摘要
将膨胀阀开度连续变化使蒸发器出口由大过热度到一定量的回液这一过程分为四种情形,通过试验了解系统及压缩机在各状态下的性能。结果表明：压缩机在30Hz到80Hz各频率下,过热度从10~70℃降到蒸发器出口大量回液,系统性能系数均在‘0’过热有最高点。相对于过热度2~70℃制冷量Q0增大4%~12%,COP提高6%~13%,在‘0’过热后回液量进一步加大系统性能降低,但在‘0’过热点附近蒸发器出口存在明显震荡。
Liquid-Refrigerant return is divided into four case by amount of liquid Refrigerant from evaperator.Experiments are carried out to investigate the effect of different superheat and liquid refrigerant floodback degree on the performance of inverter unit and rotary compressor.When compressor vary from 30hz to 80 hz,the results indicated that system perfomence coefficient reach the highest points at ＇0＇superheat point.Cooling capacity increased by 4%～12% compred with 2～70℃ superheat degree cases,while COP icreased by 6%～13%.Performance characteristics decreased with the amount of Liquid-Refrigerant return,leading to periodic oscillation of the refrigeration cycle.
出处
《流体机械》
CSCD
北大核心
2010年第10期53-57,共5页
Fluid Machinery
基金
国家高技术研究发展计划资助项目(863计划)(No.2008AA05Z204)
关键词
'0’过热度
滚动转子压缩机
回气带液
变频制冷系统
＇0＇superheat
rotary compressor
liquid refrigerant floodback
inverter refrigeration system
