R32/油混合物管内两相流动摩擦压降模型预测研究
|
摘要
R32具有很好的热物性,且GWP值相对较低,在制冷剂的替代进程中有潜力得到推广应用。在蒸汽压缩制冷系统中,润滑油难免随制冷剂混入换热部件,恶化制冷剂侧的流动特性。基于文献R32/油混合物两相流动摩擦压降实验数据,对比文献中四种模型的预测值和实验值。结果表明:在低质流密度工况下,文献模型对实验的结果预测精度较高,在高质流密度工况下,预测结果偏离了实验结果,且预测值均大于实验值,模型需进一步研究和优化。
The fluid R32 has the potential to be applied in the refrigeration system,because of its good thermal properties and relatively low GWP value.In the vapor compression processes,some oil circulates with the refrigerant are intrinsic and unavoidable,which has a significant impact on the two-phase flow characteristic.In this paper,the two-phase frictional pressure drop of R32/oil mixture was predicted by using the correlation models,and the predicted values were compared with the experimental data obtained from the literature.The result shows that the literature model predicts the experimental data precisely under the low mass flow rate.While with the mass flow rate increases,the predicted results deviate from the experimental results.Moreover,the predicted values are all greater than the experimental values.The models are needed further study.
The fluid R32 has the potential to be applied in the refrigeration system,because of its good thermal properties and relatively low GWP value.In the vapor compression processes,some oil circulates with the refrigerant are intrinsic and unavoidable,which has a significant impact on the two-phase flow characteristic.In this paper,the two-phase frictional pressure drop of R32/oil mixture was predicted by using the correlation models,and the predicted values were compared with the experimental data obtained from the literature.The result shows that the literature model predicts the experimental data precisely under the low mass flow rate.While with the mass flow rate increases,the predicted results deviate from the experimental results.Moreover,the predicted values are all greater than the experimental values.The models are needed further study.
引文
[1]MOTA-BABILONI A,NAVARRO-ESBRJ,BARRAGN A,et al.Drop-in energy performance evaluation of R1234yf and R1234ze(E)in a vapor compression system as R134a replacements[J].Applied Thermal Engineering,2014,71(1):259-265.
[2]MCLINDEN M O,KAZAKOV A F,Brown J S,et al.Athermodynamic analysis of refrigerants:Possibilities and tradeoffs for Low-GWP refrigerants[J].International Journal of Refrigeration,2014,38(1):80-92.
[3]MOHANRAJ M,MURALEEDHARAN C,JAYARAJ S.A review on recent developments in new refrigerant mixtures for vapour compression-based refrigeration,air-conditioning and heat pump units[J].International Journal of Energy Research,2011,35(8):647-669.
[4]杨申音,王勤,唐黎明,等.常规空调热泵系统的R32替代研究述评[J].制冷学报,2013,34(6):59-68.
[5]田镇,谷波,王婷,等.HFC-32制冷剂饱和液体热力性能参数计算模型[J].制冷学报,2013,34(2):28-32.
[6]李炅,张秀平,贾磊,等.R32管内流动传热特性的分析与讨论[J].流体机械,2012,40(12):74-79.
[7]CHO K,TAE S J.Evaporation heat transfer for R-22and R-407C refrigerant-oil mixture in a microfin tube with a U-bend[J].International Journal of Refrigeration,2000,23:219-231.
[8]CHEN I Y,WU Y S,CHANG Y J,et al.Two-phase frictional pressure drop of R-134a and R-410A refrigerant-oil mixtures in straight tubes and U-type wavy tubes[J].Experimental Thermal&Fluid Science,2007,31(4):291-299.
[9]HU H T,Ding G L,WEI W J,et al.Measurement and Correlation of Frictional Pressure Drop of R-410A/Oil Mixture Flow Boiling in a 7mm Straight Smooth Tube[J].Hvac&R Research,2008,14(5):763-781.
[10]DANG C,HARAGUCHI N,YAMADA T,et al.Effect of lubricating oil on flow boiling heat transfer of carbon dioxide[J].International Journal of Refrigeration,2013,36(1):136-144.
[11]MOMENIFAR M R,AKHAVAN-BEHABADI M A,NASR M,et al.Effect of lubricating oil on flow boiling characteristics of R-600a/oil inside a horizontal smooth tube[J].Applied Thermal Engineering,2015,91:62-72.
[12]BO Shen,GROLL E.Review Article:A Critical Review of The Influence of Lubricants on the Heat Transfer and Pressure Drop of Refrigerant,Part II:Lubricant Influence on Condensation and Pressure Drop[J].Hvac&R Research,2005,11(4):511-526.
