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Efficient Interfacial Solar Steam Generator with Controlled Macromorphology Derived from Flour via “Dough Figurine” Technology
Author(s) -
Li Zhengtong,
Wang Chengbing,
Li Zeyu,
Deng Lin,
Su Jinbu,
Shi Jing,
An Meng
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900406
Subject(s) - desalination , materials science , generator (circuit theory) , process engineering , power (physics) , engineering , chemistry , physics , quantum mechanics , biochemistry , membrane
A solar‐driven interface steam generator (SISG) has potential applications in saline water desalination and polluted water purification. A shape‐ and size‐controlled, low‐cost, eco‐friendly solar‐absorber material is urgently desired for practical applications of SISGs. Herein, a facile, sustainable, and scalable approach is proposed to produce tailored SISGs with controlled macromorphology derived from flour via “dough figurine” technology originating from the China Han Dynasty. Three kinds of self‐floated flour‐based absorbers, i.e., near‐cylindrical (integrated), near‐spherical (loose packing), and powdery (dense packing) absorber used as SISGs, are discussed. More importantly, it is found that the macromorphology significantly influences water transport and interfacial thermal management of SISGs; thus the integrated absorber has an obvious advantage over the other two absorbers, which possesses a high evaporation efficiency of 71.9% at normal solar illumination. The proposed “dough figurine” technology breaks the limitations of the inherent geometry of reported biomass‐based SISGs, which provides an important guidance for SISG use in remote and impoverished areas.