基于轴向预热器的蒸汽发生器强化传热研究  

Study on Heat Transfer Enhancement of Steam Generator Based on Axial Economizer

作　　者：吴杨[1] 李冬慧[1] 李鹏飞[1] 成翔[1] WU Yang;LI Dong-hui;LI Peng-fei;CHENG Xiang(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu of Sichuan Prov.610041,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,四川成都610041

出　　处：《核科学与工程》2018年第6期928-934,共7页Nuclear Science and Engineering

摘　　要：本文基于轴向预热器对蒸汽发生器(SG)的强化传热效果以及强化传热机理进行了系统地分析研究。研究结果表明,在相同的热负荷下,加装轴向预热器后,蒸汽压力提高了接近4.3%。若原型SG单纯靠增加传热面积来达到此效果,需要增加29.6%的传热面积。轴向预热器对自然循环SG的强化传热效果明显。另外,为深入探明加装轴向预热器的强化传热机理,对原型SG以及加装轴向预热器的SG在对称面上的空泡份额、不同高度截面上的空泡份额、对称面上的焓值分布、不同高度截面上的焓值分布、二次侧的流线分布进行了系统地比较分析研究。上述研究结果将为基于轴向预热器的自然循环SG设计奠定良好的理论基础。Heat transfer enhancement of steam generator(SG),based on axial economizer,is systematically studied.The results indicate that steam pressure for SG with axial economizer increases nearly 4.3%compared with SG without axial economizer.For SG without axial economizer,heat exchange area should increase more than 29.6%to attain the same steam pressure.The effect of axial economizer on heat transfer enhancement of SG is remarkable.Furthermore,to ascertain the heat transfer enhancement mechanisms of axial economizer for SG in-depth,comparative analysis between archetypal SG and SG with axial economizer towards void fraction,enthalpy distribution,flow field at different directions are systematically studied.The results in this paper are guidance to SG design based on axial economizer.

关 键 词：蒸汽发生器 轴向预热器 强化传热 热工水力 

分 类 号：TL48[核科学技术—核技术及应用]