文档介绍：摘要
本文首先对蒸汽发生器的形式进行了选择,经过对比,将自然循环形式的蒸汽发生器作为本次设计的主体。接着通过已给定的原始数据、进行传热计算、并恰当的选择传热管内外径和最后确定k值并计算出传热面积。然后通过蒸汽产量和传热管内径,确定了传热管根数。接下来进行传热管结构设计,本次设计使用的是正方形排布,因为管束较多,根据经验应该排布为圆形,传热管之间的距离唯一。根据排管结束后可以得出的蒸汽发生器和U型管的相关尺寸数据,进行了水力计算其中包括一回路的U形管内摩擦阻力计算、一回路水局部阻力计算;二回路的下降空间阻力计算、上升空间阻力计算;选取适当的汽水分离器阻力。从而得出循环总阻力然后确定预热段高度并进行运动压头的计算,然后通过画图得出最佳循环倍率。
关键词自然循环蒸汽发生器,三角形布置,结构设计
Abstract
First, the choice of the steam generator in the form of the design choices, parison, the natural circulation steam generator. Subsequently endorsed by the original data, heat transfer calculations, select the appropriate heat transfer tube outer diameter and determine the fixed value of k to calculate the heat transfer area. Steam production and heat transfer tube diameter, to determine the heat transfer tubes of the root number. Next, we should do structural design with heat transfer tubes。In this design,we used square layout。Because the number of heat transfer tubes is very we have to arranged them in a circular based on experience .And the distance between heat transfer tubes is only. According to the steam generator can be drawn after the end of the pipe and U-tube size data, the hydraulic calculation of the U-shaped tube including a loop within the frictional resistance, the local resistance of a circuit water; falling space of two loop resistance calculation of room for growth resistance calculation; select the appropriate soda separator resistance. To arrive at the total loop resistance and then determine the preheating section height and movement of pressure head calculation, and then obtained by drawing the best circulation ratio.
Key word Natural circulation steam generator, Square layout, Structural design
目录
摘要 I
Abstract II
第一章绪论 1
1
1
3
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3
第二章蒸汽发生器传热管的设计方法 4
传热系数k值得选取 4
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第三章蒸汽发生器结构设计 9
给定条件 9
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