压缩机透平分轴布置的超临界CO_(2)简单回热循环动态特性  

Dynamic Characteristics of the Supercritical CO_(2) Simple Recuperation Cycle With Compressor and Turbine Arranged in Separate Shafts

作　　者：张一帆[1] 李红智[1] 刘岗[1] 杨玉[1] 李凯伦[1] 周毓佳 雷贤良[2] ZHANG Yifan;LI Hongzhi;LIU Gang;YANG Yu;LI Kailun;ZHOU Yujia;LEI Xianliang(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,Shaanxi Province,China;State Key Laboratory of Multiphase Flow in Power Engineering(Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China)

机构地区：[1]西安热工研究院有限公司,陕西省西安市710054 [2]动力工程多相流国家重点实验室(西安交通大学),陕西省西安市710049

出　　处：《中国电机工程学报》2023年第11期4116-4126,共11页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2018YFB1501004);西安热工院科研基金项目(TA-22-TYK10)。

摘　　要：超临界CO_(2)布雷顿循环发电系统配合高温颗粒储热系统,被认为是新一代光热发电机组的重要技术路线之一。深入研究超临界CO_(2)布雷顿循环动态特性,是实现新一代光热发电机组高效、灵活设计和运行的重要基础。该文以西安热工研究院有限公司耦合颗粒换热器的超临界CO_(2)布雷顿循环机组为对象,构建了动态仿真模型,并进行动态仿真计算。该机组采用透平压缩机分轴布置的形式。结果显示:相对于颗粒/循环冷却水入口温度阶跃变化的工况,系统在颗粒/循环冷却水流量阶跃变化工况中响应更快、能够更快地达到新的稳定状态。压缩机转速扰动对系统流量影响迅速且明显,压缩机转速调节可以作为系统流量控制的重要手段。透平在不同流量下最优转速不同,当透平转速变化后更接近最优转速时机组循环净效率增高,反之降低。The supercritical CO_(2) Brayton cycle power generation system combined with high temperature particle heat storage system is considered as one of the important and potential technical directions of the new generation concentrating solar power units.The deep study on the dynamic characteristics of supercritical CO 2 Brayton cycle is an important basis for the efficient and flexible design and operation of the new generation concentrating solar power units.In this paper,a dynamic simulation model is established,tailored for the supercritical CO_(2) Brayton cycle unit coupled with a particle heat exchanger,in Xi’an Thermal Power Research Institute Co.,Ltd.In the unit,the turbine and compressor are arranged in separate shafts.Then,the dynamic simulation calculation is carried out.The results demonstrate that the system can reach a new stable state faster in the condition of particle/water mass flow rate step change than that in the condition of particle/water inlet temperature step change.The influence of compressor speed disturbance on mass flow rate is rapid and obvious.Compressor speed regulation can be used as an important means of the mass flow rate control.The optimal rotational speed of the turbine is different under different mass flow rates.When the turbine rotational speed changes closer to the optimal rotational speed,the cycle net efficiency increases.When it goes far away,the cycle net efficiency decreases.

关 键 词：超临界CO_(2) 太阳能热发电 动态仿真模型 阶跃扰动 动态特性 

分 类 号：TK121[动力工程及工程热物理—工程热物理]