In the present study, a galvanized iron stepped solar still is examined via a solar simulator with a radiation power of 904 W/m². To enhance the evaporation rate, a number of galvanized iron fins were fabricated to create hot points on step surfaces. For the experimental study, the input feedwater flow rate was set to be 0.086, 0.098, 0.146, 0.167, and 0.190 lit/min, measuring the temperatures of different points in the system and freshwater production rate in the internal and external condenser during 150 min at each of these flow rates. Then, the temperature variations and distillate production rates were provided in the form of diagrams. To complete the study, the cost of distillate production in different conditions was calculated. The results showed that the distillate production rate, and consequently, the cost of distillate production were lower at smaller flow rates. In all the distillation production tests, the curve began at a relatively small slope and then continued to rise linearly. As a result, it was observed that distillate production would continue if the solar simulator operated for a longer time. Furthermore, the optimal initial feedwater flow rate for the maximization of distillation production seemed to occur at the flow rates of 0.086 and 0.098 lit/min. The lowest prime cost of distillate production was obtained to be 9.4 ¢/L at the lowest flow rates, which was found to be acceptable in comparison with similar studies.

在本研究中，通过辐射功率为 904 W/m ²的太阳模拟器检查镀锌铁阶梯式太阳能蒸馏器. 为了提高蒸发率，制造了许多镀锌铁翅片，以在台阶表面形成热点。在实验研究中，输入给水流量设置为 0.086、0.098、0.146、0.167 和 0.190 lit/min，在 150 分钟内测量系统中不同点的温度和内外冷凝器的淡水产量在这些流速中的每一个。然后，以图表的形式提供了温度变化和馏出物生产率。为了完成这项研究，计算了不同条件下馏分油的生产成本。结果表明，在较小的流速下，馏出物的生产速率以及因此的馏出物生产成本较低。在所有的蒸馏生产试验中，曲线以相对较小的斜率开始，然后继续线性上升。结果，观察到如果太阳模拟器运行更长时间，馏出物生产将继续。此外，使蒸馏产量最大化的最佳初始给水流速似乎出现在 0.086 和 0.098 升/分钟的流速下。在最低流速下获得的馏分油生产的最低主要成本为 9.4 ¢/L，与类似研究相比，这是可以接受的。