A new energy-efficient topology for solar-powered capacitive deionization systems

Seleym, Ashraf; Elshafei, Moustafa

doi:10.1109/epec.2017.8286180

Cited by 3 publications

(3 citation statements)

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“…In this regard, it is common to model this type of cell by means of the simple supercapacitor model indicated above (C + R S + R P ). Despite the simplicity of this model, it proves very useful in the subsequent design of electronic converters [24,25].…”

Section: Characteristics Of the Capmix Cellmentioning

confidence: 99%

“…Power topologies can be found in similar applications such as capacitive deionization (CDI) [24,25], where energy is transferred between CDI cells, making their voltage vary up to 2 V. Less related applications use supercapacitors or batteries as intermediate energy storage elements [30,31]. However, none of these applications involve voltage levels comparable to those present in CapMix cells.…”

Section: Electronic Converter Topologymentioning

confidence: 99%

“…This figure also shows that, due to the high output voltage fixed by the grid, the inductor discharge is again very fast as compared with the time needed for the charging process. Although the current thus injected into the grid is mainly formed by spikes, Section 3.4 has already indicated that it is possible to reduce high-frequency harmonics by connecting several bridgeless buck-boost converters in parallel to have a multistage interleaved converter that transfers the energy from the cells to the grid through the nonautonomous inverter [22][23][24].…”

Section: Energy Transfer To the Gridmentioning

confidence: 99%

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Current Source Strategy for Energy Injection from a CapMix Cell

Busto,

Prieto,

Martín-Ramos

et al. 2023

Electronics

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Circulation of salty and fresh water through the electrodes of a deionization cell produces a voltage between the electrodes caused by the Capacitive Donnan Potential (CDP). The voltage so generated is very low (100 mV), but this work demonstrates that it is possible to develop a power converter suitable to inject this energy into the grid or into energy storage systems; this is a relevant aspect of this paper, for most works in the literature simply dissipate this energy over a resistor. To increase the input voltage, a stack of electrodes is connected in series. A bridgeless rectifier that uses a dual buck–boost converter to operate with both the positive and negative cycles is used to extract the energy from the cell. The topology chosen, which is operated as a current source, can work at extremely low voltage levels and provide power factor correction. After this stage, an H-bridge inverter can be included to inject the energy into the AC grid. The whole system implements a hysteresis control system using the current through the inductor of the power converter as control variable. This paper investigates the influence of such current on the efficiency of the total system.

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Section: Characteristics Of the Capmix Cellmentioning

confidence: 99%