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Using energy balance method to study the thermal behavior of PV panels under time-varying field conditions

机译：使用能量平衡法研究时变电场条件下光伏电池板的热行为

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摘要

A precise estimate of PV panels temperature is crucial for accurately assessing their electrical performance. Therefore, in this study, one of the main aims has been to significantly improve the prediction accuracy of the PV cell temperature, by using realistic boundary conditions. Unlike previous thermal models in the literature, which usually focus on its mere application, a detailed step by step development and numerical implementation of the complete model has also been provided in great details in this work. The developed model is transient, so it can fully simulate the thermal performance of any PV panel under time-varying field conditions. Once the model is defined for a specific PV panel, the only external inputs it needs are the total incident solar irradiation, wind speed and the ambient temperature. The model has been adequately validated through PV panel's datasheet provided information, literature data and against a versatile set of experimental data under various weather conditions. After thorough validations, the developed model was compared to various other widely used empirical, analytical and numerical thermal models from the literature. The comparison shows that by using realistic boundary conditions, the developed thermal model has far better prediction accuracy than other models from the literature. The methodology presented in this study is completely generic. That is, though it has been implemented and validated here for a silicon-based PV module the approach may be used to model any freestanding plane PV surface, with appropriate modifications to layer thicknesses and material properties. A range of weather conditions may also be accommodated.
机译：精确估算光伏面板温度对于准确评估其电气性能至关重要。因此，在这项研究中，主要目标之一是通过使用实际边界条件来显着提高PV电池温度的预测精度。与文献中以前的热模型通常只关注其简单应用不同，在这项工作中还提供了详细的逐步开发和完整模型的数值实现的详细信息。所开发的模型是瞬态的，因此它可以完全模拟随时间变化的现场条件下任何光伏面板的热性能。为特定的光伏面板定义模型后，唯一需要的外部输入就是入射太阳总辐射，风速和环境温度。该模型已通过PV面板的数据表（提供的信息，文献数据）以及在各种天气条件下的一组通用实验数据进行了充分验证。经过全面验证，将开发的模型与文献中其他各种广泛使用的经验，分析和数值热模型进行了比较。比较表明，通过使用实际边界条件，所开发的热模型比文献中的其他模型具有更好的预测精度。本研究中介绍的方法是完全通用的。也就是说，尽管此处已针对基于硅的PV模块实施并验证了该方法，但该方法可用于对任何独立的平面PV表面建模，并对层厚度和材料属性进行适当修改。也可以适应各种天气条件。

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