摘要
搭建了实验平台,通过对总传热系数和阻力降不确定度的评定,研究了影响管壳式换热器传热及流动性能实验不确定度的影响因素。研究结果表明:影响换热器总传热系数不确定度最大因素是对数平均温差,它是由温度的测量不确定度通过数学关系传递导致的结果;影响阻力降不确定度的最大因素是压力测量仪表的精度。可以为研究管壳式换热器传热及流动性能实验系统的建立和过程不确定度控制提供参考。
In this paper,the experimental platform was built,and the influencing factors of the experimental uncertainty of heat transfer and flow performance of shell and tube heat exchanger were studied by evaluating the uncertainty of total heat transfer coefficient and resistance drop.The results show that the biggest factor affecting the total heat transfer coefficient uncertainty of heat exchanger is logarithmic mean temperature difference,which is the result of temperature measurement uncertainty transferred through mathematical relationship;the biggest factor affecting the resistance drop uncertainty is the accuracy of pressure measuring instrument.It can provide a reference for the establishment of the experimental system of heat transfer and flow performance of shell and tube heat exchanger and the control of process uncertainty.
作者
胡卫朋
李盛好
李达显
梁才航
翟丽华
梁春革
吴全军
Hu Weipeng;Li Shenghao;Li Daxian;Liang Caihang;Zhai Lihua;Liang Chunge;Wu Quanjun(Guangxi Special Equipment Inspection and Research Institute Guilin Branch,Guilin 541004,China;School of Mechanical&Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Vocational&Technical College,Nanning Guangxi 530226,China)
出处
《科技通报》
2022年第4期29-34,共6页
Bulletin of Science and Technology
基金
广西自然科学基金资助项目(2018GXNSFAA281347)
广西科技基地和人才专项资助项目(桂科AD20159081)
山西省应用基础研究项目:201701D121020
广西壮族自治区市场监督管理局科技计划项目(GXKJJH2019001)
广西高校中青年教师基础能力提升项目:2021KY0986。
关键词
管壳式换热器
总传热系数
阻力降
不确定度
shell and tube heat exchanger
total heat transfer coefficient
resistance drop
experimental uncertainty
