In this experimental work, a comparative energy and exergy efficiency study of hemispherical solar still and a single-slope solar still has been carried out. The experiments were conducted in southeast Algeria on 25-5-2020 and 3-6-2020 in the natural climatic environment, and daily accumulation of distilled water produced for both distilleries was measured. The maximum obtained cumulative yield of distilled products is equal to 5.38 kg/m²/day for the hemispherical solar still, and 3.64 kg/m²/day for the single-slope solar still. The overall daily productivity was improved by 47.96% for the hemispherical solar still compared to the single-slope solar still. The maximum daily energy efficiency of the single-slope solar still is 25.81%, and hemispherical solar still is 38.61%. Similarly, the maximum daily exergy efficiency of single-slope solar still is 1.8%, and hemispherical solar still is 3.1%. The main conclusion from the study is the hemispherical distillery greatly enhances productivity as compared to the single-slope distillate and gives more efficiency. Thus, the hemispherical solar still is recommended to be used to provide safe drinking water from salty water.

在这项实验工作中，对半球形太阳能蒸馏器和单斜面太阳能蒸馏器进行了比较能量和火用效率研究。实验于 2020 年 5 月 25 日和 2020 年 3 月 6 日在阿尔及利亚东南部的自然气候环境中进行，并测量了两家酿酒厂生产的蒸馏水的每日累积量。蒸馏产物的最大累积产量等于半球形太阳能蒸馏器的5.38 kg/m ² /天，3.64 kg/m ²/天为单坡太阳能蒸馏器。与单坡度太阳能蒸馏器相比，半球形太阳能蒸馏器的整体日生产率提高了47.96%。单坡太阳能蒸馏器日最高能效为25.81%，半球形太阳能蒸馏器为38.61%。同样，单斜面太阳能的最大每日有效用能效率仍为 1.8%，半球形太阳能仍为 3.1%。该研究的主要结论是，与单坡度馏出物相比，半球形酒厂大大提高了生产率并提高了效率。因此，建议使用半球形太阳能蒸馏器从咸水中提供安全的饮用水。