摘要
高温钠热管作为一种高效的换热装置,在导热性、等温性以及非能动特性方面具有显著的优点。将高温钠热管应用到新概念熔盐堆非能动余热排出系统中具有重要的研究意义。本工作通过数值方法研究了高温钠热管在熔盐堆事故工况下的瞬态运行特性。钠热管的物理模型主要包括管壁、吸液芯及蒸汽区3个耦合传热区域。通过对上述3个区域建立合理的数学模型并采用有限元的方法,利用FORTRAN进行编程,最终得到高温钠热管启动过程中的温度、速度、压力分布。结果表明:熔盐堆事故状态下,钠热管从启动到稳态过程中其运行特性良好且具有很高的传热效率。
The high temperature Na heat pipe is an effective device for transporting heat, which is characterized by remarkable advantages in conductivity, isothermality and passively working. The application of Na heat pipe on passive heat removal system of new concept molten salt reactor （MSR） is significant. The transient performance of high temperature Na heat pipe was simulated by numerical method under the MSR accident. The model of the Na heat pipe was composed of three conjugate heat transfer zones, i.e. the vapor, wick and wall. Based on finite element method, the governing equations were solved by making use of FORTRAN to acquire the profiles of the temperature, velocity and pressure for the heat pipe transient operation. The results show that the high temperature Na heat pipe has a good performance on operating characteristics and high heat transfer efficiency from the frozen state.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2013年第12期2254-2260,共7页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(91026023
10575079)
关键词
熔盐堆
非能动余热排出系统
钠热管
瞬态模拟
molten salt reactor
passive heat removal system
Na heat pipe
transientsimulation
