权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study of Strong Interaction of Coal-Fired MHD Power Generator with CO2 Recovery as Large-Scale Concentrated Power Source

燃煤磁流体发电机与二氧化碳回收作为大型集中电源的强相互作用研究

基本信息

批准号：
15560236
负责人：
ISHIKAWA Motoo
金额：
$ 2.24万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

We have developed numerical analysis codes for the time-dependent two-and three-dimensional Navier-Stokes Equations together with the steady two-and three-dimensional Maxwell Equations with a turbulence model in order to realize a high performance MHD generator with CO2 recovery. The Navier-Stokes Equations are solved with the Harten-Yee upwind TVD method, which can capture strong shock waves and a parallel computation is used to reduce the computation time, whereas the Maxwell Equations are solved with the finite element method with linear tetrahedron elements.Results obtained by the three-dimensional analyses showed that strong oblique shock waves were induced between the nozzle and insulator in the magnetic field direction, and the shock waves propagate downwards to the exit, resulting in a large influence on the MHD generator performance, which could not be obtained with the two-dimensional analyses. It was also revealed that the shock wave induced within MHD generators had a strong relation with the electric current distribution and a large boundary layer separation was induced, resulting in a large pressure loss when the MHD generator was operated with a high current density.We also studied the interaction between the MHD generator and the AC power grid through inverter systems and found that the MHD generator could provide the electric power to the grid, and also preliminarily that introduction of forced commutated inverter systems could stabilize the AC grid by means of simultaneous control of the active and reactive power.

为了实现具有CO2回收的高性能MHD发电机，我们开发了具有时变的二维和三维Navier-Stokes方程以及具有湍流模型的稳态二维和三维Maxwell方程的数值分析代码。Navier-Stokes方程采用捕捉强激波的Harten-Yee迎风TVD法求解，并采用并行计算减少了计算时间；Maxwell方程采用线性四面体有限元法求解。三维分析结果表明，在磁场方向上，喷嘴与绝缘子之间产生强烈的斜激波，并向下传播到出口，对MHD发电机性能影响较大，这是二维分析无法得到的。研究还发现，MHD发电机内部产生的激波与电流分布有很强的关系，在高电流密度下运行时，会产生较大的边界层分离，造成较大的压力损失。我们还通过逆变系统研究了MHD发电机与交流电网的相互作用，发现MHD发电机可以为电网提供电力，并初步发现引入强制换相逆变系统可以通过同时控制有功和无功来稳定交流电网。