D THEORETICAL STUDY OF THE CONVENTIONAL AND MODIFIED SOLAR STILL

الملخص

The fresh water reserves on the earth are finite. The brackish water can be converted to
the fresh water by solar water distillery. A theoretical investigation to investigate the effect of
the turning hollow-cylinder within the solar still equipped with flat plate solar water collector
on the output of distillate water and its thermal efficiency. The numerical analysis was carried
out by using FORTRAN 90, program. The numerical analysis is used for complex phenomena
without resorting to expensive prototypes and difficult experimental measurements. The study
considered several parameters which are; solar radiation intensity, ambient air temperature,
ambient wind velocity, basin plate temperature, basin water temperature, glass cover
temperature and hollow cylinder surfaces temperature. The cumulative of distillate water
output from the modified solar still increased compared with the conventional solar still by a
factor not less than 240%