期刊
NANO ENERGY
卷 28, 期 -, 页码 397-406出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2016.08.011
关键词
Nanoparticle; Steam generation; Nanobubble; Solar energy; Volumetric receiver
类别
资金
- National Science Foundation of China [51228601]
- EU Marie Curie Actions-International Incoming Fellowships [FP7-PEOPLE-2013-IIF-626576]
- China Scholarship Council (CSC) [201506020031]
- Iraqi Ministry of Higher Education and Scientific Research [2001]
Steam production is essential for a wide range of applications, and currently there is still strong debate if steam could be generated on top of heated nanoparticles in a solar receiver. We performed steam generation experiments for different concentrations of gold nanoparticles dispersions in a cylindrical receiver under focused natural sunlight of 220 Suns. Combined with mathematical modelling, it is found that the initial stage of steam generation is mainly caused by localized boiling and vaporization in the superheated region due to highly non-uniform temperature and radiation energy distribution, albeit the bulk fluid is still subcooled. Such a phenomenon can be well explained by the classical heat transfer theory, and the hypothesized 'nanobubble', i.e., steam produced around the heated nanoparticles, is unlikely to occur under normal solar concentrations. For future solar receiver design, attention should be paid to focus and trap more solar energy at the superheated region while minimizing the temperature rise of the bulk fluid. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据