Fig. 5 shows the results of the experiments
performed during the month of October to
determine the optimum direction angle for the
still by changing the still direction few degrees
toward the east and west from the geographic
south, to detect the optimal angle that will give
the higher yield. Such deviation is required as
the movement of the sun varies in direction
between summer and winter. From the productivity of the still, it can be seen that the optimal
angle is found to be 10
to the west of the
geographic south during the winter season in
Jordan. These results show that tracking the
sun is one of the preferred methods to increase
the still yield. It is clear from the figure that the
effect is not significant.