自然循环参数稳态变化计算研究
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摘要
稳态下自然循环各参数对于提高自然循环能力有着重要的作用。研究稳态情况下,自然循环流量等参数的变化规律。在给定相关参数的基础上,通过改变冷却段出口温度调整有效压头,并在更新相关的物性参数值后,分析不同参数下自然循环流量、各压头、冷却段冷却功率的变化规律。结果表明:冷却段出口冷却剂密度及比焓,随冷却段出口冷却剂温度增加而逐渐增加;加热段功率增加会引起自然循环流量增加。所得结果为提高自然循环能力及进一步研究提供参考。
The parameters of natural circulation in steady state play an important role in improving the capacity of natural circulation. The change law of natural circulation flow and other parameters in steady state are studied. Given related parameters,the effective pressure head can be adjusted by changing the outlet temperature of the cooling section. After updating the related physical property parameters,the change laws of natural circulation flow rate,pressure head and cooling power of the each cooling section under different parameters are analyzed. The results show the coolant density and specific enthalpy at the outlet of cooling section increase gradually with the increase of the coolant temperature at the outlet of cooling section. The increase of power in heating section will cause the increase of natural circulation flow rate. The results provide reference for improving the natural circulation capacity and further research.
The parameters of natural circulation in steady state play an important role in improving the capacity of natural circulation. The change law of natural circulation flow and other parameters in steady state are studied. Given related parameters,the effective pressure head can be adjusted by changing the outlet temperature of the cooling section. After updating the related physical property parameters,the change laws of natural circulation flow rate,pressure head and cooling power of the each cooling section under different parameters are analyzed. The results show the coolant density and specific enthalpy at the outlet of cooling section increase gradually with the increase of the coolant temperature at the outlet of cooling section. The increase of power in heating section will cause the increase of natural circulation flow rate. The results provide reference for improving the natural circulation capacity and further research.
引文
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[2]孙艳,魏峰.自然循环蒸发器内流动和传热的数值模拟研究[J].流体机械,2012,40(9):76-78.
[3]宫厚军,杨星团,姜胜耀,等,运动条件下反应堆自然循环模型[J].清华大学学报(自然科学版),2013,53(4):432-436.
[4]刘福国,何传怀.自然循环汽包炉蒸发回路稳态数学模型[J].中国电机工程学报,2014,34(32):5709-5716.
[5]路璐,郑利民. AP1000核电厂反应堆冷却剂系统泄漏分析[J].核技术,2016,39(9):94-98.
[6]陈娟,周涛,齐实,等.矩形通道自然循环流动不稳定性实验研究[J].核动力工程,2017,38(2):51-55.
[7]MA D,ZHOU T,LI B,et al. An improved correlation on the onset of heat transfer deterioration in supercritical water[J].Nuclear Engineering&Design,2018(326):290-300.
[8]汪振,王刚,辜峙钘,等.加速器驱动铅铋冷却自然循环次临界堆束流瞬变事故研究[J].核技术,2015,38(1):93-98.
[9]PARK R J,HA K S,KIM S B,et al. Analysis of two phase natural circulation flow between the outer reactor vessel and insulation under IVR-ERVC condition[C]. Emeishan:The Fifth China-Korea Workshop on Nuclear Reactor Thermal Hydraulics,2011.
[10]ZHOU T,Y R C,LI Z Y,et al. Onset of nucleate boiling in natural circulation systems predicted using the second stir theory[J]. Tsinghua Science and Technology,2010,15(4)81-86.
[11]LIAO Y X,DIRK LUCAS,ECJHARD KREPPER,et al.Flashing evaporation under different pressure levels[J].Nuclear Engineering and Design,2013(265):801-803.
[12]霍启军,周涛,李云博,等.铅铋合金自然循环稳定流动的析因分析[J].核技术,2015,38(3):89-92.