套管式CO_2蒸发器的优化设计计算  

Optimized Design Calculation for a Double-tube CO_2 Evaporator

作　　者：杨俊兰[1] 唐嘉宝 苗艳芳[1] 

机构地区：[1]天津城建大学,天津300384

出　　处：《流体机械》2016年第5期83-86,共4页Fluid Machinery

摘　　要：为了设计出结构紧凑、具有更好换热性能的CO_2蒸发器,本文建立了套管式CO_2蒸发器的计算模型,论述了套管式换热器的计算方法和步骤,并最终确定了套管式换热器的结构尺寸和型式。结果表明:传热系数随管束内径的增大先增大后减小,CO_2侧压降随管束内径的增大而减小;管束个数增加,换热系数和CO_2侧压降都减小。研究成果可为今后套管式CO_2蒸发器的优化设计提供理论依据。In order to design a CO2 evaporator of which structure is compact and heat transfer performance is better,this paper establishes the calculation model of the double-tube CO2 evaporator,discusses the calculation method and steps of the evaporator,uses EES software simulation analysis,and finally determines its size and type. The results show that the heat transfer coefficient along with the increase of tube bundle diameter first increases and then decreases,the CO2 side pressure drop decreases with increasing of bundle diameter; with the tube bundle number increasing,the heat transfer coefficient and pressure drop of CO2 side decrease. The research for the double-tube evaporator provides theoretical basis for the optimization design of CO2 evaporator.

关 键 词：CO2 套管式蒸发器 设计计算 换热性能 

分 类 号：TH137.8[机械工程—机械制造及自动化] TK172[动力工程及工程热物理—热能工程]