摘要
在设计压缩机的吸气管时,需要考虑制冷剂蒸汽的速度是否能够夹带润滑油返回到压缩机中。指出已有的KESIM回油模型中存在的错误,给出改正错误后的修正KESIM回油模型。基于流体力学基本原理,建立新的回油模型,根据润滑油的净体积流量为零和制冷剂蒸汽速度与油气界面速度的关系,提出计算制冷剂蒸汽最小回油速度的方法。新模型计算的最小回油速度较修正后的KESIM模型更准确。为了便于工程应用,针对R410A制冷剂和两种类型的铜管,通过一个饱和热力循环,将最小回油速度对应的流量转换成系统的最小制冷量。
The sufficent vapor velocity should be considered to insure adequate oil return, when designing the suction pipe. The error in reported KESIM model for oil return is analyzed and the KESIM model is revised. The new oil return model is presented based on fluid mechanics principle, and the method of calculating the minimum refrigerant velocity is proposed according to nil oil volumetric flow rate and the relation between refrigerant velocity and interface velocity. The comparison between the models and experimental data shows that the new model can predict the minimum velocity of oil return more accurate than the revised KESIM model. The velocity can be converted to refrigeration capacity through a saturated thermodynamic cycle for R410A and two types of copper suction pipe.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2008年第4期179-183,共5页
Journal of Mechanical Engineering
基金
教育部新世纪优秀人才计划资助项目([2005]290)
关键词
吸气管
回油
最小制冷剂速度
制冷剂蒸汽
Suction pipe Oil return Minimum refrigerant velocity Refrigerant vapor
