文献类型：期刊文献

中文题名：缠绕管式换热器管程的非平衡热力学研究

英文题名：Theoretical Study on Non-Equilibrium Thermodynamic Characteristics at Tube Side of Coiled-Tube Heat Exchangers

作者：韩勇[1];王学生[1];陈琴珠[1];张朝[1];袁宇阳[1]

机构：[1]华东理工大学承压系统与安全教育部重点实验室机械与动力工程学院,上海200237

年份：2018

卷号：32

期号：6

起止页码：1280

中文期刊名：高校化学工程学报

外文期刊名：Journal of Chemical Engineering of Chinese Universities

收录：CSTPCD;;EI(收录号：20190906549151);Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

语种：中文

中文关键词：缠绕管;对流传热;非平衡热力学;熵产;熵产数

外文关键词：coiled tube;convection heat transfer;non-equilibrium thermodynamics;entropy;entropy number

摘要：以描述缠绕管式换热器管程对流传热的Schmidt公式为基础,将内部流动传热的非平衡热力学模型相与Schmidt公式相结合,对缠绕管式换热器管程对流传热的非平衡热力学理论模型进行了理论研究;提出了传热熵产数(Ns,HX)和阻力熵产数(Ns,P)的概念;对缠绕管式换热器管程的Nu、ΔP、Ns,HX和Ns,P的变化规律进行了研究;结果显示,Nu随着Re的升高而升高,传热熵产数(Ns,HX)随着Re的升高而降低;ΔP和阻力熵产数(Ns,P)都随着Re的升高而增大;传热熵产数(Ns,HX)和阻力熵产数(Ns,P)能有效反映缠绕管式换热器管程对流传热过程的不可逆损失的变化规律,揭示了缠绕管式换热器管程对流传热的非平衡热力学原理。
A non-equilibrium thermodynamic model for coiled tubes was theoretically studied based on Schmidt correlation which was also correlated with non-equilibrium thermodynamic theory for internal flow.A heat transfer entropy number(Ns,HX)and a resistance entropy number(Ns,P)were proposed.Variation of Nu,ΔP,Ns,HX and Ns,P along with Re was investigated.The results show that Nu,ΔP and Ns,P increase with the increase of Re.However,Ns,HX decreases with the increase of Re.Ns,HX and Ns,P reflect the irreversible loss in the convection heat transfer process in coiled tubes,which also reveal the non-equilibrium thermodynamic mechanism of convection heat transfer in coiled-tube heat exchangers.