TWO-PHASE REFRIGERANT DISTRIBUTION IN A PARALLEL-FLOW HEAT EXCHANGER

摘要：

The R-134a flow distribution is experimentally studied for a heat exchanger composed of round headers and 10 flat tubes. The effects of tube protrusion depth as well as mass flux, and quality are investigated. The flow at the header inlet is stratified. For the downward flow configuration, most of the liquid flows through frontal part of the header. The liquid distribution improves as the protrusion depth or the mass flux increases, or the quality decreases. For the upward configuration, most of the liquid flow through rear part of the header. The liquid distribution improves as the mass flux or quality decreases. The protrusion depth has a minimal effect. Possible explanation is provided from the flow visualization results.

作者: N.-H.KIM J.-H.HAM D.-Y.Kim

作者单位: Department of Mechanical Engineering, University of Incheon, ＃177 Dohwa-Dong, Nam-Gu,Incheon, 402-74 Graduate School, University of Incheon, ＃177 Dohwa-Dong, Nam-Gu, Incheon, 402-749, Korea

会议类型: 国际会议

会议名称: The 22nd International Congress of Refrigeration(第22届国际制冷大会)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-21（万方平台首次上网日期，不代表论文的发表时间）