Viability of a practical multicyclic sorption-based water harvester with improved water yield

Wenwen Wang; Quanwen Pan; Zheli Xing; Xueying Liu; Yanjun Dai; Ruzhu Wang; Tianshu Ge

doi:10.1016/j.watres.2021.118029

Viability of a practical multicyclic sorption-based water harvester with improved water yield

Water Res. 2022 Mar 1:211:118029. doi: 10.1016/j.watres.2021.118029. Epub 2021 Dec 31.

Authors

Wenwen Wang¹, Quanwen Pan², Zheli Xing², Xueying Liu³, Yanjun Dai¹, Ruzhu Wang¹, Tianshu Ge⁴

Affiliations

¹ Institute of Refrigeration and Cryogenic, Shanghai Jiao Tong University, Shanghai 200240, China.
² Cryogenic Center, Zhejiang University City College, Hangzhou 310015, China.
³ National Defense Engineering Institute, Academy of Military Science of PLA, Beijing 100036, China.
⁴ Institute of Refrigeration and Cryogenic, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: baby_wo@sjtu.edu.cn.

PMID: 35030362
DOI: 10.1016/j.watres.2021.118029

Abstract

Sorption-based atmospheric water harvesting (SAWH) has emerged as an attractive way to relieve water scarcity. However, the daily water yield of currently reported SAWH devices remains low to satisfy the rising demand for drinking water. The sorption and desorption kinetics, long-term stability and especially facile scaling-fabrication of adsorbents and scaled-up device implementation have become the bottleneck to such large-scale SAWH application. To overcome these challenges, an air-cooled SAWH device was fabricated to investigate its atmospheric water harvesting (AWH) performance under real island climate and its feasibility of multicyclic operation. Under monocyclic operation, the device demonstrated the superior water productivity as much as 3.9 kg day^-1, or 0.39 kg_water kg_adsorbent^-1 day^-1, at 31 °C and 70% RH, with a thermal efficiency of 25.4% (desorption at 94 °C). The SAWH device demonstrated successful water production through 2 adsorption-desorption cycles within one day, with increased thermal efficiency to as high as 32.2% and increased water harvesting performance up to 0.42 kg_water kg_adsorbent^-1 day^-1 by 20-90%. This is the first demonstration in multicyclic SAWH at large scales, holding the promise of large-scale and practical water supply in island areas while opening up new applications such as indoor dehumidification.

Keywords: Air-cooled condensation; Atmospheric water harvesting (AWH); Field trial; Island climate; Two adsorption-desorption cycles.

MeSH terms

Adsorption
Kinetics
Water Supply*
Water*

Substances

Water