池式低温供热堆非能动余热排出系统单相自然循环流动与传热实验研究  

Experimental Study on Single-phase Natural Circulation Flow and Heat Transfer of Passive Residual Heat Removal System of Swimming Pool-type Low-temperature Heating Reactor

作　　者：徐浚修 范广铭[1,2] 侯明文 丁铭 岳芷廷[3] 阎昌琪 XU Junxiu;FAN Guangming;HOU Mingwen;DING Ming;YUE Zhiting;YAN Changqi(College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China;Fundamental Science on Nuclear Safety and Simulation Technology Laboratory,Harbin 150001,China;Reactor Engineering Technology Research Institute,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001 [2]核动力装置性能与设备黑龙江省重点实验室,黑龙江哈尔滨150001 [3]中国原子能科学研究院反应堆工程技术研究所,北京102413

出　　处：《原子能科学技术》2022年第11期2438-2449,共12页Atomic Energy Science and Technology

摘　　要：针对池式低温供热堆低压低温的特点,采用H2TS(hierarchical two-tiered scaling)比例分析方法设计了池式低温供热堆非能动余热排出系统的单相自然循环实验系统,并开展了非能动余热排出系统单相自然循环的流动与传热特性的实验研究。研究结果表明,通过H2TS比例分析方法设计的实验系统能达到设计的排热功率,冷热源之间的温差为54℃,此方法适用于低温差下的单相自然循环系统的设计。系统在启动过程中存在流量振荡,随着系统的运行能逐渐稳定。边界温度主要影响系统的换热功率和达到稳定的时间。对于非能动余热排出系统池水换热器管束的这种既不是定热流也不是定壁温边界,采用对流传热温差作为Gr的参数更为合适。根据实验数据拟合得到适用范围为RaD D/L<2.34×10^(4)的管束外自然对流传热关联式,其误差范围在-17%~15%之内。本研究得到的无量纲相似准则集团和实验研究结果可为工程设计提供依据和数据基础。The swimming pool-type low-temperature heating reactor(SPLTHR)has low thermal parameters,large heat capacity,and high inherent safety,so it is a suitable reactor type for nuclear heating reactors.Because the SPLTHR has a long shutdown time and the temperature difference between the cold and heat sources is small,it has certain requirements on the heat transfer capability of the passive residual heat removal system(PRHRS).Basing on the characteristics of SPLTHR,a single-phase natural circulation experiment system of PRHRS of SPLTHR was designed by H2 TS(hierarchical two-tiered scaling)proportion analysis method,and the flow and heat transfer characteristics of the single-phase natural circulation of the PRHRS were studied experimentally.In order to get closer to the prototype system,the center height difference of the cold and heat source of the experimental system was the same as that of the prototype system,which was 9 m.The ranges of the pool water temperature,air temperature and air flow rate in the experiment were 50-90℃,15-30℃and 15000-35000 m~3/h,respectively.The results show that the experimental system designed by H2 TS proportion analysis method can achieve the designed heat transfer capacity when the temperature difference between the cold and heat source is 54℃,which means the method is suitable for the design of single-phase natural circulation system under low temperature difference.There is flow oscillation in the system start-up process,and the system can be stabilized gradually with the operation.The hot and cold water in the primary loop alternately enters the heat exchanger and air-cooler,causing the driving force of the system to change,which leads to fluctuations in circulation flow rate and heat transfer capacity.The change of boundary conditions mainly affects the heat transfer capacity of the system and the time to reach stability,but has little effect on the shape and number of fluctuations before the system reaches stability.For the PRHRS heat exchanger tube bundle,which is neither

关 键 词：单相自然循环 自然对流 比例分析 池式低温供热堆 低温差 

分 类 号：TL334[核科学技术—核技术及应用]