Thermodynamic evaluation of advanced adsorbents for thermally-driven atmospheric water harvesting system in diverse climatic conditions

IF 3.5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2025-06-10 DOI:10.1016/j.ijrefrig.2025.06.012

Muhammad Sultan , Aïssa Rezzoug , Muhammad Aleem

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引用次数: 0

Abstract

In the context of freshwater scarcity, the current research aims to evaluate silica-gel, zeolite, ionogel, and metal-organic framework (MOF) based four types of advanced adsorbents for thermally-driven adsorption-based atmospheric water harvesting (AWH) system. Thermodynamic modeling framework is executed for performance evaluation of studied adsorbents by means of water production potential (WPP), energy consumption (EC), and thermal efficiency (TE) with respect to different operating conditions like ambient/adsorption temperature (T_amb/ads)/relative humidity (RH_amb/ads) and desorption T (T_des)/RH (RH_des). According to results, ionogel and MOF-based adsorbents observed maximum WPP of 1.28 kg/kg/cycle and 0.95 kg/kg/cycle, respectively at T_amb/ads of 25 °C, T_des of 100 °C and RH_des of 20 %. Consequently, the EC computed as 4350.91 kJ/kg/cycle and 4650.67 kJ/kg/cycle with TE of 0.52 and 0.49, respectively. Keeping in view optimized operating conditions, the studied adsorbents are further evaluated for five major cities of Pakistan and South Africa having diverse climatic conditions (arid, semi-arid and humid subtropical). Average WPP of 7.10 L/kg/day and 19.85 L/kg/day is observed by ionogel and MOF, respectively throughout the year with EC of 4647.49 kJ/kg/cycle, and 4331.86 kJ/kg/cycle as well as TE of 0.49 and 0.51, respectively. This research underscores feasibility of advanced adsorbents in diverse climatic conditions from thermodynamic point of view and presents valuable insights on integrating low-grade thermal energy options for the AWH systems. Moreover, the integration of AWH systems could be a potential option in building façades and green roofs for water-resilient urban development in water stressed regions.

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不同气候条件下热驱动大气集水系统高级吸附剂的热力学评价

在淡水资源稀缺的背景下，本研究旨在评估基于硅胶、沸石、离子凝胶和金属有机框架（MOF）的四种高级吸附剂在热驱动吸附型大气集水（AWH）系统中的应用。在不同的操作条件下，如环境/吸附温度(Tamb/ads)/相对湿度（RHamb/ads）和解吸T (Tdes)/RH (RHdes)，通过产水潜力（WPP）、能耗（EC）和热效率（TE），执行热力学建模框架，对所研究的吸附剂进行性能评估。结果表明，离子凝胶和mof基吸附剂在Tamb/ads为25℃、Tdes为100℃、RHdes为20%时的最大WPP分别为1.28 kg/kg/cycle和0.95 kg/kg/cycle。因此，EC计算为4350.91 kJ/kg/cycle和4650.67 kJ/kg/cycle， TE分别为0.52和0.49。考虑到优化后的操作条件，对所研究的吸附剂在巴基斯坦和南非五个主要城市的不同气候条件下（干旱、半干旱和亚热带湿润）进行了进一步的评价。电离凝胶和MOF观测到的全年平均WPP分别为7.10 L/kg/day和19.85 L/kg/day， EC为4647.49 kJ/kg/cycle, 4331.86 kJ/kg/cycle， TE分别为0.49和0.51。从热力学的角度来看，这项研究强调了先进吸附剂在不同气候条件下的可行性，并为AWH系统集成低品位热能选项提供了有价值的见解。此外，在水资源紧张地区，水资源弹性城市发展中，水暖系统的整合可能是建造庭院和绿色屋顶的潜在选择。

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来源期刊

International Journal of Refrigeration-revue Internationale Du Froid 工程技术-工程：机械

CiteScore

7.30

自引率

12.80%

发文量

363

审稿时长

3.7 months

期刊介绍： The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.