阵列翅片式槽道耦合射流热沉流动与传热特性研究

Study on Flow and Heat Transfer Performance of Array Finned Channel Coupled Jet Heat Sink

中文关键词: 实验验证  钙钛矿叠层太阳能电池  数值模拟  槽式热沉

英文关键词: experimental verification  perovskite tandem solar cell  Numerical simulation  trough heat sink

中文摘要:

      钙钛矿叠层太阳能电池在高倍聚光条件下温度的极速上升会导致光电转化效率下降，为解决这一问题，本文构建了一种阵列翅片式槽道耦合射流热沉。采用实验结合CFD数值模拟的方法，分析射流高径比(H/d)、槽道纵宽比、泵功等因素对热沉流动特性及传热特性的影响。结果表明：槽式结构的热沉比光滑表面热沉具有更好的换热效果；H/d越小，换热效果越好，射流雷诺数越大，换热效果越好;热沉结构是影响压损的主要因素；热阻随泵功的增大而降低，当泵功大于0.15W时，这种趋势趋于平缓。

英文摘要:

      The rapid rise in temperature of perovskite tandem solar cell under high concentration ratio leads to a de-cline in photoelectric conversion efficiency. To solve this problem, an array finned channel coupled jet heat sink was designed. The effects of the ratio of height to diameter of jet (H/d) on heat transfer, channel aspect ratio, pumping power and other factors on heat transfer and flow characteristics were studied by the computational fluid dynamics (CFD) and experimental method. The results indicate that the trough micro-jet heat sink has better performance than smooth cooled surface heat sink under steady state conditions. The smaller the H/d, the better the heat transfer performance, and the larger the jet Reynolds number, the better the heat exchange effect. The main influence factor of pressure loss is heat sink structure. The ther-mal resistance decreases with the increasing pumping power, and the trend tends to be flatter when the pumping power exceeds 0.15W.