An Integrated Thermal Electrical Model for Single Cell Photovoltaic Receivers Under Concentration
An Integrated Thermal Electrical Model for Single Cell Photovoltaic Receivers Under Concentration
复制标题
聚光下单电池光伏接收器的集成热电模型
DOI：
10.1615/ihtc15.sol.009239
复制
发表时间：
2014
期刊：
影响因子：
9
通讯作者：
T. O'Donovan
中科院分区：
文献类型：
--
作者：
M. Theristis;T. O'Donovan
三维有限元分析是用来预测在稳态下的多结光伏电池的冷却要求。热模型的输入通过分析光谱相关的电模型导入，该电模型用于量化电池中产生的热量。自然对流和辐射热损失都考虑到了所有自由表面到周围环境的热损失。还考虑了电池表面的反射损失。结果报告了电池的最高温度和保持电池温度低于100°C所需的传热系数。在这项研究中，计算每层产生的电流密度和电压，从而可以量化精确的热功率，给出更准确的预测，从而更好地估计系统的冷却要求。结果表明，分析模型给出了一个现实的预测的热功率，通过每一层的III-V电池，由于其能力，包括电流失配和红外光吸收率。有人发现，CPV单电池配置高达500太阳的浓度可以充分冷却被动与散热器的热阻低于1.7 K/W，而在极端的环境条件下，热阻小于1.4 K/W的位置是必要的。
Three dimensional finite element analysis is used to predict the cooling requirements of a multijunction photovoltaic cell in steady-state. The inputs to the thermal model are imported through an analytical spectral dependent electrical model which is used to quantify the heat generated in the cell. Both natural convective and radiative heat losses are accounted for all free surfaces to the surroundings. Reflection losses from the cell’s surface have also been considered. The results report on the cell’s maximum temperature and the heat transfer coefficient required to maintain the cell’s temperature below 100°C. In this study, the current density and voltage produced is calculated for each layer, thus the exact thermal power can be quantified giving a more accurate prediction, resulting in a better estimation of the cooling requirements of the system. The results show that the analytical model gives a realistic prediction of the thermal power which passes through each layer of the III-V cell due to its ability to include the current mismatch and the infrared light absorption rate. It is found that CPV single cell configurations up to 500 suns concentration can be adequately cooled passively with a heat sink’s thermal resistance below 1.7 K/W while for locations with extreme ambient conditions, a thermal resistance less than 1.4 K/W is needed.