基于CFD的储能变流器功率单元结构和散热研究

Research on Power Unit Structure and Heat Dissipation of Energy Storage Converter Based on CFD

针对储能变流器功率单元体积小、功率密度高、运行环境条件差的特点,对该功率单元结构和散热参数进行设计和优化。采用SolidWorks进行3D建模,采用计算流体力学(CFD)有限元分析软件进行散热仿真,求得该单元在设置的结构参数和环境条件下散热器的表面温度,并将其与测试结果进行了验证,以翅片数、散热器进出风口面积、散热器材料、风机流量压力、发热功率、热管数量作为设计变量。研究结果表明:散热器翅片数量和间隙设计、风机的合理选型设计、热管的使用使功率单元的散热效率提升,体积减小,成本降低,该功率单元散热完全可满足使用要求。

In view of the small volume,high power density and poor operating environment of the power unit of the energy storage converter,the structure and heat dissipation parameters of the power unit are designed and optimized.SolidWorks is used for 3D modeling,and computational fluid dynamics(CFD)finite element analysis sofware is used for heat dissipation simulation.The surface temperature of the radiator under the set structural parameters and environmental conditions of the unit is obtained,and it is verified with the test results.The number of fins,the area of the inlet and outlet of the radiator,the material of the radiator,the flow pressure of the fans,the heating power,and the number of heat pipes are taken as the design variables.The research results show that the number and gap design of radiator fins,the reasonable type selection design of fans,and the use of heat pipes can improve the heat dissipation efficiency of the power unit,reduce the volume and cost,and the heat dissipation of the power unit can fully meet the use requirements.