Study on thermal properties of phase change material by an optical DSC system
Study on thermal properties of phase change material by an optical DSC system
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光学DSC系统研究相变材料的热性能
DOI：
10.1016/j.applthermaleng.2013.06.055
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发表时间：
2013-10
影响因子：
6.4
通讯作者：
王海燕
中科院分区：
文献类型：
--
作者：
王海燕
采用光学差示扫描量热计（DSC）系统研究了相变材料（PCM）的热性能。本文采用光学DSC系统对几种典型pcm的热性能进行了研究。这些PCMs分别是硫酸钠（Na2SO4·10H2O）、石蜡、正十八烷以及不同质量比的石蜡/正十八烷复合物。主要研究了这些相变材料的热性能和微观结构变化。结果表明：Na2SO4·10H2O、石蜡和正十八烷的相变温度和焓值与理论值没有较大的相对偏差（<5%）；实验结果表明，光学DSC系统具有较高的测量精度。对于石蜡/正十八烷烃复合材料，测量的相变温度似乎低于石蜡，并且可以通过改变正十八烷烃的质量分数在24.2℃到49.6℃之间进行调节。正十八烷质量分数为40%时共晶温度最低。测定的相变焓在186.4 J/g（石蜡）和230.5 J/g（正十八烷）之间变化不大。从相变前后的微照片来看，正十八烷以晶体颗粒的形式存在，随着温度的升高逐渐消失，最终与石蜡基体结合。
An optical differential scanning calorimeter (DSC) system was used in studying the thermal properties of phase change material (PCM). In this study, several typical PCMs were studied on its thermal properties by the optical DSC system. These PCMs are sodium sulfate (Na2SO4·10H2O), paraffin,n-octadecane, and the paraffin/n-octadecane composites at different mass ratios. The thermal properties and micro-structure change of these PCMs were mainly investigated. The results showed that for Na2SO4·10H2O, paraffin andn-octadecane, the measured phase change temperatures and enthalpies appeared no large relative deviation (<5%) from the theoretic values. A high measurement accuracy of the optical DSC system has been obtained and concluded from the experimental results. For the paraffin/n-octadecane composites, the measured phase change temperatures appeared to be lower than that of paraffin, and could be adjusted from 24.2 °C to 49.6 °C by changing the mass fractions ofn-octadecane. The lowest eutectic temperature was obtained at the mass fraction 40% ofn-octadecane. The measured phase change enthalpies, however, appeared no large variation between 186.4 J/g (paraffin) and 230.5 J/g (n-octadecane). And according to the micro-photos before and after phase change,n-octadecane existed as crystal particles which disappeared with increasing temperature and finally combined with the paraffin matrix.
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影响因子：
11.2
作者：
Zhang, Zhengguo;Zhang, Ni;Fang, Yutang
通讯作者：
Fang, Yutang
影响因子：
9.9
作者：
Zhang, Huanzhi;Wang, Xiaodong;Wu, Dezhen
通讯作者：
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影响因子：
2.7
作者：
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通讯作者：
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影响因子：
6.7
作者：
HAWES, DW;FELDMAN, D;BANU, D
通讯作者：
BANU, D
影响因子：
0.7
作者：
E. Hsu;Julian F. Johnson
通讯作者：
E. Hsu;Julian F. Johnson