【摘要】 为保证核电仪控系统的热稳定性和热可靠性,从机柜系统的角度出发,通过获取功能模块在机柜系统中工作时的周边环境参数,通过详细建模获取单个器件的温度情况,并对器件的温度值校核,判断器件是否满足其工作温度要求。结合长期稳定性试验对器件的温度进行监控和测量,并将分析结果同试验结果进行对比分析。研究结果表明:机柜的温度从下到上逐步降低,这是由于上层机箱距离机柜出风口较近,风压相对较低,导致上层温度相对较低。本研究中,无论是在正常工况还是事故工况下,器件的最高温均低于允许最大工作温度,但部分器件的工作温度与允许最大工作温度较接近,在散热设计过程中应当对这类器件的分布情况统筹考虑。数值模拟结果得到了较好的验证,且机柜在试验条件下能够保持长期稳定运行,监控点的温度均在器件的允许工作温度范围以内。本研究所提出的分析方法以及相应的结论可为核电仪控散热结构设计提供理论参考。更多还原

【Abstract】 To ensure the thermal stability and reliability of instrumental control system of nuclear power plant,numerical simulation is performed in this work from the aspect of cabinet system. After obtaining the environmental parameters of each module,the temperature distribution situation of each electron device is obtained accordingly. In addition,experimental test is performed to verify the numerical results. The results show that the temperature of the cabinet gradually decreases from the bottom to the top,this is because that the upper shelf is close the air outlet of the cabinet,and the air pressure is relative low. Regardless of the normal working condition or the accident working condition,the maximum temperature of the device is lower than the allowable operating temperature of the device. However,the operating temperature of some devices is close to the maximum allowable operating temperature,so the distribution of these devices should be considered in the design of structure heat dissipation. The test results can well verify the simulation results,and the test results indicate that the instrumental control system can maintain stable operation under experimental conditions,the temperatures of all the observation points is kept in the safety range. The analysis method and corresponding conclusions presented in this work can provide the theoretical reference for the structure design of instrumental control system of nuclear power plant.更多还原