新型车用空调平行流蒸发器湿工况性能的研究

摘要

对新型车用空调平行流蒸发器湿工况性能进行了试验研究,并与层叠式蒸发器进行了比较.动态浸渍试验结果表明平行流蒸发器凝水排除能力较优;焓差法试验结果表明,在不同的稳定工况下,与层叠式蒸发器相比,平行流蒸发器的制冷能力较强(最高差3.3%),空气侧压降较高,全换热系数大21.3%～29%,除湿率略高.试验结果总体表明,新型平行流蒸发器性能优良,完全可以取代层叠式蒸发器.%An experimental study is carried out on the wet performance of new parallel flow evaporator for automotive air conditioners, which is then compared with baseline laminated evaporator.Dynamic dip test results show that parallel flow evaporator has better condensate drainage performance.The results of enthalpy difference test reveal that, under different working conditions, compared with laminated evaporator, the parallel flow evaporator has slightly higher cooling capacity (up to 3.3％ difference), higher air side pressure drop, 21.3％ ～29％ higher over all heat transfer coefficient and slightly higher dehumidify rate.The results of all tests indicate that the new parallel flow evaporator has excellent performance and can by all means replace laminated evaporator.