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Solar-driven high-temperature steam generation at ambient pressure

Progress in Natural Science:Materials International 2019年第1期29卷 10-15页

作者： Xinyu Wang Yanming Liu Rui Feng Yao Zhang Chao Chang Benwei Fu Tian Luan Peng Tao Wen Shang Jianbo Wu Chengyi Song Tao Deng State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University

This paper demonstrates a facile solar steam generator for the generation of high-temperature steam at ambient pressure. The steam generator consists of a coiled copper tube(CCT) that serves as both solar collector and vapor heater. Both the inner and outer surfaces of the CCT are coated with black superhydrophobic copper oxide layer to improve the solar absorption, and such superhydrophobic layer prevents the condensation and clogging of water vapor during the heating process. Solar vapor is generated at the inlet of CCT through interfacial evaporation and subsequently heated inside the CCT as the vapor travels from the inlet to the outlet. By employing this approach, steam temperature that exceeds 100℃ under 1-sun illumination is demonstrated. Furthermore,steam temperature could reach as high as 250℃ under 10-sun illumination at ambient pressure. Successful sterilization experiment was also performed in this work to demonstrate the potential application of the high temperature steam generated. Such demonstrated approach helps open up the potential usage of solar-driven interfacial evaporation in applications that involve high-temperature steam, including medical sterilization,chemical manufacturing and food processing.

关键词： High-temperature steam Photothermal conversion materials Solar steam generation Sterilization vapor heating

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