Solar-driven water evaporation (SDWE) has unique advantages, such as no additional energy consumption and low cost, and is a promising technology for obtaining fresh water from seawater and wastewater. Much research is devoted to gaining a high evaporation rate and ignoring the final water yield. Many innovative devices and water collection strategies aiming to gain a high water yield have been reported; however, an in-depth discussion of the water yield of SDWE is still missing. In this review, we summarize some typical SDWE systems, which are categorized as condensation design, steam directional migration, and recovered latent heat. The advantages and improvements of these devices are specifically discussed. Finally, the challenges and the technical requirements for future SDWE systems are briefly summarized, hoping to provide thoughts and tips for scholars who are new to this field to avoid ignoring water yield in favor of a high evaporation rate.

中文翻译：

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冷凝装置设计是太阳能驱动水蒸发走向实际应用的关键一步

太阳能水蒸发（SDWE）具有无需额外能源消耗、成本低等独特优势，是一种很有前景的从海水和废水中获取淡水的技术。许多研究致力于获得高蒸发率而忽略了最终的水产量。据报道，许多旨在获得高产水量的创新设备和集水策略；然而，仍然缺乏对SDWE产水量的深入讨论。在这篇综述中，我们总结了一些典型的SDWE系统，分为冷凝设计、蒸汽定向运移和回收潜热。详细讨论了这些设备的优点和改进。最后，简要总结了未来SDWE系统面临的挑战和技术要求，希望能为刚接触该领域的学者提供思考和提示，避免为了高蒸发率而忽视产水量。