Ambient Water Harvesting via Radiative Cooled Sorbent

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Researchers at Purdue University have developed a method for ambient water harvesting (AWH) that works across a wide range of environmental conditions while requiring zero active energy input. By leveraging multiple mechanisms of atmospheric water harvesting, Purdue's approach can harvest water at relative humidities (RH) between 8% to 90%. This mitigates drawbacks previously associated with AWH systems that only worked within specific condition ranges and produced limited yields. Applications of this technology include ambient water harvesting in areas where freshwater is not readily available. This technology also offers a method to combat water scarcity in regions where other water harvesting approaches (desalination, solar steam generation) are not viable.

- No required active energy input
- Tested operating range of 8% to 90% RH
- Capable of harvesting 6.75 L/kg/day

- Ambient water harvesting
- Addressing water scarcity

Technology Validation:
This technology has been validated through testing of a prototype system at humidity ranges from <8% to 90% RH with demonstrated yields of up to 6.75 L/kg/day.

Related Publications:

Y. Zhang, et al, T. Li, "Atmospheric Water Harvesting via Radiative Cooling Fabric", Nano Letters, 22.7, 2618-2626. 2022

W. Zhu, et al, T. Li, "Radiative Cooled Sorbent for High Performance All Weather Ambient Water Harvesting", under revision, DOI:
Dec 13, 2022
United States
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