摘要
管外含空气蒸汽冷凝是非能动安全壳热量导出系统工作的重要环节,为了提高系统的传热效率需要对空气-蒸汽冷凝强化传热进行研究。本文在压力0.2~1.3 MPa,壁面过冷度50~120℃,对管外径为19、25、38 mm的螺旋管外含空气蒸汽冷凝进行了实验研究。实验结果表明:螺旋管管径越小,换热系数越大,19 mm管的换热效果可达38 mm管的1.55倍;与竖直管相比,螺旋管强化换热效果受压力影响较大,压力越高,强化换热效果越好,0.2 MPa时换热系数较竖直管低3%左右,而1.3 MPa时比竖直管可强化65%左右。螺旋管有较好的强化换热效果,可对非能动安全壳热量导出系统的优化设计提供支持。
Air-steam condensation outside the tube is a crucial part of passive containment heat removal systems.Air-steam condensation-enhanced heat transfer must be investigated to enhance the heat transfer efficiency of the system.The condensation of air-containing steam outside the helically-coiled tubes with diameters of 19,25,and 38 mm was experimentally investigated in this study at pressures of 0.2~1.3 MPa and wall subcooling of 50~120℃.Results reveal that the heat transfer coefficient increases as a consequence of a reduction in the diameter of the helically-coiled tube,and the heat transfer effect of the 19 mm tube is 1.55 times that of the 38 mm tube.Compared with a vertical tube,the heat transfer enhancement effect of the helically-coiled tube is markedly affected by pressure;high pressure improves the heat transfer enhancement effect.The heat transfer coefficient at 0.2 MPa is approximately 3%lower than that of a vertical tube,while that at 1.3 MPa is approximately 65%stronger than that of the vertical tube.The spiral tube has a substantially enhanced heat transfer effect,which can support the optimization design of the subsequent passive containment heat removal system.
作者
李文涛
边浩志
代丽红
周书航
吴桐雨
丁铭
LI Wentao;BIAN Haozhi;DAI Lihong;ZHOU Shuhang;WU Tongyu;DING Ming(College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Heilongjiang Provincial Key Laboratory of Nuclear Power System&Equipment,Harbin Engineering University,Harbin 150001,China;China Ship Development and Design Center,Wuhan 430064,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2023年第7期1208-1213,共6页
Journal of Harbin Engineering University
基金
安全壳热工水力联合实验室基金项目(KY21019).
关键词
含空气蒸汽冷凝
冷凝
螺旋管
强化传热
非能动安全壳热量导出系统
传热
实验
安全壳
steam condensation comprising air
condensation
helically-coiled tube
heat transfer enhancement
passive containment heat removal system
heat transfer
experiment
containment
