| Roman | |
| C | concentration (mol/L) |
| E | electromotive force (V) |
| F | Faraday constant (96 485 C∙mol−1) |
| i | electrical current (A) |
| Loss | internal loss in the stack (W) |
| M | molecular weight of NaCl (0.05844 kg/mol) |
| MD | mixing degree |
| n | transport parameter (kg/s) |
| R | gas constant (8.32432 J∙mol−1 K−1) |
| Re | external resistance of a RED stack (load) (Ω) |
| Ri | internal resistance of a RED stack (load) (Ω) |
| P | power (W) |
| T | temperature (K) |
| Uc | clamp voltage (V) |
| V | volume (m3) |
| X | exergy flow (W) |
| Greek | |
| ε | thermodynamic efficiency |
| η | energy efficiency |
| Φ | flow rate (m3/s) |
| Subscripts | |
| hydro | hydrodynamic |
| i | inlet |
| o | outlet |
| opt | optimal |
| r | river |
| s | sea |
| Acronyms | |
| EM | anion exchange membrane |
| CEM | cation exchange membrane |
| ED | electrodialysis |
| EMF | electromotive force |
| RED | reverse electrodialysis |
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