Exceptional water production yield enabled by batch-processed portable water harvester in semi-arid climate

He Shan, Chunfeng Li, Zhihui Chen, Wenjun Ying, Primož Poredoš, Zhanyu Ye, Quanwen Pan (), Jiayun Wang and Ruzhu Wang ()
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He Shan: Shanghai Jiao Tong University
Chunfeng Li: Engineering Research Center of Solar Power & Refrigeration, MOE China
Zhihui Chen: Shanghai Jiao Tong University
Wenjun Ying: Engineering Research Center of Solar Power & Refrigeration, MOE China
Primož Poredoš: Shanghai Jiao Tong University
Zhanyu Ye: Shanghai Jiao Tong University
Quanwen Pan: Engineering Research Center of Solar Power & Refrigeration, MOE China
Jiayun Wang: Engineering Research Center of Solar Power & Refrigeration, MOE China
Ruzhu Wang: Shanghai Jiao Tong University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Sorption-based atmospheric water harvesting has the potential to realize water production anytime, anywhere, but reaching a hundred-gram high water yield in semi-arid climates is still challenging, although state-of-the-art sorbents have been used. Here, we report a portable and modularized water harvester with scalable, low-cost, and lightweight LiCl-based hygroscopic composite (Li-SHC) sorbents. Li-SHC achieves water uptake capacity of 1.18, 1.79, and 2.93 g g−1 at 15%, 30%, and 60% RH, respectively. Importantly, considering the large mismatch between water capture and release rates, a rationally designed batch processing mode is proposed to pursue maximum water yield in a single diurnal cycle. Together with the advanced thermal design, the water harvester shows an exceptional water yield of 311.69 g day−1 and 1.09 g gsorbent−1 day−1 in the semi-arid climate with the extremely low RH of ~15%, demonstrating the adaptability and possibility of achieving large-scale and reliable water production in real scenarios.

Date: 2022
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DOI: 10.1038/s41467-022-33062-w

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