出口高度对非能动安全壳冷却系统影响

发布时间：2018-04-21 10:18

本文选题：非能动安全壳 + 狭长空间　；参考：《强激光与粒子束》2015年12期

【摘要】：对某大型核反应堆非能动安全壳冷却系统(PCS)中安全壳外部的热环境进行了研究。建立了安全壳外部狭长空间的自然对流换热计算模型,基于Navier-Stokes(N-S)方程进行了求解,同时研究了安全壳出口高度对非能动安全壳冷却系统冷却性能的影响规律。结果表明:在标准大气压下、进口空气温度308.15K时,基准型安全壳按面积加权的出口平均温度为330.33K,引射的冷却空气质量流量为275.85kg/s,冷却空气带走的热量为6160kW;随着安全壳出口高度的增加,安全壳出口质量流量、换热量不断增加,但变化曲线斜率不断降低,最后趋于平缓,同时,衡量冷却空气有效冷却能力的温度效率线性降低,流动损失线性增大,兼顾换热量与流动损失存在一个最优解。
[Abstract]:The thermal environment outside the containment in the passive containment cooling system (PCS) of a large nuclear reactor was studied. The natural convection heat transfer model of outer narrow space of containment is established and solved based on Navier-Stokes-N-S equation. The influence of shell outlet height on cooling performance of inactive containment cooling system is studied. The results show that under the standard atmospheric pressure, the inlet air temperature is 308.15K, The average outlet temperature weighted by area of the base containment is 330.33K, the mass flow of ejected cooling air is 275.85 kg / s, and the heat taken away by cooling air is 6160 kW. With the increase of the height of containment outlet, the mass flow rate and heat exchange of containment outlet increase continuously. However, the slope of the changing curve decreases continuously, and finally tends to be gentle. At the same time, the temperature efficiency of measuring the effective cooling capacity of cooling air decreases linearly, the flow loss increases linearly, and there is an optimal solution for both heat transfer and flow loss.
【作者单位】：北京航空航天大学能源与动力工程学院;
【分类号】：TL364.3

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