Thermodynamic characteristics and economic study of a 600 MW oxyfuel coal-fired unit integrated with compressed air energy storage

张智羽; 宋海辉; 张波; 秦龙; 王圣杰

doi:10.19666/j.rlfd.202505101

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Thermodynamic characteristics and economic study of a 600 MW oxyfuel coal-fired unit integrated with compressed air energy storage

Thermal Power Generation Vol. 55, Issue 2, Pages: 117-127(2026)

更新时间：2026-08-07

- Thermodynamic characteristics and economic study of a 600 MW oxyfuel coal-fired unit integrated with compressed air energy storage
- 作者机构：
  
  1. 内蒙古科技大学能源与环境学院
  2. 内蒙古自治区新型重要能源综合利用技术集成攻关大平台
  3. 中央民族大学经济学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202505101
  CLC： TM621
- Published：2026
- 稿件说明：
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[1]张智羽,宋海辉,张波,等.压缩空气储能耦合600 MW富氧燃煤机组热力特性及经济性研究[J].热力发电,2026,55(02):117-127.
[1]张智羽,宋海辉,张波,等.压缩空气储能耦合600 MW富氧燃煤机组热力特性及经济性研究[J].热力发电,2026,55(02):117-127. DOI： 10.19666/j.rlfd.202505101.

DOI：10.19666/j.rlfd.202505101.

摘要

【目的】降低火电机组碳排放和提升富氧燃烧发电机组灵活性。【方法】基于能量梯级利用原理，采用流程模拟的方法建立了压缩空气储能耦合富氧燃煤机组模型，提出了不同耦合方案，对耦合机组建模并开展热力特性以及经济性分析。【结果】结果表明，通过烟气余热替代汽轮机抽汽预热透平入口空气、HE1—HE3换热器换热效率为89%，透平温度升高至115℃时，压缩空气储能系统的循环效率最高可达74.33%，较独立压缩空气储能系统高24.25%。考虑碳排放权、CO

售出以及碳税时，耦合机组静态回收周期为11.256年，小于常规机组，此时净现值NPV、内部收益率IRR分别为80 173万元、9.63%，均高于常规机组，这表明耦合机组较常规机组具有更好的经济性；碳税加大了耦合机组的平准化电力成本β

LCOE

，碳排放权售出以及CO

售出会显著降低耦合机组的平准化电力成本β

LCOE

；当碳税、碳排放权售出价格、CO

售出价格分别高于6.4、73.9、14.68元/t时，耦合机组平准化电力成本β

LCOE

低于常规机组；敏感性分析显示，煤炭价格对耦合机组影响最大，其次为碳排放权价格、CO

售价、碳税。【结论】所提出的火电-储能深度耦合的低碳化路径为构建新型电力系统下燃煤机组低碳排放、加快火电机组向调节性电源转型提供了理论依据与工程参考。

Abstract

[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 oxygenenriched coal-fired units was proposed based on energy complementary utilization principles. Various coupling sch

emes 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

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 CO

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 CO

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

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.

关键词

Keywords

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