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
摘要(Abstract):
【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_2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_2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_2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_2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。
关键词(KeyWords): 先进绝热压缩空气储能;富氧燃烧;热力特性;经济性分析
基金项目(Foundation): 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)~~
作者(Author): 张智羽,宋海辉,张波,秦龙,王圣杰
DOI: 10.19666/j.rlfd.202505101
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