A novel spectral-splitting solar indoor lighting system with reflective direct-absorption cavity: Optical and thermal performance investigating

文献类型： 外文期刊

第一作者： Ji, Yaning

作者： Ji, Yaning;Yuan, Yu;Wu, Gang;Feng, Chaoqing;Cheng, Ruifeng;Ma, Qianlei;Chen, Xinge;Tong, Yuxin;Ji, Yaning;Feng, Chaoqing;Chen, Xinge;Yuan, Yu;Wu, Gang;Cheng, Ruifeng;Ma, Qianlei;Tong, Yuxin

作者机构：

关键词： Solar energy; Plant Factory; Spectral-splitting; Reflective direct-absorption cavity; Cooling

期刊名称：ENERGY CONVERSION AND MANAGEMENT （ 影响因子：11.533； 五年影响因子：10.818 ）

ISSN： 0196-8904

年卷期： 2022 年 266 卷

页码：

收录情况： SCI

摘要： Sunlight contains a wide range of the spectrum, and the spectrum used for plant photosynthesis is mainly located in the visible band (380-780 nm), while the spectral energy of other bands is not suitable for plant growth because it generates heat in summer. In this paper, a novel spectral-splitting solar indoor lighting system with a reflective direct-absorption cavity for Plant Factory was developed, which used the combination of pure water and spectrum splitting mirrors to perfectly separate the visible light and non-visible light of sunlight. Visible light was conducted to Plant Factory by optical fiber to provide illumination for plants, and non-visible light was trapped and then absorbed by a reflective direct-absorption cavity and convert into thermal energy. The structural parameters of the reflective direct-absorption cavity were optimized based on the Monte Carlo method, and the light conduction and heat transfer models were established to analyze the photo-thermal performance of the device. The results of indoor and outdoor tests showed that the solar energy utilization efficiency of the device could reach 50%, among which the light transmission efficiency and heat collection efficiency were 24.7% and 25.3%, respectively. The temperature of the optical fiber coupling end face was kept in the range of 27-37 degrees C, which can ensure the safe and efficient operation of the optical fiber. It provides a new idea for the protection of optical fiber, the efficiency improvement of sunlight conduction lighting technologies, and the energy saving of the Plant Factory lighting in the future.

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