平板型双流道太阳能空气集热器扰流板结构优化

Baffles Optimization of a Flat Plat Solar Air Collector with Double Channels

构建了平板型双流道太阳能空气集热器,提出了安装开孔型扰流板的结构优化方案,将该方案与安装平面无孔式扰流板及无扰流板集热器进行了对比分析.结果表明,安装平面无孔式扰流板后,集热器背部区域会形成局部空气流动死区,而安装开孔型扰流板可以破坏和抑制流动死区的形成,从而提高集热器的集热效率和热性能.相比未安装扰流板的原始模型,安装扰流板后集热效率由53.4%增加到67.9%.

A flat plate solar air collector with double channels is established. The optimization schemes with perforated baffles are proposed. The thermal performance of optimized collector is anlyzed and compared with the commom plane baffle and non-baffle types. The results show that flow dead zones in back of baffles appear generally. The solar air collector with perforated baffles has a higher collector efficiency and thermal perfromance because of the forceful destabilization of flow dead zone. Compared with the model without baffles, the collecor efficiency increases from 53.4% to 67.9%.