基于热管技术的PRS水池自然对流传热特性分析  

Analysis of natural convection heat transfer characteristics of PRS pool based on heat pipe technology

作　　者：乔珂 陶汉中 李艳南 QIAO Ke;TAO Han-zhong;LI Yan-nan(School of Energy Science and Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学能源科学与工程学院,江苏南京211816

出　　处：《能源工程》2022年第5期22-27,39,共7页Energy Engineering

摘　　要：为了提高二次侧被动余热排出系统(PRS)的冷却能力,使其不再局限于72小时安全时间,提出了一种基于分离式热管技术的PRS水池长期冷却方案,并通过数值方法研究了72小时内采用分离式热管的PRS水池的自然对流特性、管束的瞬态传热特性以及布置方式的影响。研究表明:在热负荷15 MW下,水池内的平均水温在启动初期会出现短暂的峰值,稳定后该非能动冷却系统可成功带走池内衰变热并保证池内平均温度维持在361.67 K;在启动过程中,首排蒸发管最大传热功率与稳定时相差了51.2%,稳定时所有蒸发管最大传热功率差距为27.8%;当蒸发管束布置在外弧面附近时,总传热功率最大且管束间的传热差距最小。In this paper,a long-term cooling scheme based on separated heat pipe technology is proposed to elevate the cooling performance of the passive residual heat removal system(PRS)on the secondary side beyond safety time of 72 hours.Numerical methods are used to study the natural convection characteristics of PRS pool within 72 hours,the transient heat transfer characteristics of tube bundle and the influence of tube bundle arrangement.Results showed that a short-term peak of pool water temperature at the initial stage of startup was present.The passive cooling system can successfully remove the decay heat and maintain the average temperature of pool at 361.67 K.The maximum surplus of the heat transfer power of first row evaporating tubes reached 51.2%of stable power,and the maximum difference of heat transfer power among all evaporating tubes reached 27.8%of stable power.When evaporation tube bundle is arranged near the outer arc surface,the total heat transfer power is maximum and the heat transfer gap between the tube bundles is minimum.

关 键 词：HPR1000 分离式热管换热器 非稳态数值模拟 自然对流 

分 类 号：TK124[动力工程及工程热物理—工程热物理]