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A survey was made to see how to improve the productivity of a solar distiller via different angles of inclination of the glass cover. For this, six identical solar stills with different angles of cover inclination were designed and installed side by side in the same weather conditions in the south of Algeria (Ouargla city). The angles studied in the experiment were (10°, 15°, 20°, 30°, 35° and 45°). The results obtained showed that the best inclination was 30° in the autumn and winter seasons with a production of 3.517 and 3.633 Kg.m −2 , respectively; whereas the best inclination in the spring and summer seasons was 20° with a yield of 5.224 and 4.527 Kg.m −2 , respectively.

The effect of tilt angle on solar still productivity at different seasons in arid conditions (south Algeria)