摘要
换热器是工业中重要的换热组件之一,换热性能的良好与否直接影响整个机组的运行性能。本文采用数值模拟方法,使用Flow Simulation对管壳式换热器壳侧水与管侧R134a的两相流动及相变传热进行了模拟计算。根据流体流动特点,合适的湍流模型,选定水流在壳程中进行换热,并根据水的进出口温度来校核热交换;选定R134a冷媒在壳程中进行换热,并根据冷媒特性设置进出口温度及管程内部压力来校核热交换。通过对管壳式换热器壳侧的流体介质与管侧的流体介质发生的热交换进行模拟研究,得到了管壳式换热器壳程与管程的速度场、温度场、压力场的分布情况,并进行了分析。对当下壳管式换热器结构设计起到参考、指导、验证作用。
Heat exchanger is one of the most important heat transfer components in the industry.The heat transfer performance directly affects the operation performance of the whole unit.In this paper,the Flow Simulation method is used to simulate the two-phase flow and phase change heat transfer between water on the shell side and R134a on the tube side of a shell heat exchanger.According to the characteristics of fluid flow and the appropriate turbulence model,the water flow is selected to conduct heat exchange in the shell path,and the heat exchange is checked according to the inlet and outlet temperature of water,and then R134a refrigerant is selected to conduct heat transfer in the shell pass,the inlet and outlet temperature and internal pressure of the pipe pass are set according to the characteristics of the refrigerant to check the heat exchange.The distribution of velocity field,temperature field and pressure field of shell side and tube side of shell heat exchanger is obtained and analyzed by simulating the heat exchange between the fluid medium on shell side and on tube side.It has the function of reference,instruction and verification for the structure design of shell and tube heat exchanger.
作者
田亚
王祖辉
TIAN Ya;WANG Zu-hui(Denier Energy Saving Technology(Shanghai)Co.,Ltd.,Shanghai 200000,China)
出处
《压缩机技术》
2020年第5期46-52,共7页
Compressor Technology
关键词
管壳式换热器
热交换
水
R134a冷媒
数值模拟
shell and tube heat exchanger
heat exchange
water
R134a refrigerant
numerical simulation
