MW级超临界二氧化碳发电系统中主压缩机首级设计及其入口凝结性能分析  

Design and condensation performance analysis on the first stage of main compressor in MW-level supercritical carbon dioxide power generation system

作　　者：徐骏 巢栩嘉 范世望 王彤[1] XU Jun;CHAO Xujia;FAN Shiwang;WANG Tong(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Steam Turbine Works Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]上海汽轮机厂有限公司,上海200240

出　　处：《热力发电》2020年第10期180-188,共9页Thermal Power Generation

摘　　要：为实现MW级超临界二氧化碳布雷顿循环发电系统的开发,由气体动力学参数分析得到主压缩机的适宜进口参数范围。结合超临界二氧化碳强烈非线性的实际物性,引入叶轮内损失模型,改进热力设计得到主压缩机第1级叶轮模型。采用数值模拟方法,分析所设计叶轮的流场,对比不同进口参数下,叶轮进口流动凝结对压缩机性能的影响。结果发现:对于不同进口总温和总压,温度对气流凝结的影响更大。为得到较接近临界参数的工作点,可在本文工作基础上对叶轮进行优化设计。In order to realize the development of MW-level supercritical carbon dioxide(S-CO2)Brayton cycle power generation system,the suitable inlet state parameters range for the main compressor is obtained by analyzing the gas dynamic parameters.Combined with the actual nonlinear physical properties of supercritical carbon dioxide,the loss models in the impeller were introduced,and the thermodynamic design was improved to obtain the impeller model of the first stage in the main compressor.By using the numerical simulation method,the flow field of the designed impeller was analyzed,and the influence of the inlet flow condensation in the impeller on the performance with different inlet parameters was compared.It was found that the temperature had a greater effect on condensation at different inlet total temperatures and total pressures.In order to get the working point closer to the critical parameter,the impeller can be optimized and designed based on the work in this paper.

关 键 词：超临界二氧化碳 压缩机 热力设计 实际物性 损失模型 数值计算 气流凝结特性 

分 类 号：TK474.8[动力工程及工程热物理—动力机械及工程]