A Combined Heat- and Power-Driven Membrane Capacitive Deionization System
A Combined Heat- and Power-Driven Membrane Capacitive Deionization System
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DOI：
10.1021/acs.estlett.7b00395
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发表时间：
2017-10
影响因子：
10.9
通讯作者：
Jiankai Zhang;K. Hatzell;M. Hatzell
中科院分区：
文献类型：
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作者：
Jiankai Zhang;K. Hatzell;M. Hatzell
在这里，我们实验研究了一种替代膜电容去离子（MCDI）系统循环，其目的是减少水处理所需的电能需求。所提出的热电联合 MCDI 系统利用废热来控制充电（海水淡化）和放电（能量回收）过程中带电电极的静电电位。实验结果表明，随着盐水温度从20℃升高到50℃，消耗的电能可减少近10%。我们还表明，当朝着更高的水回收率迈进时，静电势对浓度的依赖性可能会限制能量回收性能（功率）。通过评估非等温和非绝热系统运行，可以进一步探索替代的海水淡化循环。
Here, we experimentally investigate an alternative membrane capacitive deionization (MCDI) system cycle, which aims to reduce the required electrical energy demand for water treatment. The proposed heat and power combined MCDI system utilizes waste heat to control the electrostatic potential of the charged electrodes during the charging (desalination) and discharging (energy recovery) processes. The experimental findings suggest that with an increase in the temperature of the brine from 20 to 50 °C, the electrical energy consumed can be reduced by nearly 10%. We also show that the dependence of electrostatic potential on concentration may limit energy recovery performance (power), when moving toward higher water recoveries. Alternative desalination cycles can be further explored through evaluating non-isothermal and non-adiabatic system operation.