[13]李炅,张秀平,贾磊,等.润滑油对R32在水平光管内流动沸腾换热特性及压降的影响[J].流体机械,2016,44(3):65-69.
[14]ECKELS S J,DOERR T M,PATE M B.In-tube heat transfer and pressure drop of R-134a and ester lubricant mixtures in a smooth tube and a micro-fin tube.Part I-Evaporation[J].ASHRAE Transactions,1994,100(2):265-282.
[15]TICHY J A,DUQUE-RIVERA J,MACKEN N A,et al.An experimental investigation of pressure drop in forced-convection condensation and evaporation of oil-refrigerant mixtures[J].J.Urology,1986,191:355.
[16]ZURCHER O,THOME J R,FAVRAT D,et al.Flow Boiling and Pressure Drop Measurements for R-134a/Oil Mixtures Part 2:Evaporation in a Plain Tube[J].Hvac&R Research,1997,3(1):54-64.
[17]胡海涛,丁国良,汪振策,等.R410A-油在#7mm水平直光管内流动沸腾阻力特性[J].上海交通大学学报,2007,41(3):370-375.
[2]MCLINDEN M O,KAZAKOV A F,Brown J S,et al.Athermodynamic analysis of refrigerants:Possibilities and tradeoffs for Low-GWP refrigerants[J].International Journal of Refrigeration,2014,38(1):80-92.
[3]MOHANRAJ M,MURALEEDHARAN C,JAYARAJ S.A review on recent developments in new refrigerant mixtures for vapour compression-based refrigeration,air-conditioning and heat pump units[J].International Journal of Energy Research,2011,35(8):647-669.
[4]杨申音,王勤,唐黎明,等.常规空调热泵系统的R32替代研究述评[J].制冷学报,2013,34(6):59-68.
[5]田镇,谷波,王婷,等.HFC-32制冷剂饱和液体热力性能参数计算模型[J].制冷学报,2013,34(2):28-32.
[6]李炅,张秀平,贾磊,等.R32管内流动传热特性的分析与讨论[J].流体机械,2012,40(12):74-79.
[7]CHO K,TAE S J.Evaporation heat transfer for R-22and R-407C refrigerant-oil mixture in a microfin tube with a U-bend[J].International Journal of Refrigeration,2000,23:219-231.
[8]CHEN I Y,WU Y S,CHANG Y J,et al.Two-phase frictional pressure drop of R-134a and R-410A refrigerant-oil mixtures in straight tubes and U-type wavy tubes[J].Experimental Thermal&Fluid Science,2007,31(4):291-299.
[9]HU H T,Ding G L,WEI W J,et al.Measurement and Correlation of Frictional Pressure Drop of R-410A/Oil Mixture Flow Boiling in a 7mm Straight Smooth Tube[J].Hvac&R Research,2008,14(5):763-781.
[10]DANG C,HARAGUCHI N,YAMADA T,et al.Effect of lubricating oil on flow boiling heat transfer of carbon dioxide[J].International Journal of Refrigeration,2013,36(1):136-144.
[11]MOMENIFAR M R,AKHAVAN-BEHABADI M A,NASR M,et al.Effect of lubricating oil on flow boiling characteristics of R-600a/oil inside a horizontal smooth tube[J].Applied Thermal Engineering,2015,91:62-72.
[12]BO Shen,GROLL E.Review Article:A Critical Review of The Influence of Lubricants on the Heat Transfer and Pressure Drop of Refrigerant,Part II:Lubricant Influence on Condensation and Pressure Drop[J].Hvac&R Research,2005,11(4):511-526.
[13]李炅,张秀平,贾磊,等.润滑油对R32在水平光管内流动沸腾换热特性及压降的影响[J].流体机械,2016,44(3):65-69.
[14]ECKELS S J,DOERR T M,PATE M B.In-tube heat transfer and pressure drop of R-134a and ester lubricant mixtures in a smooth tube and a micro-fin tube.Part I-Evaporation[J].ASHRAE Transactions,1994,100(2):265-282.
[15]TICHY J A,DUQUE-RIVERA J,MACKEN N A,et al.An experimental investigation of pressure drop in forced-convection condensation and evaporation of oil-refrigerant mixtures[J].J.Urology,1986,191:355.
[16]ZURCHER O,THOME J R,FAVRAT D,et al.Flow Boiling and Pressure Drop Measurements for R-134a/Oil Mixtures Part 2:Evaporation in a Plain Tube[J].Hvac&R Research,1997,3(1):54-64.
[17]胡海涛,丁国良,汪振策,等.R410A-油在#7mm水平直光管内流动沸腾阻力特性[J].上海交通大学学报,2007,41(3):370-375.