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OA
Thermodynamic characteristics and economic study of a 600 MW oxyfuel coal-fired unit integrated with compressed air energy storage
[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、CO2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βLCOE,碳排放权售出以及 CO2 售出会显著降低耦合机组的平准化电力成本βLCOE;当碳税、碳排放权售出价格、CO2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βLCOE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、CO2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.
[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.
张智羽;宋海辉;张波;秦龙;王圣杰
内蒙古科技大学能源与环境学院,内蒙古 包头 014017||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,内蒙古 包头 014017内蒙古科技大学能源与环境学院,内蒙古 包头 014017||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,内蒙古 包头 014017内蒙古科技大学能源与环境学院,内蒙古 包头 014017||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,内蒙古 包头 014017内蒙古科技大学能源与环境学院,内蒙古 包头 014017||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,内蒙古 包头 014017中央民族大学经济学院,北京 100081
先进绝热压缩空气储能富氧燃烧热力特性经济性分析
advanced adiabatic compressed air energy storageoxyfuel combustionthermodynamic characteristicseconomic analysis
《热力发电》 2026 (2)
117-127,11
内蒙古自然科学基金(2022MS05036)内蒙古自治区直属高校基本科研业务费项目(2023QNJS141)内蒙古自治区重点研发和成果转化计划项目(2025YFHH0099) 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)
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