The world suffers from the potable water shortage problem. Solar still is a simple device used to convert the brackish water into a drinkable water. We proposed a new modification in the design of the pyramid solar still to enlarge the exposure area and decrease the depth of the water film as possible. So, four rotating cylinders were incorporated into the basin of the pyramid distiller. Also, three electric heaters were fixed on the basin water to raise its temperature. The energy required to run the heaters was captured from a PV system. The performance of the modified pyramid solar still with rotating cylinders (MPSSRC) was investigated under different rotating speeds (0.1, 0.2, 0.5, 1.0, 1.5, and 2.0 rpm). The experimental results revealed that the total distillates of the MPSSRC without heaters and reference still were 7300 and 3000 mL/m² a day, respectively with an improvement of 143%. In addition, the total distillates of the MPSSRC with heaters and reference still were 9100 and 2900 mL/m² a day, respectively. So, the productivity was enhanced by 214%. The optimum increase in productivity was obtained at the cylinders’ speed of 0.5 rpm. The optimum thermal efficiency of the MPSSRC was obtained when using the electric heaters with the rotating speed of 0.5 rpm, where it was 65% and 54% for the MPSSRC with and without heaters, respectively.

世界遭受饮用水短缺问题的困扰。太阳能蒸馏器是一种简单的设备，用于将微咸水转化为饮用水。我们对金字塔型太阳能蒸馏器的设计提出了新的修改方案，以扩大曝光面积并尽可能减小水膜的深度。因此，四个旋转圆柱体被合并到金字塔蒸馏器的盆中。另外，三个电加热器被固定在盆水上以提高其温度。运行加热器所需的能量是从PV系统中捕获的。在不同的转速（0.1、0.2、0.5、1.0、1.5和2.0 rpm）下研究了带旋转圆柱体（MPSSRC）的改进的金字塔型太阳能蒸馏器的性能。实验结果表明，不带加热器和参比样品的MPSSRC的总馏出物仍为每天7300和3000 mL /m²，分别提高了143％。此外，带加热器和参比样品的MPSSRC的总馏出物仍分别为每天9100和2900 mL /m²。因此，生产率提高了214％。气缸转速为0.5 rpm时，生产率得到了最佳的提高。当使用转速为0.5 rpm的电加热器时，可以获得MPSSRC的最佳热效率，其中带加热器和不带加热器的MPSSRC分别为65％和54％。生产率提高了214％。气缸转速为0.5 rpm时，生产率得到了最佳的提高。当使用转速为0.5 rpm的电加热器时，可以获得MPSSRC的最佳热效率，其中带加热器和不带加热器的MPSSRC分别为65％和54％。生产率提高了214％。气缸转速为0.5 rpm时，生产率得到了最佳的提高。当使用转速为0.5 rpm的电加热器时，可以获得MPSSRC的最佳热效率，其中带加热器和不带加热器的MPSSRC分别为65％和54％。