摘要
本文采用分布参数法对1000 W@2 K低温系统配套的50 g/s流量2 K换热器进行了设计计算。利用加权系数法提出了换热器综合优化指标,随后采用遗传算法进行优化,并根据工程需要从多个侧重点对换热器进行优化,获得了一系列优化方案,从中选择了侧重换热效率的方案作为初步设计结果。在该结果的基础上,进一步采用了CFD数值仿真校核,验证了初步设计结果的准确性。优化后换热器的换热效率为84.4%,压降为222.16 Pa,体积为0.0221 m^(3)。
The 2 K cryogenic system is a key subsystem of the new generation superconducting accelerator,and the 2 K heat exchanger is the key equipment.With the increasing scale of 2 K cryogenic system,the demand for high-flow 2 K heat exchanger becomes more and more urgent,and the current application of the tube and fin type,coil and tube structure of the heat exchanger is gradually replaced by a more efficient and compact plate-fin heat exchanger in high flow conditions,but the plate-fin heat exchanger has more structural parameters,and it is difficult to take into account the heat transfer efficiency,pressure drop and volume size in the design process.In this paper,based on the basic differential equations of heat transfer and pressure drop and the related flow heat transfer correlation equation,the design calculation of a 50 g/s flow rate 2 K heat exchanger supporting a 1000 W@2 K cryogenic system was carried out using the distributed parameter method.Five parameters affecting the performance of the heat exchanger were analyzed and the comprehensive optimization index of the heat exchanger was proposed using the weighting coefficient method.Based on the proposed optimization indexes,a genetic algorithm was used to optimize the heat exchanger with multiple foci on high heat transfer efficiency,low pressure drop and small size according to the engineering needs,and a series of optimization solutions were obtained,from which the solution focusing on heat transfer efficiency was selected as the preliminary design result.Based on the parameter of this result,a three-dimensional model of the heat exchanger heat transfer channel was established,and CFD numerical simulation was used for simulation calculation.The simulation results were in good agreement with the design results,verifying the accuracy of the preliminary design results,and the performance of the heat exchanger under different operating conditions was analyzed for this optimization result.The optimization result shows that the heat exchanger is selected with perf
作者
朱柯宇
常正则
李梅
李少鹏
孙良瑞
桑民敬
叶瑞
周健荣
潘卫民
葛锐
ZHU Keyu;CHANG Zhengze;LI Mei;LI Shaopeng;SUN Liangrui;SANG Minjing;YE Rui;ZHOU Jianrong;PAN Weimin;GE Rui(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2022年第10期2146-2154,共9页
Atomic Energy Science and Technology
基金
国家自然科学基金面上项目(12175250)
中国科学院2021年度技术支撑人才项目。
关键词
低温系统
板翅式换热器
分布参数法
遗传算法
数值模拟
cryogenic system
plate-fin heat exchanger
distributed parameter method
genetic algorithm
numerical simulation
