对跟踪精度要求高是限制太阳能聚光集热器规模化应用的因素之一,为此对一种新型非追日槽式复合多曲面聚光集热器光热性能进行光学仿真和测试分析,利用TracePro软件模拟研究入射偏角对该聚光器光学性能的影响,并在实际天气下测试分析运行工况对该聚光器接收体出口温度、瞬时集热量等热性能的影响,同时分析玻璃盖板对减小该聚光器散热损失的作用,结果表明：对应实际运行情况,该聚光器的光线接收率与聚光效率均随时间的延长先增大后减小,且在光线正入射时达到最大值,分别为96.00%与72.69%。当空气流速为3.1 m/s时,聚光器接收体出口空气温度、瞬时集热量与太阳辐照度的变化趋势一致,在晴天运行时的平均值分别为43 ℃与448.3 W,分别比多云天时增加4.4 ℃和53.1 W,且该聚光器在晴天运行时的平均光热转化效率为50.5%。此外,敷设玻璃盖板的聚光器运行时散热温差比未敷设玻璃盖板时降低19.3 ℃,研究结果可为非追日复合多曲面聚光器的应用提供参考。
Abstract
Accurate tracking system is one of the factors that limit the distributed application of solar concentrator. Therefore, In this paper, optical simulation and experimental test of a novel non-tracking trough compound parabolic concentrator. Firstly, the variation of the optical performance of the CPC with the incidence angle was simulated by using the optical software TracePro. Under actual conditions, the influence of operating conditions on the thermal characteristics of the concentrator such as outlet temperature and instantaneous heat collection was tested and analyzed, and the effect of glass cover plate on reducing the heat loss of the concentrator is also analyzed. The outcomes manifested that, corresponding actual operation, the overall ray’s receiving rate and concentrating efficiency of the concentrator increase first and then decrease with the operation time, and their maximum values are 96.00% and 72.69% at normal incidence, respectively. At air flow rate is 3.1 m/s, the variation trend of the outlet temperature, instantaneous heat collection with operation time is consistent with the trend of solar radiation, and the average values are 43 ℃ and 448.3 W in sunny days, which are 4.4 ℃ and 53.1 W higher than those in cloudy days, respectively. Furthermore, the average photothermal conversion efficiency of the concentrator in sunny days is 50.5%, and the heat dissipation temperature difference with cover is 19.3 ℃ lower than that without the glass cover. The research results can provide reference for the application of non-tracking compound parabolic concentrator.
关键词
太阳能 /
聚光 /
集热 /
复合多曲面 /
性能 /
槽式
Key words
solar energy /
concentration /
heating /
compound parabolic /
performance /
trough
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基金
国家自然科学基金（51966012）; 内蒙古自治区重点研发和成果转化计划（2022YFXZ0021）; 中央引导地方科技发展资金项目（2022ZY0085）; 呼伦贝尔市“科技兴市”行动重点专项（成果转化）项目（2022HZZX004）
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