The experimental study in this manuscript aims to enhance the performance of tubular solar distillers. The tubular distillers are characterized by having a large surface area for receiving and condensing compared to a single-slope distiller, and accordingly, the use of floating sponge layers is a good and very effective choice in increasing the rate of evaporation and thus improving the cumulative yield of the tubular distillers. In order to obtain the optimum specifications of the sponge layers that achieve the highest performance of the tubular distillers, four tubular distillers were designed and constructed; the first is a reference distiller without sponge and the other three tubular distillers contain the sponge layers with different specifications. The experimentations were conducted in two stages: in the first stage, three different thicknesses of the sponge layer (20, 30, and 40 mm) were studied. In the second stage, three different densities of the sponge layer (16, 20, and 30 kg/m³) were studied. All test cases were compared with reference distiller under the same climatic conditions of Egypt. The results show that the utilization of a floating sponge improves the tubular distiller performance. The peak improvement in the accumulative yield of tubular distillers was achieved in case of utilizing a sponge layer with a 30-mm thickness and 16-kg/m³ density. The reference distiller gives maximum accumulative yield of 3.72 L/m² day while the floating sponge layer utilization improves the accumulative yield to 5.92 L/m² day with 59.2% improvement. Also, the utilization of floating sponge layer reduced the cost of distillate yield by 36.3% compared to reference distiller.

本手稿中的实验研究旨在提高管状太阳能蒸馏器的性能。管状蒸馏器的特点是与单坡度蒸馏器相比，具有较大的接收和冷凝表面积，因此，使用浮动海绵层是增加蒸发速率并因此提高累积率的良好且非常有效的选择。管状蒸馏器的产量。为了获得能达到管状蒸馏器最高性能的海绵层的最佳规格，设计并制造了四个管状蒸馏器。第一个是没有海绵的参考蒸馏器，其他三个管状蒸馏器包含不同规格的海绵层。实验分两个阶段进行：在第一阶段，研究了三种不同厚度的海绵层（20、30和40 mm）。在第二阶段，海绵层的三种不同密度（16、20和30 kg / m³）进行了研究。在埃及相同的气候条件下，将所有测试用例与参考蒸馏器进行了比较。结果表明，利用浮动海绵提高了管状蒸馏器的性能。在使用厚度为30 mm的海绵层和密度为16 kg / m ³的海绵层的情况下，管式蒸馏器的累计收率达到了峰值提高。参考蒸馏器的最大累积产量为3.72 L / m ²天，而浮动海绵层的利用将累积产量提高至5.92 L / m ²天，提高了59.2％。而且，与参考蒸馏器相比，利用浮动海绵层的使用将馏出物产率的成本降低了36.3％。