Performance analysis of a quasi-counter flow parallel-plate membrane contactor used for liquid desiccant air dehumidification

被引：55
作者：
Huang, Si-Min [1 ]
Yang, Minlin [1 ]
Yang, Xiaoxi [1 ]
机构：
[1] Dongguan Univ Technol, Dept Energy & Chem Engn, Key Lab Distributed Energy Syst Guangdong Prov, Dongguan 523808, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2014年 / 63卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Performance analysis; Parallel-plate; Liquid desiccant air dehumidification; Quasi-counter; Membrane contactor; MASS-TRANSFER; EXCHANGER; MODULE; MODEL;
D O I：
10.1016/j.applthermaleng.2013.11.027
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A quasi-counter flow (combined counter/cross-flow) parallel-plate membrane contactor (QFPMC) is proposed and employed for liquid desiccant air dehumidification. The air and the liquid desiccant streams, in a quasi-counter flow arrangement, are separated by the selectively permeable membranes, which only allow the permeations of heat and water vapor while preventing other gases and liquid desiccant from permeating. A two-dimensional steady-state mathematical model is developed to study the performances in the QFPMC used for liquid desiccant air dehumidification. A finite difference method is employed to solve the equations governing momentum, heat and mass transports. The pressure drop, sensible cooling and dehumidification effectiveness are then obtained. An experimental work is conducted to validate the results. It can be found that compared to a cross-flow parallel-plate membrane contactor (CFPMC), the cooling and the dehumidification effectiveness of the QFPMC used for liquid desiccant air dehumidification are deteriorated by approximately 5-29% and 2-13%, respectively. Further, the solution channel pressure drop is increased by about 0.15-4.84 times. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：323 / 332
页数：10
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