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A spectral splitting solar concentrator for cascading solar energy utilization by integrating photovoltaics and solar thermal fuel

机译:一种光谱分裂太阳能聚光器,用于通过整合光伏和太阳能热燃料级联太阳能利用

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Full-spectrum solar energy utilization has drawn widespread attention for cascading solar energy utilization. The hybrid approach integrating photovoltaic generation and solar thermochemical reaction is attractive to convert full-spectrum solar energy into electricity and chemical energy. This paper proposes a concentrating solar photovoltaic/thermochemical hybrid system. Meanwhile, a spectral splitting concentrator is proposed and designed. The proposed concentrator consists of above-mirror and sub-mirror. The above-mirror enables the visible spectrum to be concentrated onto photovoltaics. The sub-mirror allows the infrared and ultraviolet spectra to be concentrated onto a solar thermochemical reactor. The design methodology based on ray tracing is described. The distribution of solar radiation on the photovoltaics and the thermochemical reactor is made analysis. The results show that solar radiation can be uniformly cast to the photovoltaic surface without using secondary optical element; the common solar flux concentration of thermochemical reactor is also mitigated. The proposed spectral splitting concentrator is introduced in the hybrid system. The total conversion efficiency of the solar energy can exceed 20%. Compared with individual photovoltaic electricity and solar thermal fuel, this hybrid system has the potential to increase the conversion efficiency of solar energy into both electricity and fuel, with greater than 5% absolute enhancement. The design of the spectral splitting concentrator provides the possibility of cascading utilization of full-spectrum solar energy.
机译:全频率太阳能利用率已经引起广泛关注级联太阳能利用。整合光伏发电和太阳能热化学反应的混合方法是有吸引力的,使全谱太阳能转化为电力和化学能。本文提出了一种浓缩太阳能光伏/热化学混合系统。同时,提出并设计了一种光谱分裂浓缩器。所提出的集中器由上镜和子镜子组成。上述镜子使得可见光谱能够集中在光伏中。副镜允许红外和紫外光谱集中在太阳能热化学反应器上。描述了基于射线跟踪的设计方法。对光伏辐射的分布和热化学反应器进行分析。结果表明,在不使用二次光学元件的情况下,可以将太阳辐射均匀地铸造到光伏表面;还减轻了热化学反应器的普通太阳能通量浓度。在混合系统中引入了所提出的光谱分离浓缩器。太阳能的总转换效率超过20%。与单独的光电电和太阳能热燃料相比,该混合系统具有将太阳能转换为电力和燃料的转换效率,绝对增强的5%。光谱分离集中器的设计提供了级联利用全谱太阳能的可能性。

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