Advances in atmospheric water generation technologies

Raveesh, G.; Goyal, Rahul; Tyagi, S. K.

doi:10.1016/j.enconman.2021.114226

Cited by 60 publications

(27 citation statements)

References 120 publications

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“…Desiccants function via adsorption of water vapor on a hydrophilic porous adsorbent, absorption in a hygroscopic medium, or a combination of both ( Xu et al., 2020 ; Kim et al., 2018 ). There is significant progress in desiccant materials development for capturing water vapor, and remarkably high adsorption capacities at low relative humidity have been reported ( Tu et al., 2018 ; Peeters et al., 2020 ; Akbar Salehi et al., 2020 ; Jarimi et al., 2020 ; Raveesh et al., 2021 ; Xu et al., 2020 ; Kallenberger and Fröba, 2018 ; Kim et al., 2017 ; Hanikel et al., 2019 ; Li et al., 2018 ; Sleiti et al., 2021 ; Asim et al., 2021 ; Entezari et al., 2020 ; Ejeian et al., 2020 ; Wang et al., 2021 ). Recovery of the captured water is achieved by thermal evacuation of the water in vapor state from the desiccant material.…”

Section: Water-from-air Technologies Involving Three Water Phase Transitionsmentioning

confidence: 99%

“…A specific water yield of 0.84 L/kWh was achieved by using an efficient heater in an active desiccant-based water harvesting cycle working more efficiently than solar heating ( Wang et al., 2017 ). In addition, improvements in device design to reduce heat losses, adoption of latent heat recovery measures, and thermally insulating the condensation surfaces are beneficial for improving the overall efficiency ( Tu et al., 2018 ; Peeters et al., 2020 ; Raveesh et al., 2021 ; Li et al., 2018 , 2020 ; LaPotin et al., 2021 ; Hua et al., 2021 ). The desiccant choice and system configuration play a key role in achieving high water output at high energy efficiency and low cost.…”

Section: Water-from-air Technologies Involving Three Water Phase Transitionsmentioning

confidence: 99%

“…Water can be provided to various industries and sectors with water-from-air technologies, provided that the specific water yield is higher than the water consumption for the production of the energy needed for the water capturing process. In addition to the direct implementation of these technologies for capturing atmospheric water, fresh water can be produced as a side product of, e.g., heating, ventilation, and air conditioning (HVAC) systems ( Raveesh et al., 2021 ; Magrini et al., 2017 ). Approximately 40% of the evaporated water from cooling towers can easily be captured with fog collection mesh structures ( Raveesh et al., 2021 ; Ghosh et al., 2015 ).…”

Section: Atmospheric Water Harvesting and The Local Water-energy Nexusmentioning

confidence: 99%

“…Water vapor present in the air is a water resource that is available everywhere on the planet and is currently hardly exploited. Regions affected by drought and adverse climate change may consider capturing water vapor from the air for fresh water production ( Gad et al., 2001 ; Tu et al., 2018 ; Peeters et al., 2020 ; Akbar Salehi et al., 2020 ; Jarimi et al., 2020 ; Raveesh et al., 2021 ). Dew harvesting, fog collection, active air cooling, and desiccant-based water harvesting are the main water harvesting technologies.…”

Section: Introductionmentioning

confidence: 99%

“…Dew harvesting, fog collection, active air cooling, and desiccant-based water harvesting are the main water harvesting technologies. Especially the development of superior desiccants for designing such decentralized water vapor capturing systems is receiving lots of interest in the academic world ( Tu et al., 2018 ; Peeters et al., 2020 ; Akbar Salehi et al., 2020 ; Jarimi et al., 2020 ; Raveesh et al., 2021 ). Efficient desiccants have been proposed, like metal-organic framework MIL-101 with LiCl, MOF-801, MOF-303, and alginate gel with CaCl 2 ( Xu et al., 2020 ; Kallenberger and Fröba, 2018 ; Kim et al., 2017 ; Hanikel et al., 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Fresh water production from atmospheric air: Technology and innovation outlook

