Abstract Entropy generation analysis is an important tool to evaluate the irreversible losses of the electrodialysis desalination system. Conventional entropy generation analysis of electrodialysis cell pair comprises of various sources of entropy generation. The primary sources were reported to be salt transport through ion exchange membranes, viscous losses, and pressure drop. In the present study, an exergy-based approach is implemented to calculate the maximum possible entropy generation rates (which was not addressed in the literature), in addition to current efficiency, voltage efficiency, and exergy efficiency. Unlike prior research, the present study calculated higher entropy generation rates (~20%) due to the accommodation of entropy generation from all the contributed sources. The exergy-based model is used to quantify entropy generation in various zones of the electrodialysis cell pair. The possible locations of entropy generation in a cell pair are found to be ion-exchange membranes, solutions, boundary layers, and so on. The membranes' contribution reaches 80% of the total entropy generation value, while the diluate and concentrate channels could contribute to 16%. The rest (~4%) is attributed to the boundary layers at the membrane-solution interfaces, while other sources are minimal. It is found that the optimal performance can be obtained at a channel width of 0.5–0.65 mm.

中文翻译：

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基于火用的电渗析脱盐系统熵生成分析

摘要 熵产生分析是评价电渗析脱盐系统不可逆损失的重要工具。电渗析池对的常规熵生成分析包括各种熵生成源。据报道，主要来源是通过离子交换膜的盐传输、粘性损失和压降。在本研究中，除了电流效率、电压效率和火用效率之外，还实施了一种基于火用能的方法来计算最大可能的熵生成率（文献中没有提到）。与之前的研究不同，本研究计算出更高的熵生成率（~20%），这是由于所有贡献来源的熵生成的适应。基于火用能的模型用于量化电渗析池对的各个区域中的熵产生。发现细胞对中熵产生的可能位置是离子交换膜、溶液、边界层等。膜的贡献达到总熵生成值的 80%，而稀释和浓缩通道可以贡献 16%。其余的 (~4%) 归因于膜-溶液界面处的边界层，而其他来源则很少。发现在 0.5-0.65 mm 的通道宽度下可以获得最佳性能。贡献达到总熵生成值的 80%，而稀释和浓缩通道可以贡献 16%。其余的 (~4%) 归因于膜-溶液界面处的边界层，而其他来源则很少。发现在 0.5-0.65 mm 的通道宽度下可以获得最佳性能。贡献达到总熵生成值的 80%，而稀释和浓缩通道可以贡献 16%。其余的 (~4%) 归因于膜-溶液界面处的边界层，而其他来源则很少。发现在 0.5-0.65 mm 的通道宽度下可以获得最佳性能。