**3. Proposed system operation**

 The detailed schematic of TES driven hybrid MEDAD desalination cycle is shown in **Figure 4**. During day time operation, solar heat is supplied to the hydrated Mg(OH)2 at 300–400°C and regenerated vapor condensation heat at 120–150°C is utilized to operate desalination cycle. At night time, the hydration of MgO generates sufficient heat due to exothermic reaction that is supplied to the desalination cycle to continue the operation. It can be noticed that with MgO energy storage system, thermal desalination can be operated for 24 h using solar energy.

**Figure 4.**  *Proposed TES driven hybrid MEDAD desalination cycle.* 
