CAJ | 학술논문

采用了3种不同组分比例的R32/R134a工质在0.86 mm的微通道中进行了传热特性和阻力特性的实验研究,考察了非共沸工质不同组分比例对微通道换热特性的影响。实验结果表明：在组分质量分数比为35%/65%时,核态沸腾在小干度下换热效果最好;干度较大时,组分比例对换热的影响效果降低。在大质量流量下传热阻力效应的影响不再明显。在压降方面,组分比为15%/85%的相对压降最大,其它两种组分的压降较小。
채용료3충불동조분비례적R32/R134a공질재0.86 mm적미통도중진행료전열특성화조력특성적실험연구,고찰료비공비공질불동조분비례대미통도환열특성적영향。실험결과표명：재조분질량분수비위35%/65%시,핵태비등재소간도하환열효과최호;간도교대시,조분비례대환열적영향효과강저。재대질량류량하전열조력효응적영향불재명현。재압강방면,조분비위15%/85%적상대압강최대,기타량충조분적압강교소。
The heat transfer characteristics in microchannel 0.86 mm in diameter for refrigerant mixture R32/R134a with three different mass proportions were studied and the effect of non-azeotropic working media with different mass proportions on heart transfer in the microchannel was investigated.The experiment result showed that when mass proportion was 35%/65%,flow boiling heat transfer was the best at low dryness fraction,while the effect of mass proportion on heat transfer was not obvious at high dryness fraction.Heat transfer resistance effect was not obvious at a high mass flux.Pressure drop was the largest when mass proportion was 15%/85%,and for the other two mass proportions,25%/75% and 35%/65%,pressure drop was relatively smaller.