Abstract In this study, we report on a solar membrane distillation (MD) system with a 5-stack Ti/MgF2 solar absorber adapted as a heat source under actual weather conditions. The 5-stack Ti/MgF2 solar absorber showed light absorption of 85% over the wavelength range from 0.3 to 2.5 μm. This consequently induced greater heat and a two-fold greater water heating capability up to 80 °C for water in a closed water tank without insulation under a 1-sun illumination. The enhanced solar absorption of the Ti/MgF2 solar absorber showed a 12% improvement in permeate flux of the integrated MD system compared with a system without a solar absorber. Under actual weather conditions, the solar DCMD system with the Ti/MgF2 solar absorber successfully produced distillate water in the range of 0.51–4.78 L/m2·day depending on weather conditions. Despite unfavorable solar irradiance conditions in autumn, the integrated DCMD system with the Ti/MgF2 solar absorber proved superior to a conventional commercial evacuated-tube solar collector in terms of daily production of distillate water and solar energy requirements for certain amounts of distillate.

中文翻译：

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在实际天气环境下使用 Ti/MgF2 太阳能吸收器增强直接接触膜蒸馏 (DCMD) 系统的性能

摘要 在这项研究中，我们报告了一种太阳能膜蒸馏 (MD) 系统，该系统具有在实际天气条件下用作热源的 5 层 Ti/MgF2 太阳能吸收器。5 层 Ti/MgF2 太阳能吸收器在 0.3 到 2.5 μm 的波长范围内显示出 85% 的光吸收率。因此，在 1 太阳光照射下，对于没有绝缘的封闭水箱中的水，这导致了更大的热量和两倍的水加热能力，最高可达 80°C。与没有太阳能吸收器的系统相比，Ti/MgF2 太阳能吸收器增强的太阳能吸收表明集成 MD 系统的渗透通量提高了 12%。在实际天气条件下，带有 Ti/MgF2 太阳能吸收器的太阳能 DCMD 系统成功地产生了 0.51–4.78 L/m2·day 范围内的蒸馏水，具体取决于天气条件。