et al. 2021

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Summary Capturing water vapor from atmospheric air is a possible solution to local water scarcity, but it is very energy demanding. Energy consumption estimates of water-from-air technologies involving adsorption processes, thermo-responsive hydrophilicity switching polymers, air cooling processes, and reverse osmosis of deliquescent salt solutions reveal that these technologies are not competitive when compared with seawater desalination, and the use of fresh water and wastewater sources. They only become a viable option in the absence of local liquid water sources and when long-distance transport for socio-economic reasons is not an option. Of interest, direct solar-driven technology for water-from-air production is an attractive means to disentangle the local water-energy nexus. It is expected that climate change will accelerate the introduction of water-from-air technologies in local water supply schemes. The optimal water-from-air technology depends on the climate, relative humidity, and temperature profiles. A world map is presented, indicating the optimal geographic location for each technology.

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Section: Water-from-air Technologies Involving Three Water Phase Transitionsmentioning

confidence: 99%

Section: Water-from-air Technologies Involving Three Water Phase Transitionsmentioning

confidence: 99%

Section: Atmospheric Water Harvesting and The Local Water-energy Nexusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fresh water production from atmospheric air: Technology and innovation outlook

et al. 2021

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Harvesting of Atmospheric Water Using Polymer‐Based Hybrid Hydrogels

Abdulbakee Muhammed,

Shahadat,

Tweib

et al. 2023

ChemBioEng Reviews

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Atmospheric water harvesting (AWH) is an important parallel or supplemental freshwater production technique to liquid water resource‐based technologies due to the availability of moisture resources regardless of location and the possibility of realizing decentralized applications. Recent developments to regulate the characteristic features and nanostructures of moisture‐harvesting materials demonstrate new opportunities to improve device efficiency. Focusing on the design of water harvesting materials and the optimization of the overall system, this review sums up the most recent developments in this area and presents prospects for the future development of AWH. An overview of the processes involved in water sorption by various sorbents and the characteristics and functionality of the polyaniline‐based hydrogels developed for AWH is given. Newly reported hydrogel sorbents used for AWH are evaluated, focusing on their benefits, drawbacks, and design methodologies. Several AWH‐specific water harvesters are described and the impact of the system's mass and heat transfer on its operational effectiveness is explored. Finally, potential roadmaps for the development of this technology are detailed and the challenges in this subject from both a basic research and practical application perspective are discussed.

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A Biomass‐Based Hydrogel Evaporator Modified Through Dynamic Regulation of Water Molecules: Highly Efficient and Cost‐Effective

Luo

Wen

Wang

et al. 2022

Energy & Environ Materials

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Solar‐driven hydrogel evaporator used for water purification demonstrates great potential in seawater desalination and domestic sewage treatment. However, much uncertainty still exists about the most efficient design to obtain cost‐effective drinkable water. In this paper, a natural rich biomass Nicandra physalodes (Linn.) Gaertn. polysaccharide was introduced into the polyvinyl alcohol network to control the water distribution during evaporation and build a low‐cost hybrid hydrogel solar evaporator with a total material cost of $7.95 m−2. The mixed evaporator works stably in a long‐span acid–base range (pH 1–14) and salinity range (0–320 g kg−1). Its daily water purification capacity can reach 24.4 kg m−2 with a water purification capacity of 3.51 kg m−2 h−1 under sunlight. This paper provides a new possibility for a highly efficient and cost‐effective water desalination system with guaranteed water quality by focusing on the dynamic regulation of water molecules at the evaporation interface.

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Advances in atmospheric water generation technologies

Cited by 60 publications

References 120 publications

Fresh water production from atmospheric air: Technology and innovation outlook

Fresh water production from atmospheric air: Technology and innovation outlook

Harvesting of Atmospheric Water Using Polymer‐Based Hybrid Hydrogels

A Biomass‐Based Hydrogel Evaporator Modified Through Dynamic Regulation of Water Molecules: Highly Efficient and Cost‐Effective

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