Prospect of Offshore Floating Photovoltaic wind_tech D1

发布：2026-06-09 · 事件：2026-06-09

基于二氧化碳混合工质的发电系统性能分析 董鑫 , 姜文熙 , 赵远扬 Performance Analysis of Power Generation Systems Based on Carbon Dioxide Mixture DONG Xin , JIANG Wenxi , ZHAO Yuanyang Article Text (iFLYTEK Translation) × Close Di...

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基于二氧化碳混合工质的发电系统性能分析 董鑫 , 姜文熙 , 赵远扬 Performance Analysis of Power Generation Systems Based on Carbon Dioxide Mixture DONG Xin , JIANG Wenxi , ZHAO Yuanyang Article Text (iFLYTEK Translation) × Close Disclaimer The English version of this article is automatically generated by iFLYTEK Translation and only for reference. We therefore are not responsible for its reasonableness, correctness and completeness, and will not bear any commercial and legal responsibilities for the relevant consequences arising from the English translation. Do not remind me again Cancel Confirm 摘要 HTML全文 图 (10) 表 (3) 参考文献 (27) 相关文章 施引文献 资源附件 (0) 摘要 摘要: 目的 近年来，CO 2 发电系统受到国内外学者广泛关注，在CO 2 中添加其他工质能够改变其热物性，进而改变热力系统的性能，文章在再压缩循环的基础上，构建了具有两级增压和再热过程的发电系统，以期为CO 2 混合工质发电系统的发展提供参考。 方法 文章建立了能量分析模型和㶲分析模型，以CO 2 分别与丙烷、乙烷、戊烷、正丁烷和异丁烷5种工质组成的以摩尔分数比例标定的二元混合工质为循环工质，分析了高压透平入口压力、循环最低温度、循环最低压力、再热压力和中间压力等关键参数对系统性能的影响规律。 结果 研究表明：通过对所有工况的分析，当循环最低压力为7 MPa，混合工质为CO 2 /Isobutane（0.93/0.07）时系统性能最佳，此时为跨临界循环，最佳热效率为50.610%，较纯CO 2 系统提升5.743%，㶲效率为74.753%，较纯CO 2 系统提升8.482%。 结论 系统在不同工况下的性能受混合工质比例影响显著，循环过程为超临界或跨临界，同时，相同工况在一定范围内变化时，最佳热效率和㶲效率呈现出固定的变化规律，丙烷、乙烷、正丁烷和异丁烷在一定比例和工况条件下能使系统获得最高的热效率和㶲效率，戊烷在多数工况下的系统性能不如其他混合工质。 Abstract: Objective In recent years, CO 2 power generation systems have garnered significant attention from researchers worldwide. Adding other working fluids to CO 2 can alter its thermal properties, thereby modifying the performance of thermal systems. Building upon the recompression cycle, this paper proposes a power generation system featuring two-stage compression and reheating processes, aiming to provide insights for the development of CO 2 mixed-working-fluid power generation systems. Method Energy analysis and exergy analysis models were established. Binary working fluids composed of CO 2 and working fluids such as propane, ethane, pentane, n-butane, and isobutane were employed as working fluids, calibrated according to their molar fraction ratios. The study investigated how key parameters, including high-pressure turbine inlet pressure, minimum cycle temperature, minimum cycle pressure, reheat pressure, and intermediate pressure, influenced system performance. Result Analysis of all operating conditions indicates optimal system performance occurs at a minimum cycle pressure of 7 MPa with a CO 2 /isobutane mixed working fluid (0.93/0.07). This configuration constitutes a transcritical cycle, achieving a maximum thermal efficiency of 50.610%. This represents a 5.743% improvement over pure CO 2 systems, The exergy efficiency reaches 74.753%, representing an 8.482% improvement over pure CO 2 systems. Conclusion The system performance under different operating conditions is significantly influenced by the proportion of mixed working fluids. The cycle process is either supercritical or transcritical. Furthermore, when identical operating conditions vary within a certain range, the optimal thermal efficiency and exergy efficiency exhibit fixed patterns of change. Propane, ethane, butane, and isobutane, at specific proportions and operating conditions, enable the system to achieve the highest thermal efficiency and exergy efficiency. Pentane generally yields inferior system performance compared to other mixed working fluids under most operating conditions. HTML全文 参考文献 (27) 相关文章 施引文献 资源附件 (0)