光伏冷却系统微结构流动损失特性的熵产分析方法

温度是影响光伏电池转换效率和发电系统稳定运行的重要影响因素,目前已发展出多种太阳能电池板的冷却技术,其中微通道冷却技术有着广阔的应用前景。对于微流动器件的局部结构,如何定量研究其功率损失是提高微流动系统性能的关键问题。本文基于热力学第二定律的熵产分析方法,以光伏电池冷却系统内渐缩圆管微结构为研究对象,提出了确定功率损失系数的算法流程。基于CFD数值模拟结果和EPA模型,发展了雷诺数Re∈{1,2000}范围内功率损失系数与雷诺数的关联方程式。

EPA Analysis of Fluid Loss Characteristics for a Microstructure in Photovoltaic Power Cell Cooling System

Temperature is an important factor to influence the conversion efficiency and stable operation of photovoltaic power systems. Up to now, there has developed a variety of solar panels cooling technique in which micro -channel cooling technology has broad application prospects. For the local structure of micro -flow devices, how to quantitatively study the power loss is critical issues to improve the perform- ance of micro -flow system. Using entropy production approach （EPA） based on the second law of ther- modynamics and aiming at channel micro - structure within cooling system in photovohaic ceils as the study object, the algorithm and processes to determine the power loss coefficient are proposed. Mean- while, based on CFD simulation results and the EPA model, association equation towards power loss coef- ficient and Reynolds numbers are developed within the scope of Reynolds numberRe∈{1,2000}.