Cyclic simulation and energy assessment of closed-circuit RO (CCRO) of brackish water
Cyclic simulation and energy assessment of closed-circuit RO (CCRO) of brackish water
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苦咸水闭路反渗透（CCRO）循环模拟与能耗评估
DOI：
10.1016/j.desal.2022.116149
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发表时间：
2023
期刊：
影响因子：
9.9
通讯作者：
Li, Mingheng
中科院分区：
文献类型：
--
作者：
Li, Mingheng
改进了先前开发的时空模型，以模拟闭环RO （CCRO）的详细动态和循环行为。偏微分方程（PDE）模型耦合了水平衡、盐平衡和动量平衡，明确地解释了闭路（CC）和冲洗模式下的压降、浓度极化和轴向弥散。采用与工业微咸水厂相似的模拟工况，从热力学约束、流量要求、流动阻力、浓度极化和盐潴留等方面分析了循环稳态下CCRO的比能耗（SEC）。在工业条件下使用相同的助熔剂的基础上，CCRO在低盐度微咸水脱盐方面不如最先进的多级RO节能。以较低的通量运行CCRO可使其具有竞争力。
A previously developed spatiotemporal model is enhanced to simulate detailed dynamic and cyclic behavior of closed-circuit RO (CCRO). The partial differential equation (PDE) model couples water balance, salt balance and momentum balance and explicitly accounts for pressure drop, concentration polarization and axial dispersion in both closed-circuit (CC) and flushing modes. Simulation case studies using conditions similar to those in a well-studied industrial brackish water plant were carried out and the specific energy consumption (SEC) in CCRO at the cyclic steady state (CSS) was analyzed from thermodynamic restriction, flux requirement, flow resistance, concentration polarization and salt retention. On the basis of the same flux used in industrial conditions, CCRO is not as energy efficient as state-of-the-art multi-stage RO for low-salinity brackish water desalination. Operating CCRO at a reduced flux can make it competitive.
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