Conjugate heat and mass transfer in a cross-flow hollow fiber membrane bundle used for seawater desalination considering air side turbulence
Conjugate heat and mass transfer in a cross-flow hollow fiber membrane bundle used for seawater desalination considering air side turbulence
复制标题
考虑空气侧湍流的海水淡化错流中空纤维膜束中的共轭传热传质
DOI：
10.1016/j.memsci.2017.03.051
复制
发表时间：
2017-07
影响因子：
9.5
通讯作者：
Zhang Li-Zhi
中科院分区：
文献类型：
--
作者：
Li Guo-Pei;Zhang Li-Zhi
对膜法海水淡化系统中的关键过程--空气增湿中空纤维膜束内的流动和传热传质进行了研究。MBH就像一个交叉流管壳式热交换器，其中加热的海水在纤维内部流动，而工艺空气流流过纤维束。考虑到空气侧湍流，即使雷诺数低至50时也存在的管束中的流体流动和传热传质进行了研究。空气侧、水侧和膜侧传递方程以共轭方式一起求解。采用标准k-ε湍流模型（STDk-ε）和低雷诺数k-ε湍流模型（LowRek-ε）对湍流动能及其耗散率进行了预测。为了验证数值结果并比较不同湍流模型的性能，设计并构建了基于膜的空气增湿-脱盐（MHDD）系统以帮助调查。分析了填充系数、雷诺数以及纤维的横向和纵向间距对气流和水流的平均努塞尔数、舍伍德数和摩擦系数的影响。回归了性能分析的相关性。
Fluid flow and heat and mass transfer in a hollow fiber membrane bundle for air humidification (MBH), which is the key process of a membrane desalination system, are investigated. The MBH is like a cross-flow shell-and-tube heat exchanger where heated seawater flows inside the fibers and the process air stream flows across the fiber bundle. Fluid flow and heat and mass transfer in the bundle are studied by considering the air side turbulence which exists even when the Reynolds numbers are as low as 50. Air side, water side and membrane side transfer equations are solved together in a conjugated way. Two turbulence models namely the standardk-εmodel (STDk-ε) and the low-Reynolds-numberk-εmodel (LowRe k-ε) are adopted for the prediction of turbulent kinetic energy and its dissipation rate. In order to validate the numerical results and to compare the performance of the different turbulence models, a membrane-based air humidification-dehumidification desalination (MHDD) system is designed and constructed to aid the investigation. Effects of module packing fractions and Reynolds numbers as well as the transverse and longitudinal pitches of the fibers on the mean Nusselt, Sherwood numbers and friction factors for air flow and water flow are analyzed. Correlations for performance analysis are regressed.
登录
查看更多内容
DOI：
10.1016/0016-0032(51)91075-7
发表时间：
2007
期刊：
--
影响因子：
--
作者：
P. Lettieri;T. Elson
通讯作者：
P. Lettieri;T. Elson
影响因子：
56.9
作者：
Vörösmarty, CJ;Green, P;Lammers, RB
通讯作者：
Lammers, RB
DOI：
10.1007/978-1-4419-1564-1_7
发表时间：
2010
期刊：
--
影响因子：
--
作者：
Herbert Oertel
通讯作者：
Herbert Oertel
DOI：
10.1016/j.ijheatmasstransfer.2006.06.025
发表时间：
2007
影响因子：
5.2
作者：
Li-Zhi Zhang
通讯作者：
Li-Zhi Zhang
影响因子：
3.6
作者：
Simin Huang;Li-Zhi Zhang;Li-xia Pei
通讯作者：
Simin Huang;Li-Zhi Zhang;Li-xia Pei