混合制冷剂饱和流动沸腾传热关联式研究  

A study of saturated flow boiling heat transfer correlations for mixed refrigerants

作　　者：何志强[1] 方贤德[1] 方玉祥 李晓欢 李冲 HE Zhiqiang;FANG Xiande;FANG Yuxiang;LI Xiaohuan;LI Chong(Key Laboratory of Aircraft Environment Control and Life Support,MIIT,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学飞行器环境控制与生命保障工业和信息化部重点实验室,南京210016

出　　处：《流体机械》2025年第2期86-93,共8页Fluid Machinery

基　　金：国家自然科学基金项目(52076107,51576099)。

摘　　要：为了准确预测混合制冷剂饱和流动沸腾换热系数,从31篇文章中,收集建立了一个含有3 901个数据点的传热数据库,包含共沸混合物R507,R513A,近共沸混合物R410A,R404A,以及非共沸混合物R407C,R417A,R452A,R448A,R455A,R454C,R447A等11个制冷剂。该数据库参数范围:管内径D为0.5~21 mm;饱和压力p为0.019~2.501 4 MPa,质量流率G为50~1 109 kg/(m^(2)·s),热流密度q为2.5~60 kW/m^(2),干度x为0.003 6~0.998,滑移温度T_(g)为0.002~10.88 K。收集了26个纯制冷剂、16个混合制冷剂传热系数关联式。将现有关联式预测值与试验数据进行比较,结果表明,预测效果最好的关联式平均绝对误差δ_(MAD)为37.3%,平均相对误差δ_(MRD)为-18.3%。基于对现有模型的分析,提出了一个新的传热系数关联式,其δ_(MAD)为28.8%,δ_(MRD)为0.1%,预测效果较现有关联式有显著提高。In order to accurately prediction of the saturated flow boiling heat transfer coefficients of mixed refrigerants,a heat transfer database containing 3901 data points was collected from 31 papers,It contains the 11 refrigerants such as the azeotropic refrigerants R507,R513A,the near azeotropic refrigerants R410A,R404A,and the zeotrope refrigerants R407C,R417A,R452A,R448A,R455A,R454C,and R447A.The parameter range of the database covers hydraulic diameters of 0.5~21 mm,saturation pressure of 0.019~2.5014 MPa,mass flow rate of 50~1109 kg/(m^(2)·s),heat fluxes of 2.5~60 kW/m^(2),qualities of 0.0036~0.998,and temperature glide of 0.002~10.88 K.The correlations of heat transfer coefficients were collected for 26 pure refrigerants and 16 mixed refrigerants.The existing correlations predicted values were compared with the experimental data,the results showed that the best prediction correlation has a mean absolute errorδ_(MAD) of 37.3%and a mean relative errorδMRD of-18.3%.Based on the analysis of the existing models,a new heat transfer coefficient correlation was proposed which hasδ_(MAD)=28.8%andδ_(MAD)=0.1%,and the prediction performance was significantly improved over the existing correlations.

关 键 词：混合制冷剂 传热 关联式 流动沸腾 

分 类 号：TB611[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]