High performance of carbon-particle/bulk-wood bi-layer system for solar steam generation
High performance of carbon-particle/bulk-wood bi-layer system for solar steam generation
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DOI：
10.1002/er.4239
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发表时间：
2018-12-01
影响因子：
4.6
通讯作者：
Zhong, Jinxin
中科院分区：
文献类型：
--
作者：
Luo, Xiao;Huang, Congliang;Zhong, Jinxin
为了缓解淡水短缺问题，双层系统已被广泛应用，以提高太阳能蒸汽发电的效率。在目前的工作中，以低成本碳颗粒作为光吸收层和黄杨木作为支撑层获得了双层系统（C-wood）。木材的应用可以在系统中带来良好的水传输和良好的局部热管理，并且碳颗粒可以在较宽的光吸收波段（大多大于98％）提供高光吸收率，这是由宽尺寸分布的碳颗粒形成的复杂的三维多孔结构造成的。由于同时具有高光吸收率、良好的水传输和良好的局部热管理，C-wood系统在1太阳的光照功率下具有65%的蒸发效率。该系统对于未来的行业应用也很耐用。将 C-wood 系统在蒸发过程中的能量损失与本工作中制备的其他系统的能量损失进行比较，我们得出结论，C-wood 系统的低顶面光反射应该是高蒸发效率的原因。它表明碳颗粒是一种很有前景的材料，可用于太阳能蒸汽发电系统，因为其资源易于获取、成本低廉且具有有效的光吸收率。
To relieve the fresh water shortage, bi-layer systems have been widely applied to give high efficiencies of solar steam generation. In current work, a bi-layer system (C-wood) is obtained with the low-cost carbon particles as the light absorbing layer and the boxwood as the supporting layer. The application of wood could lead to both good water transportation and good local heat management in the system, and carbon particles could supply a high light absorptivity at a broad optical absorption wave bands (mostly larger than 98%), which results from the complex three-dimensional porous structure formed by the wide-size-distribution carbon particles. Because simultaneously possessing a high light absorptivity, good water transportation, and good local heat management, the C-wood system gives a 65% evaporation efficiency under an illumination power of 1 sun. This system is also durable for a future industry applications. Comparing the energy loss of the C-wood system in the evaporation process with the ones of other systems prepared in this work, we conclude that a low top-surface reflection of light of the C-wood system should be responsible for the high evaporation efficiency. It demonstrates that the carbon particle is a promising material for an application in solar steam generation systems for easily accessible resources, low cost, and effective light absorptivity.