热力发电2025，Vol.54Issue(2)：21-29,9.DOI:10.19666/j.rlfd.202406151
新型双路超临界二氧化碳循环光煤互补发电系统热力性能
Thermodynamic performance of a novel dual-channel supercritical carbon dioxide cycle solar hybrid coal-fired power system
摘要
Abstract
In reheat and recompression cycle system,the high-pressure carbon dioxide fluid has high temperature at outlet of the high-temperature reheater,resulting in insufficient heat absorption of the working fluid entering the heat source heater.To solve this problem,the model of a supercritical carbon dioxide(S-CO2)cycle photovoltaic coal complementary power generation system is established using Aspen Plus software.On the basis of the reheat-recompression cycle system,a novel dual-channel S-CO2 cycle solar hybrid coal-fired power system is proposed.Moreover,the performance of the above two systems is analyzed and compared by applying the exergy analysis method.The results indicate that,the exergy efficiency of the new system can reach 40.578%,which is 3.494 percentage points higher than that of the reheat-recompression cycle system,and the exergy efficiency of the S-CO2 cycle subsystem increases by 11.853 percentage points.The improvement of the exergy efficiency of the novel system can be attributed to the new path layout,which brings the third stage turbine to do work through full utilization of regenerative heat from the high temperature regenerator and reduces exergy losses from the main compressor and high temperature regenerator.Additionally,the contribution of solar energy in the new system is greater,resulting in an increase in output exergy from 9.846%to 10.059%.关键词
超临界二氧化碳循环/光煤互补发电/Aspen Plus模拟/㶲分析/㶲效率Key words
supercritical dioxide cycle/solar hybrid coal-fired power generation/Aspen Plus simulation/exergy analysis/exergy efficiency引用本文复制引用
郝艳红,宋竹林,张勇,田永杰,白静利..新型双路超临界二氧化碳循环光煤互补发电系统热力性能[J].热力发电,2025,54(2):21-29,9.基金项目
山西省基础研究计划面上项目(202303021221077) （202303021221077）
中央引导地方科技发展资金项目(YDZX20201400001939) （YDZX20201400001939）
山西省研究生教育创新项目(2022Y133) General Project of Basic Research Plan in Shanxi Province(202303021221077) （2022Y133）
Central Guide Local Science and Technology Development Fund Project(YDZX20201400001939) （YDZX20201400001939）
Postgraduate Education Innovation Project of Shanxi Province(2022Y133) （2022Y133）
