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Received November 3, 2009
Accepted December 9, 2009
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수정된 T-history 법을 이용한 유기 상전이 물질들의 열 물성 측정
Measurement of Thermo-physical Properties of Organic Phase Change Materials using Modified T-history Method
1충남대학교 화학공학과, 305-764 대전광역시 유성구 궁동 220 2(주)에네트, 320-711 충남 논산시 내동 26 3건양대학교 화학공학과, 320-711 충남 논산시 내동 26
1Department of Chemical Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea 2ENET Co., B105, Konyang University, 26 Nae-dong, Nonsan, Chungnam 320-711, Korea 3Department of Environmental Chemical Engineering, Konyang University, 26 Nae-dong, Nonsan, Chungnam 320-711, Korea
hchoi@cnu.ac.kr
Korean Chemical Engineering Research, February 2010, 48(1), 93-97(5), NONE Epub 4 March 2010
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Abstract
본 연구에서는 수정된 T-history 법을 사용하여 백신 또는 의약품들의 수송 시 냉매로 사용될 수 있는 0~15 ℃의 상전이 온도를 갖는 유기 상전이 소재들과 이중 두 물질의 혼합물들의 열용량, 잠열, 비열과 같은 열 물성을 측정하였다. 순수한 파라핀들을 측정한 결과, 각 물질들의 상전이 온도를 고려하여 최적의 냉각 속도를 유지하며 측정을 하는 것이 열물성의 신뢰성을 향상시킬 수 있음을 알 수 있었고, 특히 혼합물의 열 물성 측정에 적용할 경우, 수정된 T-history 법의 사용은 기존의 DSC 분석에 사용하는 시료의 양이 소량이므로 유발될 수 있는 결과의 부정확성 등의 문제점을 해결하는데 기여할 수 있음을 알 수 있었다.
In this study, we have measured the thermo-physical properties of pure organic phase change materials (PCMs) and their mixtures which have the melting points from 0 to 15 ℃ by using a modified T-history method. These organic PCMs can be used as coolant materials for packaging and shipping of vaccines. Through measuring the thermophysical properties of pure paraffins, we were able to know that we could improve the reliability of measurement if we considered the melting point of each material and subsequently decided an optimum coolant temperature for each system. The modified T-history method showed a potential usefulness for reliably measuring thermo-physical properties of organic mixtures with avoiding possible inaccuracy of measurement due to using a small amount of sample at DSC measurement.
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Choi E, Cho YI, Lorsch HG, Int. Comm. Heat Mass Transfer, 19, 1 (1992)
