变间距对称圆孔翅片管式换热器结霜工况下的节能性能

Energy conservation performance of finned-tube heat exchanger under frosting condition

利用风洞试验装置试验研究变间距对称圆孔翅片管式换热器在结霜工况下的制冷性能。研究结果证明：在迎面平均风速为1．87～4．30m／s时，在同等试验条件下，变问距对称圆孔翅片管式制冷换热器的制冷量在低风速下比非变间距圆孔翅片管式制冷换热器换热量提高7．6％，当量表面传热系数提高18．26％，阻力减小48．85％，节省21．43％的翅片金属材料。

In order to investigate the refrigeration performance of finned-tube heat exchanger with changing fin spacing and symmetrical holes under frosting conditions, a wind-tunnel experiment on the energy conservation performance was carried out. The experimental results show that in the range of head-on-average velocity from 1.87-4.30 m/s, comparing the finned-tube refrigeration heat exchanger with no-changing fin spacing and holes, in the same experimental condition and geometric size, the cooling capacity of the former exchanger increases by 7.6%; the surface of the fm heat transfer coefficient raises by 18.26%; and the resistance decreases by 48.85% with saving 21.43% metal material of fin in lower velocity.