具备碳捕集功能的半闭式再压缩超临界二氧化碳布雷顿循环的经济性分析  

Economic analysis of semi-closed re-compression S-CO_(2) Brayton cycle with inherent CO_(2) capture

作　　者：俞骏 刘晓锋[2] YU Jun;LIU Xiaofeng(China Huaneng Group Co.,Ltd.,Beijing 100031,China;Jiangsu Frontier Power Technology Co.,Ltd.,Nanjing 210003,China)

机构地区：[1]中国华能集团有限公司,北京100031 [2]江苏方天电力技术有限公司,江苏南京210003

出　　处：《热力发电》2022年第10期35-41,共7页Thermal Power Generation

基　　金：国家重点研发计划项目(2018YFB0605303)。

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%。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.

关 键 词：S-CO_(2)布雷顿循环 经济性 碳捕集 平准化发电成本 

分 类 号：TK-9[动力工程及工程热物理]