, it was shown that a 40% discrepancy exists between the original T-history and the present methods when analyzing the same experimental data. As a result, a reasonable modification to the original T-history method is proposed.

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References

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