【作者】 关膺；

【导师】 程友良；

【作者基本信息】 华北电力大学（河北） ， 流体机械及工程， 2008， 硕士

【摘要】 对于采用自然水面直流冷却的电厂,其取水口和排水口需合理布置,以期达到好的冷却效果。本文研究电厂冷却水取排水布置问题,重点是差位式布置方案及其比较。首先从理论上阐述了电厂取排水的基本原则,并分析了差位式、分列式和重叠式这三种主要取排水方式,接着用计算流体力学软件CFD对若干水域的差位式布置方式进行研究,得到差位式布置特性和一系列取水温升随参数的变化规律并分析了其中的原因。最后通过对差位式与分列式和重叠式的取水温升的对比,得出在特定水域差位式优于分列式和重叠式的结论。更多还原

【Abstract】 For the power plants that adopt once-through cooling water system drawing cooling water from natural water space, it is important to arrange the inlet and the outlet for good cooling effect. In this paper, the cooling water projects in the power plants, especially differential method and its comparison with other methods, are investigated. The basic design principles of the cooling water intake-outlet methods are first presented theoretically, and some intake-outlet methods such as differential method, march-past method and eclipsed form method are analyzed. Then, the flowing characteristics of differential arrangement in some water area are analyzed and the effects of some main factors on inlet temperature are investigated. The laws of the inlet temperature varying with the parameters are obtained and the reasons for them are discussed. Finally, by comparing the inlet temperature of march-past method and the eclipsed form with that of differential method, the superiority of the latter are analyzed.更多还原