翅片型式对空气源热泵机组结霜特性的影响  

Effects of Fin Type of Evaporator on Frosting Characteristics of Air Source Heat Pump Unit

作　　者：郭宪民[1,2] 杨宾[1] 陈纯正[2] 

机构地区：[1]天津商业大学天津市制冷技术重点实验室,天津300134 [2]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2009年第1期67-71,共5页Journal of Xi'an Jiaotong University

基　　金：天津市应用基础研究计划资助项目(06YFJMJC05500)

摘　　要：对使用条缝翅片管换热器的空气源热泵空调器在结霜工况下的动态性能进行了试验研究,用显微照相法测量了不同条件下室外换热器表面的霜层厚度,并与采用平翅片管换热器的热泵样机试验结果进行了比较.结果表明:在结霜初始阶段,条缝翅片管换热器表面霜层增长速度远大于平翅片管换热器,结霜循环周期大大缩短;对于低相对湿度工况,条缝翅片管换热器在结霜过程中出现了一段表面霜层厚度几乎不增长的时间段,使得其结霜周期显著增大;与使用平翅片管换热器的热泵样机不同,使用条缝翅片管蒸发器的热泵机组的制热量及性能系数随环境空气相对湿度的升高而大幅度降低.Experiments on the dynamic performance of an air source heat pump （ASHP） unit with split fin-tube heat exchangers were conducted under frosting conditions. The frost thickness on the evaporator was measured with a microscope. The experimental results indicate that in the initial frosting stage, the growth rate of the frost thickness on the split fin-tube heat exchanger was much greater than that on the plane fin-tube heat exchanger, and thus the frosting duration shortened significantly. Under low air relative humidity conditions, there was a period during which the frost thickness on the split fin-tube evaporator was almost invariable, leading to a longer frosting duration. Unlike the ASHP unit with the plane fin-tube evaporator, the heating capacity and the coefficient of performance of the ASHP unit with the split fin-tube evaporator decreased significantly with the increase of the air relative humidity.

关 键 词：空气源热泵 结霜 条缝翅片管换热器 

分 类 号：TB657[一般工业技术—制冷工程]