**Author details**

H enthalpy (kJ/kg) MW molar mass

*Electrodialysis*

ORC organic Rankine cycle Pcrit critical pressure Psat saturated pressure Rm mass flow ratio

Rpp pressure ratio for pump Rpc pressure ratio for compressor

Tcit critical temperature (°C)

Q <sup>b</sup> boiler heat input (kW)

VCC vapor compression cycle

W compressor power

X title vapor

**Index**

**18**

1 pump inlet 2 pump outlet

4 expander outlet 10 compressor inlet 11 compressor outlet 11 condenser inlet 12 condenser outlet 13 evaporator 1 inlet 14 evaporator 1 outlet

Wexp expander work output (kW)

Th temperature in the panel solar (°C) Tg temperature in the boiler for ORC cycle

Q h2 heat input for the exchanger 2 (kW) Q ev1 the power of the evaporator 1 (kW) Q ev2 the power of the evaporator 2 (kW)

Q EV heat flow exchanged at the evaporator Q CD heat flow exchanged at the condenser

T temperature (°C)

m1 mass flow rate for ORC (kg/s) m2 mass flow rate for VCC cycle (kg/s) m3 mass flow rate for heated water

m4 mass flow rate for seawater desalination

Tev vaporization temperature for VCC cycle (°C)

Tcond condensation temperature for organic Rankine cycle Tsh overheating temperature for organic Rankine cycle

Q ev the overall power evaporated by the VCC cycle (kW)

Wcom working fluid pump power consumption (kW)

Wnet net work output for overall system (kW) Wpump working fluid pump power consumption (kW)

WT mechanical work of the turbine (KW) Wc mechanical work of the compressor (kW)

ηpump working fluid pump isentropic efficiency

η is1 compressor isentropic efficiency η is2 expander isentropic efficiency

ΔTPinch pinch temperature (°C)

3 boiler output and expander inlet

Noureddine Toujani\*, Nahla Bouaziz and Lakder Kairouani Energetic and Environmental Research Unity, National Engineering School of Tunis, Tunis El Manar University, Tunis, Tunisia

\*Address all correspondence to: toujeninoureddine@gmail.com

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
