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首页> 外文期刊>Energy Conversion & Management >Direct vapor generation through localized solar heating via carbon-nanotube nanofluid
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Direct vapor generation through localized solar heating via carbon-nanotube nanofluid

机译：通过碳纳米管纳米流体通过局部太阳能加热直接产生蒸气

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摘要

Traditional solar-energy collection systems experience high thermal losses because of the high surface temperature of the absorber. Nanofluid developments have led to extensive studies on their suitability for direct absorption as solar-energy collectors. A potential approach for solar steam generation via nanoparticle absorption of solar light and its conversion to thermal energy for water evaporation has been introduced recently. Direct solar vapor generation enabled by carbon-nanotube nanofluids was investigated experimentally in the present work. The effects of solar-power density and carbonnanotube concentration on solar steam-generation performance are discussed. The evaporation rate increases with an increase in solar power and carbon-nanotube concentration. A high evaporation efficiency (46.8%) was obtained with a 19.04 x 10(-4) vol.% carbon-nanotube nanofluid under a solar illumination power of 10 Sun (1 Sun =1 kW m(-2)). A high evaporation rate was achieved by localized heating of the nanofluid rather than by a bulk temperature increase, which provides a mechanism for low temperature solar vapor generation and exhibits broad solar-energy applications such as seawater desalination, waste sterilization and power generation. (C) 2016 Elsevier Ltd. All rights reserved.
机译：由于吸收器的高表面温度，传统的太阳能收集系统遭受高的热损失。纳米流体的发展已导致对其作为太阳能收集器直接吸收的适用性进行了广泛的研究。最近已经引入了一种潜在的方法，该方法通过吸收太阳光的纳米粒子产生太阳能蒸汽并将其转化为热能以进行水蒸发。在本工作中，通过实验研究了由碳纳米管纳米流体促成的直接太阳蒸气的产生。讨论了太阳能功率密度和碳纳米管浓度对太阳能蒸汽产生性能的影响。蒸发速率随着太阳能和碳纳米管浓度的增加而增加。在太阳光功率为10 Sun（1 Sun = 1 kW m（-2））的情况下，使用19.04 x 10（-4）％（体积）的碳纳米管纳米流体可获得高蒸发效率（46.8％）。通过局部加热纳米流体而不是通过整体温度升高来实现高蒸发速率，这提供了一种低温太阳能蒸气产生的机理，并展现了广泛的太阳能应用，例如海水淡化，废物灭菌和发电。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Energy Conversion & Management》 |2016年第15期|176-183|共8页
  • 作者

    Wang Xinzhi; He Yurong; Cheng Gong; Shi Lei; Liu Xing; Zhu Jiaqi;

  • 作者单位

    Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Astronaut, Ctr Composite Mat & Struct, Harbin 150001, Peoples R China;

    Harbin Inst Technol, Sch Astronaut, Ctr Composite Mat & Struct, Harbin 150001, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solar energy; Vapor generation; Localized heating; Nanofluid; Carbon nanotubes;

    机译：太阳能;蒸气产生;局部加热;纳米流体;碳纳米管;

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