Recent work has demonstrated adsorption-based solar-thermal-driven atmospheric water harvesting (AWH) in arid regions, but the daily water productivity (L/m²/day) of devices remains low. We developed and tested a dual-stage AWH device with optimized transport. By recovering the latent heat of condensation of the top stage and maintaining the required temperature difference between stages, the design enables higher daily water productivity than a single-stage device without auxiliary units for heating or vapor transport. In outdoor experiments, we demonstrated a dual-stage water harvesting device using commercial zeolite (AQSOA Z01) and regeneration under natural, unconcentrated sunlight where ∼0.77 L/m²/day of water was harvested. Our modeling showed that by further increasing top-stage temperatures via design modifications, approximately twice the daily productivity of the single-stage configuration can be achieved. This dual-stage device configuration is a promising design approach to achieve high performance, scalable, and low-cost solar-thermal AWH.

最近的工作表明，在干旱地区，基于吸附的太阳热能驱动的大气水收集（AWH），但是设备的每日水生产率（L / m ² / day）仍然很低。我们开发并测试了具有优化运输功能的双级AWH设备。通过回收顶级冷凝水的潜热并保持所需的两级之间的温差，与没有辅助装置进行加热或蒸汽输送的单级装置相比，该设计能够实现更高的每日水生产率。在户外实验中，我们展示了一种使用商用沸石（AQSOA Z01）的双级集水装置，并在自然，不集中的阳光（约0.77 L / m ²）下进行再生/天的水被收获。我们的模型表明，通过修改设计进一步提高顶级温度，可以实现单级配置日产量的大约两倍。这种双阶段设备配置是一种有前途的设计方法，可以实现高性能，可扩展且低成本的太阳热能AWH。