High-Efficiency Solar Vapor Generation Boosted by a Solar-Induced Updraft with Biomimetic 3D Structures

Changwook Kim; Dongheok Shin; Monu Nath Baitha; Yunha Ryu; Augustine M. Urbas; Wounjhang Park; Kyoungsik Kim

doi:10.1021/acsami.1c05883

High-Efficiency Solar Vapor Generation Boosted by a Solar-Induced Updraft with Biomimetic 3D Structures

Changwook Kim, Dongheok Shin, Monu Nath Baitha, Yunha Ryu, Augustine M. Urbas, Wounjhang Park, Kyoungsik Kim

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Sunlight-based desalination is one of the most environment-friendly, low-cost methods for obtaining freshwater on the planet. We implemented a biomimetic three-dimensional (3D) solar evaporator, improved by a solar-induced air-flow updraft. A carbon-coated polyvinyl alcohol (PVA) foam allowed us to achieve perfect absorption of ultrabroadband sunlight and continuously provide water to tall 3D structures. Integrating the convection flower (Amorphophallus titanum) and solar chimney structure, we proposed a bio-inspired 3D solar evaporator system that generates an updraft airflow. This updraft replaces saturated vapor between neighboring PVA foams with dry air, resulting in a significant increase in the effectiveness of dry air-water contact interfaces. Under the 1 sun condition (1 kW m-2), we achieve a high solar-vapor conversion efficiency of 95.9%.

Original language	English
Pages (from-to)	29602-29611
Number of pages	10
Journal	ACS Applied Materials and Interfaces
Volume	13
Issue number	25
DOIs	https://doi.org/10.1021/acsami.1c05883
Publication status	Published - 2021 Jun 30

Bibliographical note

Funding Information:
This research was supported by the Yonsei Engineering Mid-career Professor Grant (2019) and Yonsei University Research Fund of 2020-22-0077.

Publisher Copyright:
© 2021 American Chemical Society.

All Science Journal Classification (ASJC) codes

Materials Science(all)

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10.1021/acsami.1c05883

Cite this

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title = "High-Efficiency Solar Vapor Generation Boosted by a Solar-Induced Updraft with Biomimetic 3D Structures",

abstract = "Sunlight-based desalination is one of the most environment-friendly, low-cost methods for obtaining freshwater on the planet. We implemented a biomimetic three-dimensional (3D) solar evaporator, improved by a solar-induced air-flow updraft. A carbon-coated polyvinyl alcohol (PVA) foam allowed us to achieve perfect absorption of ultrabroadband sunlight and continuously provide water to tall 3D structures. Integrating the convection flower (Amorphophallus titanum) and solar chimney structure, we proposed a bio-inspired 3D solar evaporator system that generates an updraft airflow. This updraft replaces saturated vapor between neighboring PVA foams with dry air, resulting in a significant increase in the effectiveness of dry air-water contact interfaces. Under the 1 sun condition (1 kW m-2), we achieve a high solar-vapor conversion efficiency of 95.9%.",

author = "Changwook Kim and Dongheok Shin and Baitha, {Monu Nath} and Yunha Ryu and Urbas, {Augustine M.} and Wounjhang Park and Kyoungsik Kim",

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AU - Ryu, Yunha

AU - Urbas, Augustine M.

AU - Park, Wounjhang

AU - Kim, Kyoungsik

N1 - Funding Information: This research was supported by the Yonsei Engineering Mid-career Professor Grant (2019) and Yonsei University Research Fund of 2020-22-0077. Publisher Copyright: © 2021 American Chemical Society.

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AB - Sunlight-based desalination is one of the most environment-friendly, low-cost methods for obtaining freshwater on the planet. We implemented a biomimetic three-dimensional (3D) solar evaporator, improved by a solar-induced air-flow updraft. A carbon-coated polyvinyl alcohol (PVA) foam allowed us to achieve perfect absorption of ultrabroadband sunlight and continuously provide water to tall 3D structures. Integrating the convection flower (Amorphophallus titanum) and solar chimney structure, we proposed a bio-inspired 3D solar evaporator system that generates an updraft airflow. This updraft replaces saturated vapor between neighboring PVA foams with dry air, resulting in a significant increase in the effectiveness of dry air-water contact interfaces. Under the 1 sun condition (1 kW m-2), we achieve a high solar-vapor conversion efficiency of 95.9%.

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High-Efficiency Solar Vapor Generation Boosted by a Solar-Induced Updraft with Biomimetic 3D Structures

Abstract

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