Ultra-high evaporation rate 3D evaporator with vertical sheets based on full use of convection flow

Peng, Lihua; Gu, Xiaobin; Yang, Haibin; Zheng, Dapeng; Wang, Pizhuang; Cui, Hongzhi

doi:10.1016/j.jclepro.2022.131172

Cited by 11 publications

(7 citation statements)

References 45 publications

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“…These evaporators have reached evaporation rates from 10 to almost 30 kg m − 2 h −1 . [ 22 , 27 , 37 , 60 ] Liquid transfer processes in evaporation systems can be accelerated utilising convective flow by applying wind between 2–6 ms −1 on the evaporation surface. These speeds are categorized as a light‐ to moderate breeze according to the Beaufort Wind Scale [ 61 ] and is often accessible in urban regions and readily accessible in the proximity of coastal areas.…”

Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

“…A 3D vertical evaporator was fabricated using commercially available black cloth composed of pure cotton and a 3D printed nylon (PA200) frame (Figure 5B ). [ 60b ] The black fabric was arranged in a vertical orientation with uniform gaps between each piece. Performance was assessed using various quantities of fabric (ranging from 1 to 6 pieces) and different spacings between them (ranging from 4 to 20 mm).…”

Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

See 3 more Smart Citations

Recent Advances in High‐Rate Solar‐Driven Interfacial Evaporation

Kim,

Philip,

McDonagh

et al. 2024

Advanced Science

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Recent advances in solar‐driven interfacial evaporation (SDIE) have led to high evaporation rates that open promising avenues for practical utilization in freshwater production and industrial application for pollutant and nutrient concentration, and resource recovery. Breakthroughs in overcoming the theoretical limitation of 2D interfacial evaporation have allowed for developing systems with high evaporation rates. This study presents a comprehensive review of various evaporator designs that have achieved pure evaporation rates beyond 4 kg m−2 h−1, including structural and material designs allowing for rapid evaporation, passive 3D designs, and systems coupled with alternative energy sources of wind and joule heating. The operational mechanisms for each design are outlined together with discussion on the current benefits and areas for improvement. The overarching challenges encountered by SDIE concerning the feasibility of direct integration into contemporary practical settings are assessed, and issues relating to sustaining elevated evaporation rates under diverse environmental conditions are addressed.

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Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

Section: Evaporation Rate Beyond the 2d Theoretical Limitmentioning

confidence: 99%

See 2 more Smart Citations

Recent Advances in High‐Rate Solar‐Driven Interfacial Evaporation

Kim,

Philip,

McDonagh

et al. 2024

Advanced Science

View full text Add to dashboard Cite

show abstract

“…However, limited to high heat loss and low space volume utilization, the evaporation rate and efficiency of most block evaporators and membrane materials still have much room to improve. [27][28][29][30][31] In this respect, 3D solardriven interfacial evaporation devices have shown great potential. 3D evaporators are usually designed by increasing lateral area and adding space geometry on the basis of traditional planar evaporation interface.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient 3D Evaporator for Interfacial Solar Steam Generation and Wastewater Treatment

Zhao,

You,

Chen

et al. 2023

Energy Tech

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Solar‐driven interfacial evaporation is one of the means to effectively alleviate the global shortage of freshwater resources without the need for additional energy supply. Although the emergence of various evaporators has improved the evaporation rate and efficiency, it still needs further efforts in terms of improving space utilization, reducing material waste, and enhancing salt resistance. Herein, a 3D bridge evaporator H1.68MoO3/MS (MS, melamine sponge) is designed, where H1.68MoO3 and MS endow the evaporator with high light absorption in the whole wavelength range and excellent water transport capability, respectively. The support of expanded polystyrene realizes the self‐floating of the device, and the evaporation interface is arched upward and exposed to the air in a bridge shape, effectively improving the space volume utilization rate, reducing material consumption and reducing the heat loss during the evaporation process. Under the sunlight intensity of 1 kW m−2, the evaporator achieves an evaporation rate of 2.75 kg m−2 h−1 and an evaporation efficiency of 167.0%, meanwhile showing excellent resistance to salt deposition and ability to remove heavy metals and dyes (removal efficiency over 99%). In addition, the evaporation performance of the evaporator remains stable in the evaporation experiment lasting for 10 days, showing good long‐term usability.

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Can the Interfacial Solar Vapor Generation Performance Be Really “Beyond” Theoretical Limit?

Nawaz,

Yang,

Zhao

et al. 2024

Advanced Energy Materials

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The interfacial solar vapor generation (ISVG) process is an environmentally friendly approach that utilizes solar to produce steam, which can solve the water shortage. Despite many previous research studies, claims beyond the theoretical limit have risen due to limitations in the efficiency of converting solar to vapor and the rate of solar evaporation, which are still being debated. Energy losses remain even under ideal conditions, which means that the efficiency of the system will never be ≥100%. This review primarily analyzes the theoretical values of evaporation rate and energy efficiency in the ISVG process. Utilizing a theoretical formula for energy distribution, the factors contributing to the current exceedance of conversion efficiency and evaporation rate are scrutinized. By examining various strategies, such as the reduction of vaporization enthalpy for photothermal materials and the utilization of environmental energy for evaporation, these studies seek to enhance evaporation efficiencies, but they ignore the problem of the theoretical limit of evaporation. Therefore, this review emphasizes misconceptions about efficiencies beyond theoretical limits and aims to guide researchers to provide plausible explanations for such breakthroughs under specific conditions, alongside established reference conditions. Ultimately, this study lays a solid theoretical foundation for practical solar water purification.

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Ultra-high evaporation rate 3D evaporator with vertical sheets based on full use of convection flow

Cited by 11 publications

References 45 publications

Recent Advances in High‐Rate Solar‐Driven Interfacial Evaporation

Recent Advances in High‐Rate Solar‐Driven Interfacial Evaporation

Highly Efficient 3D Evaporator for Interfacial Solar Steam Generation and Wastewater Treatment

Can the Interfacial Solar Vapor Generation Performance Be Really “Beyond” Theoretical Limit?

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