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热物性实验中工质纯化方法及杂质影响研究 被引量：2

Purification and impurity analysis of fluids in thermophysical property measurements
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摘要 工质纯度是影响高精度流体热物性实验可靠性的重要因素之一。该文以丙烷族氢氟烃类工质1,1,1,3,3,3-六氟丙烷(HFC-236fa)为例,研究了工质成分分析和纯化方法,采用液氮除气及移除富含杂质相态工质的实验操作,有效降低实验工质内各类不凝性及可凝性杂质的含量。采用气相色谱仪定量分析了纯化过程中杂质的变化规律,通过气相色谱-质谱联用系统确定了主要杂质的种类,应用理想溶液模型计算了杂质对工质热物理性质的影响。开展了丙烷及HFC-236fa的饱和蒸气压实验。结果表明,经纯化后不同来源实验工质的饱和蒸气压实验结果具有较高的一致性。 Impurities in working fluids greatly affect the reliability of results in thermophysical property measurements.Purification procedure of 1,1,1,3,3,3-hexafluoropropane（HFC-236fa） was showed as an example to provide a general method for fluids purification based on different thermophysical properties.The gas chromatograph and gas chromatograph mass spectrum were used to analyze the impurities.Ideal solution model was used to estimate the effect of impurities on vapor pressure of HFC-236fa.Vapor pressure measurement of propane before and after purification proved the efficiency of the purification and the HFC-236fa samples from two different suppliers agreed well after the purification procedure.
作者 冯晓娟 段远源 刘强 周孟夏
机构地区 清华大学热科学与动力工程教育部重点实验室 中国计量科学研究院
出处 《清华大学学报（自然科学版）》 EI CAS CSCD 北大核心 2011年第12期1855-1859,共5页 Journal of Tsinghua University(Science and Technology)
基金 国家自然科学基金资助项目(51076074 50636020)
关键词 热物性 实验工质 纯化 饱和蒸气压 气相色谱 质谱 thermophysical properties fluids purification vapor pressure gas chromatograph mass spectrum
分类号 TK121 [动力工程及工程热物理—工程热物理] TK123 [动力工程及工程热物理—工程热物理]
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参考文献11

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同被引文献18

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清华大学学报（自然科学版）
2011年 第12期

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