R32在绝热毛细管中流动模型的验证  

Verification of R32 flow model in adiabatic capillary

作　　者：庄晋文 张晨旭 赵树男 Zhuang Jinwen;Zhang Chenxu;Zhao Shunan(GREE Electric Appliance Incorporate of Zhuhai,Zhuhai;State Key Laboratory of Air-conditioning Equipment and System Energy Conservation,Zhuhai;Guangdong Key Laboratory of Refrigeration Equipment and Energy Conservation Technology,Zhuhai)

机构地区：[1]珠海格力电器股份有限公司,珠海市519000 [2]空调设备及系统运行节能国家重点实验室,珠海 [3]广东省制冷设备节能环保技术企业重点实验室,珠海

出　　处：《暖通空调》2023年第9期146-151,共6页Heating Ventilating & Air Conditioning

摘　　要：本文建立了R32在绝热毛细管中流动的一维均相模型,并用实验数据验证了该模型的准确性。对比了采用现有文献中5种摩擦因子关联式和4种黏度关联式不同组合时的预测性能。结果表明:f=F(Re)模型与f=F(ε/D,Re)模型在低雷诺数区域预测值相似;随着雷诺数的增加,表面粗糙度的影响使f=F(ε/D,Re)模型预测值明显大于f=F(Re)模型,同时f=F(ε/D,Re)模型对质量流量的预测精度也要优于f=F(Re)模型。在f=F(Re)模型中,Bittle and Pate-Dukler模型具有最小平均绝对偏差(6.99%),有76.92%的数据点相对偏差在±10%以内、94.87%的数据点相对偏差在±20%以内。在f=F(ε/D,Re)模型中,Moody-Dukler模型具有最小平均绝对偏差6.38%,有82.05%的数据点相对偏差在±10%以内、97.44%的数据点相对偏差在±20%以内。This paper establishes a one-dimensional homogeneous model of R32 flowing in an adiabatic capillary,and verifies the accuracy of the model with experimental data.The prediction performance is compared by using different combinations of five friction factor correlations and four viscosity correlations in present literature.The results show that f=F(Re)model and f=F(ε/D,Re)model have similar prediction value in low Reynolds number region.As the Reynolds number increases,the effect of surface roughness makes the prediction value of f=F(ε/D,Re)model is significantly larger than that of f=F(Re)model,while the prediction accuracy of the mass flow rate of f=F(ε/D,Re)model is also better than that of f=F(Re)model.In f=F(Re)model,the Bittle and Pate-Dukler model has a minimum average absolute deviation(6.99%),with 76.92%of the data points having relative deviations within±10%,and 94.87%of the data points having relative deviations within±20%.In f=F(ε/D,Re)model,the Moody-Dukler model has a minimum average absolute deviation(6.38%),with 82.05%of the data points having relative deviations within±10%,and 97.44%of the data points having relative deviations within±20%.

关 键 词：R32 绝热毛细管 黏度 摩擦因子 流动模型 

分 类 号：TB64[一般工业技术—制冷工程] TB657.2