【摘要】 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。更多还原

【Abstract】 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 performance of micro- flow system. Using entropy production approach( EPA) based on the second law of thermodynamics and aiming at channel micro- structure within cooling system in photovoltaic cells as the study object,the algorithm and processes to determine the power loss coefficient are proposed. Meanwhile,based on CFD simulation results and the EPA model,association equation towards power loss coefficient and Reynolds numbers are developed within the scope of Reynolds number Re∈ { 1,2000}.更多还原