热力发电2025，Vol.54Issue(10)：73-81,9.DOI:10.19666/j.rlfd.202412266
300MW超临界二氧化碳布雷顿循环富氧燃烧发电机组热力特性分析
Study on thermodynamic performance of a 300 MW supercritical carbon dioxide Brayton cycle oxyfuel generating unit
摘要
Abstract
A 300 MW supercritical carbon dioxide(S-CO2)Brayton cycle oxyfuel power generation system is designed,and a simulation model is constructed using process simulation methods to study the effects of key operating parameters(such as the primary dry cycle flue gas ratio,the economizer side split ratio,the cold primary air temperature and the high-pressure turbine inlet pressure)on the system's thermal performance indexes.The effects of key operating parameters such as primary dry cycle flue gas ratio,economizer side split ratio,cold primary air temperature and high-pressure turbine inlet pressure on the system thermodynamics were investigated,and the thermal characteristics of the generating unit were revealed.The results show that,the boiler efficiency decreases with the increase of the proportion of primary dry-cycle flue gas,and when the proportion of primary dry-cycle flue gas reaches 50%,the net electric efficiency of the system is the highest,which is 42.93%.The boiler efficiency rises at first and then decreases with the increase of the coal economizer-side shunt ratio,and the net electric efficiency of the system reaches the highest(42.86%)when the coal economizer-side shunt ratio is 11%.With the increase of cold primary air temperature,the boiler efficiency keeps increasing,and the rising trend slows down and stabilizes at 99.29%at temperatures higher than 65℃,and the net electric efficiency of the system keeps increasing and reaches 43.06%at 95℃.With the increase of high-pressure turbine inlet pressure,the boiler efficiency firstly rises and then decreases,and reaches the maximum value of 99.35%at 29.5 MPa,and the net electric efficiency of the system reaches the optimal value(43.66%)at 29.0 MPa.关键词
超临界二氧化碳/富氧燃烧/热力特性/运行参数优化Key words
supercritical carbon dioxide/oxyfuel combustion/thermal property/operating parameters optimization引用本文复制引用
张智羽,张波,秦龙,宋海辉,朱琳,肖卓楠,王圣杰..300MW超临界二氧化碳布雷顿循环富氧燃烧发电机组热力特性分析[J].热力发电,2025,54(10):73-81,9.基金项目
内蒙古自然科学基金项目(2022MS05036) （2022MS05036）
内蒙古自治区直属高校基本科研业务费项目(2023QNJS141) （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) （2025YFHH0099）
Basic Research Operating Expenses Program for Colleges and Universities Directly under the Inner Mongolia Autonomous Region(2023QNJS141) （2023QNJS141）
Key Research and Development and Achievement Transformation Program of Inner Mongolia Autonomous Region(2025YFHH0099) （2025YFHH0099）
