摘要
超临界二氧化碳布雷顿循环发电系统具有效率高、对管道腐蚀速率低、可降低电力成本等优点,被认为是钠冷快堆的理想动力转换系统。但也有不足之处,其系统正常运行时的压力较高,导致中间热交换器两侧压差大,极大地降低了安全性,限制了实际应用,因此本研究在原有系统的基础上进行改进,建立双透平发电循环,目的是在保持高循环效率的同时降低换热器冷流体侧工作压力。本研究对比了相同热功率下不同循环应用双透平发电系统的变化,并对影响效率的具体因素进行了敏感性分析。结果表明,再压缩循环最适配于钠冷快堆双透平发电系统,循环效率最高可达42.99%,其对主压缩机入口参数敏感度最高,其次是分流比和透平入口参数,而对透平分配比的敏感度最低。
The supercritical carbon dioxide Brayton cycle has advantages of high thermal efficiency,low corrosion rate to pipeline equipment and low power cost,hence it was considered as the ideal energy conversion system for sodium-cooled fast reactor.However,its high working pressure leads to large pressure difference between two sides of the heat exchanger,which limits its application.Therefore,the supercritical carbon dioxide double turbine power generation system is established to reduce system working pressure while maintaining high efficiency.The properties of different cycle configurations were compared and the sensitivity of specific parameters was analyzed.Results show that the recompression cycle is most suitable for double-turbine system and the maximum efficiency can reach 42.99%.The sensitivity of the efficiency to the main compressor inlet parameter is the highest,followed by the shunt ratio and turbine inlet parameters,the sensitivity to the turbine distribution ratio is the lowest.
作者
潘霖霖
杜海鸥
Pan Linlin;Du Haiou(China Institute of Atomic Energy,Beijing 102413,China)
出处
《核安全》
2024年第2期65-71,共7页
Nuclear Safety
