摘要
建立了再压缩S-CO_(2)布雷顿循环模型,对S-CO_(2)再压缩布雷顿循环的塔式太阳能光热系统的镜场效率、吸热塔效率、冷源损失等指标进行模拟以及对分流比、压比、透平入口温度等参数进行研究,同时计算得出储热所需时长随全年各月的变化曲线。通过时间序列,得出两分两至日镜场系统与储热系统的供能情况。模拟结果表明:镜场遮挡效率和余弦效率随塔高的增加而增大,大气衰减效率和截断效率随塔高增加而减小;储热时长随日均辐射总量和日照时长有明显的季节差异,春秋分以及夏至日储热系统可以保证系统在无光照情况下实现满发,但冬至日储热系统无法蓄满热,则要想使系统持续运行,则夜里发电功率仅为17.34MW。最后根据压比(2~3.6)、分流比、透平入口温度(500℃~800℃)对于系统循环效率的影响曲线,计算得出系统的参数优化值。
The model of S-CO_(2) recompression Brayton cycle is established.The mirror field efficiency,absorber efficiency,cold source loss and other indicators of the tower solar photovoltaic system of S-CO_(2) recompression Brayton cycle are simulated,and the parameters such as shunt ratio,pressure ratio and turbine inlet temperature are studied.At the same time,the curve of heat storage time required with each month of the year is calculated.Through the time series,the two indexes are obtained It is divided into two parts:solar mirror field system and heat storage system.The simulation results show that:the shielding efficiency and cosine efficiency of the mirror field increase with the increase of tower height,and the atmospheric attenuation efficiency and truncation efficiency decrease with the increase of tower height;the heat storage duration has obvious seasonal differences with the daily average radiation and sunshine duration,and the thermal storage system on the spring and autumn equinox and the summer solstice can ensure that the system can achieve full output without light,but the thermal storage system on the winter solstice can not store full heat In order to keep the system running continuously,the generating power at night is only 17.34MW.Finally,according to the influence curves of pressure ratio(2~3.6),split ratio and turbine inlet temperature(500℃~800℃)on the system cycle efficiency,the optimized values of system parameters are calculated.
作者
王智
闫锐鸣
刘亚丽
张玲
陶鸿俊
WANG Zhi;YAN Rui-ming;LIU Ya-li;ZHANG Ling;TAO Hong-jun(Department of Power Engineering,North China Electric Power University,Baoding 071000,China)
出处
《汽轮机技术》
北大核心
2021年第6期422-426,共5页
Turbine Technology
基金
国家自然科学基金资助项目(51306059)。
