低温工况下R410A热泵蒸发器的除霜过程  

Defrosting process of a heat pump type evaporator using R410A in low temperature condition

作　　者：薛梅[1] 刘颖[1] 王芳[1] 邬志敏[1] 

机构地区：[1]上海理工大学动力工程学院,上海200093

出　　处：《低温工程》2008年第4期28-31,共4页Cryogenics

基　　金：上海市重点学科建设资助项目(T0503);上海市教委发展基金资助项目(05EZ25);上海理工大学研究生创新基金资助项目

摘　　要：在全自动焓差实验室和热泵性能测试系统中,对1台R410A空气源热泵翅片管式蒸发器的除霜过程进行了低温状态下的试验研究。通过改变蒸发器制冷剂侧和空气侧的流体温度,流量等参数,利用显微摄影机对室外侧换热器的平直翅片表面的除霜过程进行动态跟踪,得出适当的除霜周期,达到有效节能的目的。实验表明:在蒸发器的除霜过程中,设定除霜循环周期为5 min,可有效减少除霜能耗,达到节能的目的。An air-enthalpy test room and a heat pump performance test system were used to evaluate the defrosting of a R410A fin-tube evaporator in the cryogenics. By changing the fluid temperature and flow rate on the refrigerant/air side, the defrosting process on flat fin surface of an outdoor heat exchange was traced dynamically using a microphotography camera. The suitable period for defrosting cycle was given to save energy effectively. It is shown that 5 minutes of defrosting circulation can reduce the unnecessary energy consumption and save energy effectively.

关 键 词：R410A 低温工况 翅片管式蒸发器 显微摄影法 除霜 

分 类 号：TB657[一般工业技术—制冷工程]