Home Journals Articles Updates About
CN
image
收藏切换
Thermodynamic characteristics and economic study of a 600 MW oxyfuel coal-fired unit integrated with compressed air energy storage
收藏切换
PDF
Zhiyu ZHANG1, 2, Haihui SONG1, 2, Bo ZHANG1, 2, Long QIN1, 2, Shengjie WANG3
Thermal Power Generation | 2026, 55(2) : 117 - 127
Less
收藏切换
Thermal Power Generation | 2026, 55(2): 117-127
• Peak shaving and frequency regulation technology for energy storage system coupled with thermal power unit •
Thermodynamic characteristics and economic study of a 600 MW oxyfuel coal-fired unit integrated with compressed air energy storage
Full
Zhiyu ZHANG1, 2, Haihui SONG1, 2, Bo ZHANG1, 2, Long QIN1, 2, Shengjie WANG3
Affiliations
  • 1.School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014017, China
  • 2.Integrated Research Large Platform for Comprehensive Utilization Technologies of New Important Energy, Baotou 014017, China
  • 3.School of Economics, Minzu University of China, Beijing 100081, China
Published: 2026-02-25 doi: 10.19666/j.rlfd.202505101
Outline
收藏切换
[Objective]

This paper aims to reduce carbon emissions and enhance the operational flexibility of coal-fired power units.

[Methods]

A coupled system integrating compressed air energy storage (CAES) with oxygen-enriched coal-fired units was proposed based on energy complementary utilization principles. Various coupling schemes were proposed, and the thermodynamic performance and economic feasibility of the integrated system were analyzed.

[Results]

The results show that by replacing steam turbine extraction with flue gas waste heat to preheat the turbine inlet air, when the heat exchange efficiency of HE1–HE3 is 89% and turbine inlet temperature is raised to 115 ℃, the round-trip efficiency of the CAES system can reach a maximum of 74.33%, representing a 24.25% improvement over the standalone CAES system. When carbon allowances, CO2 revenue, and carbon taxes are considered, the coupled system achieves a static payback period of 11.256 years, shorter than that of the conventional unit. In this case, the net present value (NPV) and internal rate of return (IRR) reach 801.73 million yuan and 9.63%, respectively, both exceeding those of the conventional system, indicating better economic performance. Carbon taxes increase the levelized cost of electricity (βLCOE) of the coupled unit, while carbon allowance trading and CO2 sales significantly reduce the βLCOE. The βLCOE of the coupled unit becomes lower than that of the conventional unit when the carbon tax, carbon allowance price, and CO2 price exceed 6.4 yuan/t, 73.9 yuan/t, and 14.68 yuan/t, respectively. Sensitivity analysis reveals that coal price has the greatest impact on the economic performance of the coupled unit, followed by the carbon allowance price, CO2 price, and carbon tax.

[Conclusion]

The proposed low-carbon pathway for the deep integration of thermal power and energy storage offers theoretical and engineering guidance for promoting low-carbon emissions from coal-fired power units and accelerating their transition into flexible, dispatchable power sources under the framework of a new power system.

advanced adiabatic compressed air energy storage  /  oxyfuel combustion  /  thermodynamic characteristics  /  economic analysis
Zhiyu ZHANG, Haihui SONG, Bo ZHANG, Long QIN, Shengjie WANG. Thermodynamic characteristics and economic study of a 600 MW oxyfuel coal-fired unit integrated with compressed air energy storage[J]. Thermal Power Generation, 2026 , 55 (2) : 117 -127 . DOI: 10.19666/j.rlfd.202505101
Funding
Less
  • Inner Mongolia Natural Science Foundation(2022MS05036)
  • Basic Scientific Research Operating Expenses Program of Universities Directly Under Inner Mongolia Autonomous Region(2023QNJS141)
  • Key Research and Development and Achievement Transformation Program of Inner Mongolia Autonomous Region(2025YFHH0099)
Appendix
Less
Year 2026 volume 55 Issue 2
PDF
202
98
Cite this Article
BibTeX
Article Info
doi: 10.19666/j.rlfd.202505101
  • Receive Date：2025-05-15
  • Online Date：2026-08-14
  • Published：2026-02-25
Article Data
Affiliations
History
  • Received：2025-05-15
  • Revised：2025-07-04
  • Accepted：2025-07-11
Funding
Inner Mongolia Natural Science Foundation(2022MS05036)
Basic Scientific Research Operating Expenses Program of Universities Directly Under Inner Mongolia Autonomous Region(2023QNJS141)
Key Research and Development and Achievement Transformation Program of Inner Mongolia Autonomous Region(2025YFHH0099)
Affiliations
    1.School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014017, China
    2.Integrated Research Large Platform for Comprehensive Utilization Technologies of New Important Energy, Baotou 014017, China
    3.School of Economics, Minzu University of China, Beijing 100081, China
References
Share
https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202505101
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House