A photovoltaic-powered rapid-cycling sorption system for sustainable off-grid atmospheric water harvesting

IF 10.9 1区工程技术 Q1 ENERGY & FUELS

Energy Conversion and Management Pub Date : 2025-10-02 DOI:10.1016/j.enconman.2025.120576

Fen Jiang , Qiongfen Yu , Ming Li , Zhijin Wang , Lei Shu , Shengnan Sun , Danya Zhan , Zhongfan Mo , Zhihao Song , Runfang Ma , Meidi Ding , Hui Yao

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引用次数: 0

Abstract

Sorption-based atmospheric water harvesting (SAWH) technology exhibits great potential for strong environmental adaptability and flexible deployment. However, current systems commonly rely on grid electricity or intermittent solar thermal sources, which makes continuous and stable operation difficult and limits application reliability and scalability. Herein, an innovative photovoltaic (PV) powered rapid-cycling SAWH system was proposed for sustainable off-grid water harvesting. Activated carbon fiber felt (ACFF) acted as both an adsorbent and a resistor. In-situ electric swing adsorption (ESA) technology was employed to enable the adsorbed ACFF to undergo rapid Joule heating and desorption. The SAWH system achieved four daily cycles with a single sorption bed by optimizing the adsorption–desorption strategy. Experimental results showed that under 15 °C and 70 % relative humidity, the fan-assisted water cooling condensation mode was utilized to achieve a daily water production (DWP) of 0.96 kg_water/kg_ACFF/day with a low specific energy consumption (SEC) of 2.59 kW·h/kg_water. Even in the arid climate of Kunming during January, an equal-time adsorption mode (4.5 h × 4) was adopted to maintain a DWP of 0.50 kg_water/kg_ACFF/day with a SEC of 4.86 kW·h/kg_water. A six-day outdoor water collection test demonstrated that the PV panels consistently supplied sufficient energy to meet the SAWH system’s demand, with an energy conversion efficiency above 15 %. This stable power supply enabled continuous freshwater production under varying weather conditions, including sunny, cloudy, overcast, and nighttime days. The results validated the feasibility and practicality of this study as a green and sustainable solution for clean water harvesting.

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一种用于可持续离网大气水收集的光伏动力快速循环吸附系统

基于吸附的大气集水（SAWH）技术具有很强的环境适应性和灵活部署的潜力。然而，目前的系统通常依赖于电网供电或间歇性太阳能热源，这使得持续稳定运行变得困难，限制了应用的可靠性和可扩展性。本文提出了一种创新的光伏（PV）驱动的快速循环SAWH系统，用于可持续的离网集水。活性炭纤维毡（ACFF）既是吸附剂又是电阻。采用原位电振荡吸附（ESA）技术，使吸附的ACFF进行快速焦耳加热和解吸。通过优化吸附-解吸策略，SAWH系统在单个吸附床上实现了4个日循环。实验结果表明，在15℃、70%相对湿度条件下，采用风机辅助水冷凝方式，日产水量为0.96 kgwater/kgACFF/day，比能耗（SEC）为2.59 kW·h/kgwater。即使在昆明1月份的干旱气候条件下，采用等时间吸附模式（4.5 h × 4），保持了0.50 kgwater/kgACFF/d的DWP和4.86 kW·h/kgwater的SEC。为期六天的室外集水测试表明，光伏板持续提供足够的能量，以满足SAWH系统的需求，能量转换效率超过15%。这种稳定的电力供应可以在各种天气条件下持续生产淡水，包括晴天、多云、阴天和夜间。结果验证了本研究作为绿色和可持续的净水收集解决方案的可行性和实用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy Conversion and Management 工程技术-力学

CiteScore

19.00

自引率

11.50%

发文量

1304

审稿时长

17 days

期刊介绍： The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.