Abstract Direct solar steam generation (DSSG) as a green purification technology only driven by solar energy has attracted the attention of researchers. Compared with large-scale water purification technologies such as membrane distillation, reverse osmosis and multistage flash distillation, it has convenient, low cost and distributed features. In recent years, water path of evaporator has been gradually optimized and some new strategies has been promoted. In this review, we summarize the development of water path as well as new evaporation strategies including utilizing environmental energy, multi-level utilization of energy efficiency and decreasing evaporation enthalpy. Future research direction and problems to be solved has also been discussed. The current deficiencies and challenges have been pointed to speed the practical application of distributed DSSG purification technology.

中文翻译：

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打破太阳能直接蒸汽发电理论蒸发限制的策略

摘要 太阳能直接蒸汽发电（DSSG）作为一种仅由太阳能驱动的绿色净化技术引起了研究人员的关注。与膜蒸馏、反渗透、多级闪蒸等大规模净水技术相比，具有方便、成本低、分布式等特点。近年来，蒸发器的水路逐渐优化，并推出了一些新的策略。在这篇综述中，我们总结了水路的发展以及新的蒸发策略，包括利用环境能源、多层次利用能效和降低蒸发焓。还讨论了未来的研究方向和需要解决的问题。