热力发电2023，Vol.52Issue(11)：67-75,9.DOI:10.19666/j.rlfd.202302021
燃气轮机/超临界二氧化碳联合循环余热利用及动态特性分析
Analysis of waste heat utilization and dynamic characteristics of gas turbine/supercritical carbon dioxide combined cycle
摘要
Abstract
Supercritical carbon dioxide cycle has many advantages such as small turbine size,small compressor power consumption and high cycle efficiency.In order to explore the cycle configuration with the highest power generation efficiency after the power generation system of supercritical carbon dioxide cycle coupled gas turbine,four cycle layouts were proposed.The main parameters of the circulating system were optimized by genetic algorithm with the maximum circulating efficiency as the optimization objective.Among the four schemes,the gas turbine/two-turbine supercritical carbon dioxide combined cycle system has the highest cycle efficiency,which is 44.87％.And the dynamic system analysis of the scheme,with the bottom cycle input heat load as the disturbance variable,explore the dynamic response of the system after the step reduction from full load to 90％load,80％load and 70％load respectively.The results show that the response time of parameters near the flue gas heat exchanger is faster and the response time is longer when the shadow of thermal inertia is farther away from the flue gas heat exchanger in the working medium flow.At the same position,the response time of pressure is slightly longer than that of temperature,and the drop range of parameters near the high-temperature turbine is greater than that of the low-temperature turbine.关键词
临界二氧化碳循环/余热利用/动态特性/变负荷/响应速度Key words
supercritical carbon dioxide cycle/waste heat utilization/dynamic characteristic/variable load/response speed引用本文复制引用
王渡,王志刚,张锦坤,任鑫,王廷举,万明元..燃气轮机/超临界二氧化碳联合循环余热利用及动态特性分析[J].热力发电,2023,52(11):67-75,9.基金项目
国家自然科学基金项目(52076126)National Natural Science Foundation of China(52076126) （52076126）
