Research progress on thermodynamic properties of supercritical carbon dioxide mixture

QIAO Jiafei; LI Zhuo; LIAO Haiyan; WANG Bingbing; LIU Hangtao; DUAN Yuanyuan

doi:10.19666/j.rlfd.202205084

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Research progress on thermodynamic properties of supercritical carbon dioxide mixture

Thermal Power Generation Vol. 51, Issue 9, Pages: 1-10(2022)

更新时间：2025-09-28

- Research progress on thermodynamic properties of supercritical carbon dioxide mixture
- 作者机构：
  
  1. 国家能源集团新能源技术研究院有限公司
  2. 清华大学热科学与动力工程教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202205084
  CLC： TK121
- Published：2022
- 稿件说明：
移动端阅览
QIAO Jiafei, LI Zhuo, LIAO Haiyan, et al. Research progress on thermodynamic properties of supercritical carbon dioxide mixture[J]. Thermal Power Generation, 2022, 51(9): 1-10.
DOI：

QIAO Jiafei, LI Zhuo, LIAO Haiyan, et al. Research progress on thermodynamic properties of supercritical carbon dioxide mixture[J]. Thermal Power Generation, 2022, 51(9): 1-10. DOI： 10.19666/j.rlfd.202205084.

摘要

超临界二氧化碳(S-CO_2)循环因清洁、高效、低碳的特性受到广泛关注

其中半闭式循环使用的工质为CO_2混合体系

因此对CO_2混合体系热力学性质的认识和描述提出了新的要求。本文综述了含CO_2混合体系热力学性质的研究进展

并结合S-CO_2循环系统设计需求对研究现状进行分析。结果表明:相对于CO_2纯工质

CO_2混合体系的单相区密度(即pvTx性质)、比热容、声速等基础数据均非常缺乏;已有的半理论状态方程精度需要进一步提升

多参数状态方程需扩大有效应用范围。建议面向S-CO_2循环需求

开展有针对性的热物性实验与理论研究工作。

Abstract

Supercritical carbon dioxide(S-CO_2) cycle has attracted extensive attention due to its clean

high-efficiency and low-carbon characteristics. The working fluid used in semi-closed S-CO_2 cycle is CO_2 mixtures

so a deeper understanding and description of thermodynamic properties of the CO_2 mixutres is required during the research. Based on a critical review

the present knowledge gaps in the experimental data and calculation models of the mixtures containing CO_2 are identified. The analysis shows that

basic experimental data of single-phase density(i.e. PVTx property)

specific heat capacity and sound velocity of CO_2 mixure system are very scarce. The accuracy of the existing semi-theoretical equation of state needs further improvement. The multi-parameter equation of state needs to improve the effective application range. It is recommended to carry out well-targeted experimental and theoretical research to meet the requirements of the S-CO_2 cycle.

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