摘要
为了探讨圆孔翅片管在结霜工况下的制冷性能,利用风洞试验装置,在结霜工况下进行了空气外掠单排矩形翅片管式制冷换热器的节能性能试验研究.研究结果表明:在迎面平均风速1.87～5.00m/s的范围内,在相同试验条件和相同几何尺寸的条件下,三对称大直径圆孔翅片管式制冷换热器的制冷量比平翅片管式制冷换热器的提高3.0%～16.8%,平均提高9.0%;翅片表面传热系数增大49.7%～80.1%,平均增幅达64.3%;压缩机能效比提高15.0%～30.2%,平均提高23.0%;阻力平均降低32.0%.在5.5h的试验时间内,三对称大直径圆孔翅片表面仅部分圆孔被霜层堵塞,结霜工况下仍能维持优越的强化传热特征.
To probe into the refrigeration performance of hole finned-tube under frosting, a wind- tunnel experiment research on the energy conservation performance was carried out when air flows over a single-row-plane finned-tube refrigeration exchanger under a frosting condition. The experimental results show that compared with a plane finned-tube refrigeration exchanger in the same experimental condition and geometric size, when the average face velocity is from l. 87 to 5.0 m/s, the cooling capacity of a three-symmetrical big-hole finned-tube refrigeration exchanger increases 3. 0% to 16.8%, with an average value of 9.0% ; the fin surface coefficient of heat transfer raises 49.7% to 80.1%, the mean value being 64.3% ; the compressor COP （ coefficient of performance ） improves 15.0% to 30.2%, with an average of 23.0% ; and resistance decreases 32.0%. During 5.5 h experimental time, only some holes on the surface of the three symmetry big-hole fins were jammed by frost to keep a predominant enhancement heat characteristic.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2009年第3期455-460,共6页
Journal of Southwest Jiaotong University
基金
重庆市科技计划项目(城科字节能2007第6号)
关键词
制冷换热器
翅片
强化传热
节能
试验研究
refrigeration heat exchanger
fin
enhancement heat
energy conservation
experimental investigation
