Abstract: This research investigated the regeneration energy consumption of carbon capture after combustion on a 600 MW supercritical coal-fired unit. Advanced solar thermal system of coal-fired unit based on carbon capture，the working principle and absorption mechanism of the carbon capture system were discussed. The evaluation index of economic for the integrated system was also set up. The economic effects of the carbon capture rate on the integrated system were calculated using the method of sensitivity analysis. The results showed that when the concentration of cholamine was 30%，carbon capture rate was 85%，meanwhile the local sunlight reached the best radiation intensity of 500 W/m2，thermal efficiency of the solar system was 43.604% and the generating cost of solar coal-fired units was 0.5606￥/(kW?h)，with 0.5557￥/(kgCO2) of the mitigation costs.

Key words: solar energy, carbon capture rate, thermal economy index, generation cost

摘要： 针对碳捕集系统对燃煤机组热经济性方面的影响，以600MW超临界燃煤机组为研究对象，研究了燃烧后碳捕集的再生能耗，提出了基于碳捕集的太阳能辅助燃煤机组热力系统集成方案，阐述了该集成系统碳捕集的工作原理和吸收机理，建立了集成系统热经济性评价指标。利用系统灵敏度分析法，计算了碳捕集率对集成系统热经济性的影响，并将相关数据绘制成曲线图加以对比分析。结果表明：当乙醇胺溶液浓度为30%、CO2捕集率为85%、当地日照达到最佳辐射强度500W/m2时，该太阳能集成系统的热效率为43.604%，此时太阳能-燃煤机组碳捕集电站的发电成本为0.5606￥/(kW?h)，CO2的减排成本为0.5557￥/(kgCO2)。

关键词: 太阳能, 碳捕集率, 热经济性指标, 发电成本