Experimental study on condensation flow patterns and heat transfer characteristics of non-azeotropic and immiscible binary mixed vapors

Zhang, Weilong; Cheng, Min; Chen, Yuxuan; Zhu, Xun; Liu, Qiang

doi:10.1016/j.ijthermalsci.2022.107974

Cited by 7 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The condensed water has a smaller contact area with the surface and less move hysteresis. Moreover, when the water contact angle (WCA) on the condensation surface is greater than 147°, dropwise condensation water can quickly roll off the surface by gravity, achieving rapid heat transfer and subsequent recondensation on the surface. − Therefore, to improve the water collection rate of multistage devices, it is of great significance to construct superhydrophobic condensation surfaces and explore the mass and heat transfer mechanism.…”

Section: Introductionmentioning

confidence: 99%

Solar-Driven Multistage Device Integrating Dropwise Condensation and Guided Water Transport for Efficient Freshwater and Salt Collection

Tian,

Jiang,

Zhu

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

Interfacial solar vapor generation (ISVG) is an emerging technology to alleviate the global freshwater crisis. However, high-cost, low freshwater collection rate, and salt-blockage issues significantly hinder the practical application of solar-driven desalination devices based on ISVG. Herein, with a low-cost copper plate (CP), nonwoven fabric (NWF), and insulating ethylene–vinyl acetate foam (EVA foam), a multistage device is elaborately fabricated for highly efficient simultaneous freshwater and salt collection. In the designed solar-driven device, a superhydrophobic copper plate (SH-CP) serves as the condensation layer, facilitating rapid mass and heat transfer through dropwise condensation. Moreover, the hydrophilic NWF is designed with rational hydrophobic zones and specific high-salinity solution outlets (Design-NWF) to act as the water evaporation layer and facilitate directional salt collection. As a result, the multistage evaporator with eight stages exhibits a high water collection rate of 2.25 kg m–2 h–1 under 1 sun irradiation. In addition, the desalination device based on the eight-stage evaporator obtains a water collection rate of 13.44 kg m–2 and a salt collection rate of 1.77 kg m–2 per day under natural irradiation. More importantly, it can maintain a steady production for 15 days without obvious performance decay. This bifunctional multistage device provides a feasible and efficient approach for simultaneous desalination and solute collection.

show abstract

Section: Introductionmentioning

confidence: 99%