平行流冷凝器空气侧结构参数研究及优化

用正交实验法设计了平行流冷凝器空气侧数值模拟的结构方案,对车用空调冷凝器的风速范围进行流动换热计算.在此基础上,应用田口法分析翅片高度、百叶窗转向区长度、翅片间距、翅片宽度、百叶窗间距和百叶窗角度六个结构因素对空气侧传热和流动影响的重要性,得到空气侧最优参数组合.结果表明:翅片宽度是传热因子主要影响因素,翅片间距则对摩擦因子影响最大;翅片间距、百叶窗角度和百叶窗间距对平行流冷凝器空气侧综合性能影响起主要作用;在雷诺数600~1 400范围内,优化分析得到的最佳参数组合的平行流换热器空气侧综合性能提升了4.03%~11.09%.

Air Side Parametric Investigation and Optimization of Parallel Flow Condenser

Within the wind speed range of automotive air conditioning condenser, the scheme of air side parametric numerical simulation for parallel flow condenser was designed by orthogonal method, and the coefficients of flow friction and heat transfer were calculated. Moreover, the effects of fin height, overturning length, fin pitch, fin width, louver pitch and louver angle on air side flow friction and heat transfer were analyzed by Taguchi method. Finally, the optimal air side parametric combination of parallel flow condenser was obtained. The results show that the fin width plays an important role in heat transfer. The effect of fin pitch on flow friction is the biggest. The fin pitch, louver angle and louver pitch of parallel flow condenser has main effect on air side performance. Overall thermal hydraulic performance improves by 4.03% to 11.09% for Re in the range of 600~1 400.