Effect of Nanofluids on the performance of solar still without external condenser is shown in Figs.
6 and 7. The solar radiation and temperature profiles have the same behavior for all the days of the
testing as shown in Fig. 6. The only difference that can be seen from the figure is that the basin water
temperature of the modified still is more than the water temperature of the conventional still by 2 - 5
°C.