Optimal design and operation of electrodialysis for brackish-water desalination and for high-salinity brine concentration
Optimal design and operation of electrodialysis for brackish-water desalination and for high-salinity brine concentration
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DOI：
10.1016/j.desal.2017.07.003
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发表时间：
2017-10-15
期刊：
影响因子：
9.9
通讯作者：
Lienhard, John H., V
中科院分区：
文献类型：
--
作者：
Chehayeb, Karim M.;Farhat, Daniel M.;Lienhard, John H., V
电渗析（艾德）是一种已经在商业上应用了几十年的脱盐技术。然而，在文献中很少有研究着眼于这些系统的最佳设计和操作，特别是高盐度盐水的浓度。在本文中，定义了一组约束条件，允许不同的系统尺寸，设计和操作条件之间的公平比较。研究了艾德在一定系统规模下的苦咸水淡化和高盐度盐水浓缩应用中的设计和运行。确定固定尺寸系统的功率消耗的变量集被减少到仅包括通道高度和速度，所有其他设计和操作变量取决于这两个变量。在研究了固定系统尺寸的功耗最小化后，研究了与不同系统尺寸相关的最低成本，并比较了咸水和高盐度应用的不同趋势。最后，本文介绍了成本建模参数的效果的最佳系统的大小，电流密度，长度，通道高度和速度的趋势的两个应用程序的研究。
Electrodialysis (ED) is a desalination technology that has been deployed commercially for decades. However, few studies in the literature have looked at the optimal design and operation of these systems, especially for the concentration of high-salinity brines. In this paper, a set of constraints is defined to allow a fair comparison between different system sizes, designs, and operating conditions. The design and operation of ED are studied for the applications of brackish-water desalination and of high-salinity brine concentration for a fixed system size. The set of variables that determine the power consumption of a fixed-size system is reduced to include only the channel height and the velocity, with all the other design and operation variables depending on these two variables. After studying the minimization of power consumption for a fixed system size, the minimum costs associated with the different system sizes are studied, and the differing trends in brackish-water and high-salinity applications are compared. Finally this paper presents the effect of the cost modeling parameters on the trends of the optimal system size, current density, length, channel height, and velocity for the two applications studied.