非均风速场对热泵机组结霜速度的影响  

Effect of Airflow Non-uniformity on Frosting Velocity for Heat Pump

作　　者：柳成文[1] 龚建英[2] 

机构地区：[1]山西大学,山西太原030013 [2]西安交通大学,陕西西安710049

出　　处：《流体机械》2008年第3期54-57,共4页Fluid Machinery

摘　　要：针对一台名义制冷量为50 kW的风冷热泵冷热水机组,研究了风速不均匀分布对换热器结霜速度的影响。实验结果表明:不均匀度0.93与0.18相比,霜出现时间提早13m in;随风速不均匀度增大,系统动态运行参数值降低;结霜后阶段,结霜速度快慢决定系统参数衰减程度。The experiments for different airflow non-uniformity degree were conducted on a 50 kW unitary air source heat pump chiller/heater. The effects of non-uniformity airflow on frosting velocity were studied. According to the experiments, it was shown as the followings： When AMD was increased from 0.18 to 0.93, the frost occurring time quickened by 13 minutes; With AMD increasing, the refrigeration system characteristics decreased. At the later frosting stage, the degree of the fall of the system parameters was determined by the frosting velocity.

关 键 词：风冷热泵冷热水机组 风速分布不均匀度 结霜速度 

分 类 号：TB65[一般工业技术—制冷工程]