Improved Model for Circumsolar Irradiance Calculation as an Extended Light Source and Spectral Implications for High-Concentration Photovoltaic Devices
Improved Model for Circumsolar Irradiance Calculation as an Extended Light Source and Spectral Implications for High-Concentration Photovoltaic Devices
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DOI：
10.1109/jphotov.2015.2493362
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发表时间：
2016
影响因子：
3
通讯作者：
I. Cole;R. Gottschalg
中科院分区：
文献类型：
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作者：
I. Cole;R. Gottschalg
随着聚光光伏（CPV）技术在美国阳光地带地区即将进入进一步发展阶段，更新与该技术相关的预测工具势在必行。这包括将太阳建模为一个扩展的光源，特别注意太阳周围的辐照度。基于改进的周太阳辐照度参数化方法，对标准扩展光源太阳廓线模型进行了改进。一个与周日比（CSR）为0.3有关的太阳剖面的案例研究表明，在标准模型中入射直接正常辐照度收集高估了0.5%-1.5%。这里提出的模型减轻了这些错误，并纠正了标准模型中对CSR的错误表述。当输入CSR分辨率为0.01时，归一化输出CSR的均值和标准差分别从0.937和0.107提高到1.000和0.005。在此基础上，提出了考虑太阳中心区和太阳周区光谱分布差异的模式扩展。针对多结单体结构的子单体，给出了CSR和空气质量变化效应的带状光谱分析。关于这些变量与可用输入辐照度之间的关系，在每个子单元的趋势中发现显著差异。
With concentrator photovoltaics (CPV) technology soon to enter a phase of further development in the USA Sunbelt region, it is imperative to update the predictive tools associated with the technology. This involves modeling the Sun as an extended light source with particular attention to circumsolar irradiance. An improvement to the standard extended light source solar profile model is presented based on an improved parameterization of the circumsolar irradiance. A case study for a solar profile pertaining to a circumsolar ratio (CSR) of 0.3 shows incident direct normal irradiance collection overestimations in the standard model of 0.5%-1.5%. The model presented here mitigates these errors and corrects for a misrepresentation of CSR in the standard model. For an input CSR resolution of 0.01, the mean and standard deviation of normalized output CSR are improved from 0.937 and 0.107 to 1.000 and 0.005. Furthermore, a model extension is presented, incorporating the spectral distribution differences in the central solar and circumsolar regions. A banded spectral analysis of CSR and air mass variation effects are presented, corresponding to the subcells of the multijunction cell architecture. Significant differences are found in the trends of each subcell regarding the relationship between these variables and usable input irradiance.