摘要
CO_(2)混合工质可以有效解决纯CO_(2)动力循环存在的操作压力高、与冷源匹配不佳等问题。为了揭示纯CO_(2)动力循环与CO_(2)混合工质动力循环的动态响应特性差异,指导CO_(2)混合工质动力循环台架的实际运行,该文搭建CO_(2)/H_(2)S混合工质动力循环系统的动态仿真平台,并采用实验数据进行模型验证。初步探究不同H_(2)S质量分数下CO_(2)混合工质动力循环在冷热源以及泵转速扰动下的开环动态响应特性,并进一步分析其闭环负荷追踪特性。结果表明,CO_(2)/H_(2)S混合工质动力循环系统可以有效提高系统在不同边界扰动下的热效率,且热效率随着H_(2)S质量分数的增加而增加。此外,添加H_(2)S工质可以有效减小负荷追踪下热效率随负荷下降而减小的幅值。结果可为CO_(2)混合工质动力循环台架的实际运行提供一定理论指导。
The introduction of CO_(2) mixture can effectively address issues such as high operating pressures and inadequate matching with cold sources in the pure CO_(2) power cycle.To reveal the differences in dynamic response performance between a pure CO_(2) power cycle and a CO_(2) mixture power cycle,and to guide the practical operation of CO_(2) mixture power cycle test rigs,a dynamic simulation model of CO_(2)/H_(2)S mixture power cycle is developed,and experimental data are utilized for model validation.Initial investigations are conducted on the open-loop dynamic performance of CO_(2) mixture power cycle with varying mass fractions of H_(2)S under the perturbation of cold and heat sources,as well as pump speeds,followed by a more in-depth analysis of the closed-loop load following performance of the CO_(2) mixture power cycle.The results show that the thermal efficiency of a CO_(2)/H_(2)S mixture power cycle improves under different boundary perturbations compared to the pure CO_(2) power cycle.Additionally,the thermal efficiency increases as the mass fraction of H_(2)S increases.Moreover,the addition of H_(2)S can effectively minimize the decrease in thermal efficiency with load during load-following operation.The findings offer theoretical guidance for the practical implementation of the CO_(2) mixture power cycle.
作者
边幸燕
王轩
凌智
王瑞
田华
舒歌群
BIAN Xingyan;WANG Xuan;LING Zhi;WANG Rui;TIAN Hua;SHU Gequn(State Key Laboratory of Engines(Tianjin University),Nankai District,Tianjin 300072,China;Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,Anhui Province,China)
出处
《中国电机工程学报》
北大核心
2025年第14期5381-5391,I0004,共12页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
基金
国家重点研发计划项目(2022YFE0100100)。
