制冷剂在蒸发器中的流量分配及分液管设计  

Mass flow distribution of refrigerant in the evaporator and design method of the distribute tube

作　　者：梁俊杰[1] 田怀璋[1] 陈林辉[1] 高原[1] 陈敬良[1] 

机构地区：[1]西安交通大学,陕西西安710049

出　　处：《石油化工设备》2004年第1期30-33,共4页Petro-Chemical Equipment

摘　　要：利用毛细管和蒸发器的数学模型研究了制冷剂在分液管、蒸发器各盘管中的流量分配情况 ,说明了即使制冷剂在蒸发器入口气液两相混合均匀 ,但如果各蒸发器盘管间存在高度差和流动阻力差 ,仍会造成流入蒸发器各盘管的流量偏差 ,并指出了它们之间的影响规律。根据该影响规律 ,提出了分液管的设计方法 ,以减少或消除这种原因产生的流量偏差 ,提高蒸发器的换热效率。The study investigates the mass flow distribution of refrigerant in the evaporation coils using the numerical models about capillary tube and evaporator. The analysis shows that even if the two-phase refrigerant is mixed homogenously in the inlet of the evaporator , mass flow deviations still exist if there are altitude differences and flow resistant differences among the evaporator coils. The principle summarized from the analysis is given to design distribute tubes, which can decrease or eliminate the mass flow deviation among evaporator coils and enhance the heat transfer efficiency of a dry evaporator.

关 键 词：蒸发器 制冷剂 流量偏差 压降比 分液管 

分 类 号：TQ051.602[化学工程]