作者：高明, 申楠楠, 章立新, 杨其国, 刘婧楠

作者单位：上海理工大学能源与动力工程学院 上海市动力工程多相流动与传热重点实验室，上海 200093

关键词：超临界二氧化碳;物性测量;粘度;密度;热导率

摘要：

对于超临界二氧化碳（S-CO₂）物性参数的获取，一般可从美国国家标准与技术研究院（NIST）直接查询，但S-CO₂在临界点处物性发生剧烈变化。在实际工业应用中，S-CO₂的密度、粘度和热导率这3个方面对与超临界二氧化碳布雷顿循环的研究有着很重要的作用，为了解目前S-CO₂物性的测量方法，该文对当前所涉及到的S-CO₂基本物性测量方法进行梳理，包括密度测量法中的可变体积法、单双沉浮法、振动管法；导热率测量法中的平板法、双圆筒和热线法；粘度测量中的落球法、粒子沉降法、旋转体法、振动盘法、振动线法。在对物性测量方法的整理后，提出可使用振动梁法测量S-CO₂的密度，振动线法测量S-CO₂的粘度，平板法测量S-CO₂的热导率。

Review of measurement methods for physical parameters of supercritical carbon dioxide
GAO Ming, SHEN Nannan, ZHANG Lixin, YANG Qiguo, LIU Jingnan
Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Abstract: The physical properties of supercritical carbon dioxide (S-CO₂) change drastically at the critical point. The acquisition of physical properties of S-CO₂ can generally be directly inquired from the National Institute of Standards and Technology. In practical industrial applications, the three aspects of S-CO₂ density, viscosity and thermal conductivity play an important role in the research of supercritical carbon dioxide Brayton cycle. In order to understand the current measurement methods of S-CO₂ physical properties, this article presents the basic physical properties measurement methods of S-CO₂ involved, introducing variable volume method, single/ double sinking densitometer and vibrating tube method to measure density; falling ball method, particle-velocity method, rotating cylinder body method, oscillating-disk viscometer and vibrating-wire viscometer; parallel plate method, concentric cylinder and hot wire transient method to measure thermal conductivity. After finishing the physical property measurement methods, it was found that the vibrating cantilevers method can be used to measure the density of S-CO₂, the vibrating-wire method can be used to measure the viscosity of S-CO₂ and the parallel plate method to measure the thermal conductivity of S-CO₂.
Keywords: S-CO₂;physical property measurement;viscosity;density;thermal conductivity
2021, 47(2):32-43  收稿日期: 2020-07-24;收到修改稿日期: 2020-08-25
基金项目: 国家自然科学基金（51976127）
作者简介:
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