Fluid flow and heat mass transfer in membrane parallel-plates channels used for liquid desiccant air dehumidification
Fluid flow and heat mass transfer in membrane parallel-plates channels used for liquid desiccant air dehumidification
复制标题
用于液体干燥剂空气除湿的膜平行板通道中的流体流动和热质传递
DOI：
10.1016/j.ijheatmasstransfer.2012.01.003
复制
发表时间：
2012-04-01
影响因子：
5.2
通讯作者：
Pei, Li-Xia
中科院分区：
文献类型：
--
作者：
Huang, Si-Min;Zhang, Li-Zhi;Pei, Li-Xia
本文研究了平板通道内的流体流动和对流传热传质。膜形成的通道用于液体干燥剂空气干燥。液体干燥剂和空气流由半透膜分离以防止液滴跨越。这两种流在交叉流动布置中通过膜交换热量和水分，该膜仅选择性地允许水蒸气和热量的输送。假设这两种流动在热发展和浓度发展时流体动力学充分发展。与传统的假定温度（浓度）或热通量（质量通量）均匀的边界条件不同，本文通过同时求解两种流体的动量、能量和浓度方程，得到了膜表面的真实的边界条件。然后在膜表面上耦合方程。自然形成的边界条件，然后用于计算本地和平均努塞尔和舍伍德数沿着渠道。实验工作进行验证的结果。公开了与传统的金属形成的平行板通道相比的通道的不同特征。(C)2012爱思唯尔有限公司保留所有权利。
Fluid flow and convective heat mass transfer in membrane-formed parallel-plates channels are investigated. The membrane-formed channels are used for liquid desiccant air dehumidification. The liquid desiccant and the air stream are separated by the semi-permeable membrane to prevent liquid droplets from crossing over. The two streams, in a cross-flow arrangement, exchange heat and moisture through the membrane, which only selectively permits the transport of water vapor and heat. The two flows are assumed hydrodynamically fully developed while developing thermally and in concentration. Different from traditional method of assuming a uniform temperature (concentration) or a uniform heat flux (mass flux) boundary condition, the real boundary conditions on membrane surfaces are numerically obtained by simultaneous solution of momentum, energy and concentration equations for the two fluids. Equations are then coupled on membrane surfaces. The naturally formed boundary conditions are then used to calculate the local and mean Nusselt and Sherwood numbers along the channels. Experimental work is performed to validate the results. The different features of the channels in comparison to traditional metal-formed parallel-plates channels are disclosed. (C) 2012 Elsevier Ltd. All rights reserved.