Economic analysis of semi-closed re-compression S-CO<sub>2</sub> Brayton cycle with inherent CO<sub>2</sub> capture

YU Jun; LIU Xiaofeng

doi:10.19666/j.rlfd.202204080

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Economic analysis of semi-closed re-compression S-CO₂ Brayton cycle with inherent CO₂ capture

更新时间：2025-09-28

- Economic analysis of semi-closed re-compression S-CO₂ Brayton cycle with inherent CO₂ capture
- Thermal Power Generation Vol. 51, Issue 10, Pages: 35-41(2022)
- 作者机构：
  
  1. 中国华能集团有限公司
  2. 江苏方天电力技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202204080
  CLC： TM61
- Published：2022
- 稿件说明：
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YU Jun, LIU Xiaofeng. Economic analysis of semi-closed re-compression S-CO₂ Brayton cycle with inherent CO₂ capture[J]. Thermal power generation, 2022, 51(10): 35-41.
DOI：

YU Jun, LIU Xiaofeng. Economic analysis of semi-closed re-compression S-CO₂ Brayton cycle with inherent CO₂ capture[J]. Thermal power generation, 2022, 51(10): 35-41. DOI： 10.19666/j.rlfd.202204080.

摘要

近零排放发电技术是我国实现碳达峰、碳中和目标的重要技术手段之一。针对半闭式再压缩超临界二氧化碳（S-CO_2）布雷顿循环，建立了热力性能计算模型，并基于平准化发电成本和碳捕集成本，构建了其经济性能评价模型，并进行了关键参数的敏感性分析。结果表明：在几乎100%碳捕集率的情况下，半闭式再压缩S-CO_2布雷顿循环的净效率为46.05%，平准化发电成本为609.4元/(MW·h)，碳捕集成本为204.1元/t，远低于我国电力行业的平均碳减排成本。此外，燃料价格对平准化发电成本和碳捕集成本有重要的影响。燃料价格增长40.0%，导致平准化发电成本增长33.6%，碳捕集成本增加17.2%。

Abstract

Near-zero emission power generation technology is one of the important technical means to achieve carbon peak and carbon neutrality in China. A thermodynamic performance calculation model was established for semi-closed re-compression supercritical caobon dioxide(S-CO_2) Brayton cycle

and the economic performance evaluation model was built based on the levelized cost of electricity and carbon capture cost. Morover

sensitivity analysis of key parameters was carried out. The results show that

the net efficiency of the semi-closed recompression S-CO_2 cycle is 46.05%

and the levelized cost of electricity is 609.4 yuan/(MW·h) under the condition of almost 100% carbon capture. The cost of carbon capture is 204.1 yuan/t

which is far lower than the average carbon emission reduction cost of China's power industry. In addition

fuel prices have an important effect on the levelized cost of electricity and carbon capture cost. A 40.0% increase in fuel prices will lead to a 33.6%increase in the levelized cost of electricity and a 17.2% increase in carbon capture costs.

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Economic analysis of semi-closed re-compression S-CO2 Brayton cycle with inherent CO2 capture

DOI：10.19666/j.rlfd.202204080

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Economic analysis of semi-closed re-compression S-CO₂ Brayton cycle with inherent CO₂ capture