光伏冷却系统微结构流动损失特性的熵产分析方法  

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

作　　者：张昊春[1] 李垚[2] 韩俊[1] 王洪杰[1] 严利明[1] 秦江[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学复合材料研究所,黑龙江哈尔滨150001

出　　处：《节能技术》2014年第2期99-102,111,共5页Energy Conservation Technology

基　　金：国家自然科学基金项目(51006026;51010005);中央高校基本科研业务费专项资金(HIT.NSRIF.2012072)

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。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}.

关 键 词：熵产 光伏发电 冷却 微通道 流动损失 

分 类 号：TK124[动力工程及工程热物理—工程热物理]