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Management of solar energy to power electrochemical wastewater treatments
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2021-04-03 , DOI: 10.1016/j.jwpe.2021.102056
M. Millán , C.M. Fernández-Marchante , J. Lobato , P. Cañizares , M.A. Rodrigo

In this work, the management of photovoltaic (PV) energy, assisted by a redox flow battery (RFB), for powering an electrochemical advanced oxidation process (EAOP), is evaluated. The storage of surplus energy allows to extend the treatment time overnight and to increase the environmental remediation efficiency during the whole electrochemical treatment. Nevertheless, this work points out that it is important to evaluate the most suitable powering strategy to take advantage of the total solar energy produced. The energy supplied by the PV panels to each system depends on the electrical features of the electrochemical devices (electrooxidation reactor and the RFB) and, especially, on the connection between them (series or parallel). A straightforward coupling (without a targeted regulation of the energy distributed between the EAOP and the RFB) brings out a time-depending and uncontrolled powering. This type of strategy opposes to the smarter regulation of the energy between the EAOP and the RFB by means of a targeted powering to each device. Results show higher remediation degrees when both electrochemical devices are directly coupled in parallel, regardless of the operational mode used (straightforward or targeted) due to lower current densities lead to higher global performances for both electrochemical devices. Nonetheless, it is important to note that the green targeted powering notices higher remediations than the straightforward coupling when the system operates under parallel connection and a RFB control. The low current densities supplied to the RFB point out higher capacities and, consequently, the remediation treatment is extended. Those results shed light on interesting conclusions in terms of green energy use. Furthermore, this software tool allows by means of a simple predictive modelling to optime the operational conditions of electrochemical treatments powered by renewable energies and assisted by energy storage systems.



中文翻译:

太阳能管理为电化学废水处理提供动力

在这项工作中,评估了在氧化还原液流电池(RFB)的辅助下为光伏高级氧化工艺(EAOP)供电的光伏(PV)能量的管理。剩余能量的存储可以将处理时间延长一整夜,并在整个电化学处理过程中提高环境修复效率。然而,这项工作指出,重要的是评估最合适的供电策略,以利用所产生的太阳能总量。PV面板提供给每个系统的能量取决于电化学装置(电氧化反应器和RFB)的电气特性,尤其取决于它们之间的连接(串联或并联)。直接耦合(无需针对EAOP和RFB之间分配的能量进行有针对性的调节)就可以实现时间依赖性和不受控制的供电。这种类型的策略反对通过为每个设备提供有针对性的电源来更智能地调节EAOP和RFB之间的能量。结果表明,当两个电化学装置直接并联并联时,无论使用哪种操作模式(直接或定向),由于较低的电流密度导致两个电化学装置的整体性能较高,因此修复程度更高。但是,重要的是要注意,当系统在并行连接和RFB控制下运行时,绿色目标电源的补救措施要比直接耦合的补救措施更高。提供给RFB的低电流密度表明容量更高,因此,补救措施得到了扩展。这些结果为绿色能源的使用提供了有趣的结论。此外,该软件工具允许通过简单的预测模型来控制由可再生能源提供动力并由储能系统辅助的电化学处理的运行条件。

更新日期:2021-04-04
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