一种新的对流换热系数分离法  

A New Separation Method of Convective Heat Transfer Coefficient

作　　者：沈亚杰 高永恒 刘臻 詹勇杰 王澄瀚 杨嗣 王勇智 邓云李 SHEN Ya-jie;GAO Yong-heng;LIU Zhen;ZHAN Yong-jie;WANG Cheng-han;YANG Si;WANG Yong-zhi;DENG Yun-li(Nuclear Power Operations Management Co,Ltd,CNNP,Haiyan,Zhejiang Prov.314300,China;Nuclear Power Institute of China,Chengdu,Sichuan Prov.610005,China)

机构地区：[1]中核核电运行管理有限公司,浙江海盐314300 [2]中国核动力研究设计院一所,四川成都610005

出　　处：《中国核电》2022年第2期200-203,共4页China Nuclear Power

摘　　要：在核电厂中,新型结构的换热器被应用地越来越广泛,而现有的绝大多数的对流换热系数的分离法难以适用于这些新型结构换热器中。为此,提出了一种新的分离法——线性约束法。该方法用同组数据作差的方法将多组实验数据相结合,并以线性相关性作为约束条件,进行对流换热系数的分离。对于粘度随温度变化的流体需加入粘度修正项。该方法能适用于两侧换热系数与雷诺数的方次关系都未知的情况;可采用多组实验数据,可信度高;拟合后误差小,一般条件下误差能控制在5%以内。Heat exchangers with new type of structure are used more and more widely in nuclear power plants,but most existing separation processes of convective heat transfer coefficient are difficult to apply to them.In order to solve this problem,a new separation process-difference separation process is proposed.This approach combines multiple sets of experimental data by group data method,using linear correlation as the constraint conditions,to separate the convective heat transfer coefficient.And for the fluid that is sensitive to the change of temperature,viscosity correction should be added.It can be applied in the situation of unknown two side heat transfer coefficient and Reynolds number of square time relationship and has the advantages of high credibility by employing several groups of experimental data and small after-fitting error which could be controlled within 5%.

关 键 词：换热器 对流换热系数 粘度修正 

分 类 号：TL67[核科学技术—核技术及应用]