R32/润滑油在微通道蒸发器内的滞油特性及其毛细管流动特性试验研究  

Experimental study on oil retention characteristics of R32/lubricating oil in micro-channel evaporator and its flow characteristics in capillary tube

作　　者：谷波[1] 许婧煊 陈云浩 胡晋珽 Gu Bo;Xu Jingxuan;Chen Yunhao;Hu Jinting(School of Mechanical Engineering,Shanghai Juao Tong University;School of Energy and Power Engineering,University of Shanghai Science and Technology)

机构地区：[1]上海交通大学机械与动力工程学院 [2]上海理工大学能源与动力工程学院

出　　处：《制冷与空调》2024年第10期56-63,70,共9页Refrigeration and Air-Conditioning

基　　金：国家自然科学基金(51976114)。

摘　　要：基于R32家用空调系统搭建R32/润滑油在平行流微通道蒸发器内的滞油特性及其毛细管流动特性测试平台。采用拆除称量法,测试不同入口油质量分数、质量流量及干度下的平行流微通道蒸发器内的滞油体积率,基于理论分析,建立能够反映流动特征的微通道蒸发器内的滞油量预测模型,并通过试验验证该仿真模型的准确性。另外,建立R32/润滑油毛细管内绝热流动的数学模型,经适当简化得到毛细管长度的计算公式,并通过试验测得不同尺寸、工况下的毛细管流量,验证模型的精度。最后,基于仿真模型得到的大量数据点,绘制R32毛细管诺模图。研究结果对R32毛细管的设计应用具有参考价值。Based on the R32 household air-conditioning system,a test platform for oil retention characteristics of R32/lubricating oil in a parallel flow micro-channel evaporator and its flow characteristics of R32 in capillary tube is built.Under different oil mass fractions,mass flow rates,degrees of dryness,the oil retention volume rates in the parallel flow microchannel evaporator are tested using removement weighing method.Based on theoretical analysis,the prediction model of oil retention quantity in micro-channel evaporator is set up,which can reflect flow characteristics,and the accuracy of simulation model is verified by test.The mathematical model of adiabatic flow of R32/lubricating oil in capillary tube is also set up.Through simplifying the model,the formula for calculating the length of the capillary is obtained.In addition,the capillary flow rates under different sizes and working conditions are measured,which can verify the accuracy of model.On the basis of data obtained by simulation,a nomogram for R32 in capillary tube is drawn.The research results have reference value for the design and application of R32 in capillary tube.

关 键 词：空调 R32 润滑油 蒸发器 滞油特性 毛细管 

分 类 号：TB6[一般工业技术—制冷工程]