| 摘要: |
| 为了降低复合抛物面聚光器对跟踪精度的要求, 提高其在集热过程中的光热转化能力,探究入射偏角对新型复合抛物面聚光器非跟踪工况时光热性能的影响机制。理论分析该聚光器在集热过程中的能量转化关系,并利用光学仿真软件TracePro研究入射偏角对聚光器光学性能的影响规律；在此基础上搭建非跟踪复合抛物面聚光器性能测试试验台,在实际天气条件下测试分析聚光器光热性能随径向入射偏角的变化规律。结果表明:当光线正入射时,聚光器的光线接收率与聚光效率分别为100%和83.42%；当径向入射偏角α为16°时,该聚光器的光线接收率与聚光效率分别为53.00%和44.82%；当轴向入射偏角β为30°时,光线接收率与聚光效率分别为88.74%和74.42%；在空气流速为3.7 m/s时,聚光器的最高出口温度与瞬时集热量分别为31.3 ℃和782.8 W,分别比聚光器接收上偏10°和下偏10°入射辐射时提高了3.7、6.1 ℃和131.0、217.9 W；该聚光器接收正入射辐射时的平均光热转化效率为77.45%,比接收上偏10°和下偏10°入射辐射的平均光热转化效率高42.14%和52.97%。 |
| 关键词: 太阳能 入射偏角 复合抛物面 非跟踪 聚光 |
| DOI：10.3969/j.issn.1673-5005.2024.02.017 |
| 分类号: |
| 文献标识码:A |
| 基金项目: |
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CHANG Zehui1,2, LIU Xuedong1,2, GUO Ziheng1
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(1.College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;2.Engineering Center of Solar Energy Utilization Technology, Inner Mongolia University of Technology, Hohhot 010051, China)
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| Abstract: |
| In order to reduce the requirement of tracking accuracy of compound parabolic concentrator and improve its photothermal conversion ability during solar heat collection, it is aimed to explore the influence mechanism of the incident angle on the photothermal performance of the novel compound parabolic concentrator under non-tracking conditions. Firstly, the energy conversion relationship of the concentrator in the heat collection process was analyzed theoretically, and the influence of incident angle on the optical performance of the concentrator was probed with the optical software TracePro. Based on this work, a testing bench for the performance of non-tracking compound parabolic concentrator was built, and the photothermal performance of the concentrator with respect to the radial incidence angle was tested and analyzed under actual weather conditions. The results indicate that the optical performance of the concentrator is the best when the incident angle is 0°, the overall ray 's receiving rate and concentrating efficiency are 100 % and 83.42 %, respectively. When the radial incident angle is 16°, the overall ray 's receiving rate and concentrating efficiency of the concentrator are 53.00 % and 44.82 %, respectively, and these two parameters are 88.74 % and 74.42 % when the axial incident angle is 30 °, respectively. When the air velocity is 3.7 m/s, the maximum outlet temperature and instantaneous solar heat collection of the concentrator receiving normal solar radiation are 31.3 ℃ and 782.8 W, respectively, which are 3.7 ℃ and 6.1 ℃ respectively, and 131.0 W and 217.9 W respectively higher than those of the concentrator receiving solar radiation with radial incident angle of +10° and -10°. In addition, the average photothermal conversion efficiency of the concentrator receiving normal incident radiation is 77.45 %, which is 42.14 % and 52.97 % higher than that receiving +10° and -10°incident radiation. |
| Key words: solar energy incident angle compound parabolic non-tracking concentration |
