管外蒸发换热器内壳侧流体的传热性能  

Shell side heat transfer characteristics of heat exchanger for evaporating outside the tube

作　　者：李霞[1] 于腾祥[1] 谭祥辉[1] 安冬旭[1] 朱冬生[1] 

机构地区：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237

出　　处：《化学工程》2013年第8期26-29,52,共5页Chemical Engineering(China)

摘　　要：提出了一种新型干式蒸发器,制冷剂以一定流速在蒸发器的壳程流动,所生成的汽泡不能自由上浮,而是与液体混在一起,形成汽液二相流继续向前流动。以实验的形式对其壳侧传热和流阻性能进行了研究,并拟合得到相应Re下的相关准则关系式。研究结果表明:此干式蒸发器传热效果良好、压降较低,与理论研究效果一致,具有一定的工业应用价值。A new dry-type evaporator was proposed. The refrigerant flowed in the evaporator shell side with a certain flow rate. The bubble generated could not freely float, but mixed with the liquid to form the vapor-liquid two-phase flow, and continue to flow forward. The characteristics of shell side heat transfer and flow resistance of the dry evaporator with internal heat source were studied, which fitted the relevant criteria relationship under the corresponding Re. The results indicate that the dry evaporator has good effects of heat transfer and lower pressure drop, which agrees well with the theoretical study, and is worth in industrial application.

关 键 词：蒸发器 内加热源 强化传热 节能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]