**3. Experimental set-up of the active solar still with FPC**

In this active still, a flat plate collector (FPC) was added to a conventional still as an additional heat source for heating the saline water.

As more heat was added to the saline water, the output of the still increased during the experiment at Ahmedabad. The experiment set-up of the active still is shown in **Figure 3**. The data was recorded with the help of a data logger and stored in a laptop.

**Figure 3.**  *Experimental set-up of the active solar still with FPC.* 
