论文成果

首页 - 论文成果

Modeling of film condensation flow in oval microchannels

摘要:A theoretical film condensation heat transfer model was developed for refrigerant flowing through oval shaped microchannels in annular flow regime with laminar liquid film flowing along the channel walls. The model considered the effects of surface tension, disjoining pressure, interfacial shear stress and interfacial thermal resistance. Study was conducted for mass fluxes in a range of 300-1500 kg/(m(2) s) with two refrigerants, R134a and R1234ze(E). The local heat transfer coefficient and circumferential mean heat transfer coefficient along the flow direction were obtained. The liquid film thickness profiles at different locations are presented. Due to the effect of surface tension, the liquid film accumulates towards the semi-circular corner. The circumferential mean heat transfer coefficient is very high after entering the channel inlet, decreases along the flow direction and reaches a constant value. R134a has a slightly higher circumferential mean heat transfer coefficient than that of R1234ze(E) due to its higher liquid conductivity. (C) 2018 Elsevier Ltd. All rights reserved.

关键字:Condensation Microchannel Theoretical modeling Refrigerant Heat transfer

ISSN号:0017-9310

卷、期、页:卷: 126 页: 1194-1205 子辑: A

发表日期:2018-11-01

影响因子:3.458000

期刊分区(SCI为中科院分区):二区

收录情况:SCIE(科学引文索引网络版)

发表期刊名称:INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

参与作者:Li, Jun Ming,Hwang, Yunho

第一作者:王吉

论文类型:期刊论文

论文概要:王吉,Li, Jun Ming,Hwang, Yunho,Modeling of film condensation flow in oval microchannels,INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2018,卷: 126 页: 1194-1205 子辑: A

论文题目:Modeling of film condensation flow in oval microchannels

分享到:
分享到
×
分享到微信朋友圈
×
Scan me!