石蜡在管外凝固过程的理论和实验分析  

Theoretical and experimental study on solidification of paraffin outside coil tube

作　　者：张奕[1] 张小松[1] 

机构地区：[1]东南大学能源与环境学院

出　　处：《化工学报》2008年第6期1360-1365,共6页CIESC Journal

基　　金：国家自然科学基金项目(50376052,50676018);教育部科学技术研究重大项目(307013)~~

摘　　要：The influence of inlet temperature of cooling water on the solidification of paraffin outside the coil tube was investigated.Numerical equations were set up to calculate the heat transfer inside the heat exchanger.The calculation of temperature fields of water and paraffin agreed well with experimental results.The temperature fields of paraffin near to the tube were different with different inlet temperatures of water,while the temperature fields far away from the tube were almost the same.The distribution of dimensionless temperature fields of paraffin was similar at different inlet temperatures of water,except for the region near to the phase interface.The interface moved faster at a lower inlet temperature of water.The moving rate of the interface slowed down at first,and became faster again when the interface was discontinuous.The results can provide the guidance for choosing the right inlet temperature of water for an appropriate solidification rate of paraffin.The influence of inlet temperature of cooling water on the solidification of paraffin outside the coil tube was investigated.Numerical equations were set up to calculate the heat transfer inside the heat exchanger.The calculation of temperature fields of water and paraffin agreed well with experimental results.The temperature fields of paraffin near to the tube were different with different inlet temperatures of water,while the temperature fields far away from the tube were almost the same.The distribution of dimensionless temperature fields of paraffin was similar at different inlet temperatures of water,except for the region near to the phase interface.The interface moved faster at a lower inlet temperature of water.The moving rate of the interface slowed down at first,and became faster again when the interface was discontinuous.The results can provide the guidance for choosing the right inlet temperature of water for an appropriate solidification rate of paraffin.

关 键 词：蛇形盘管 进口温度 传热过程 石蜡 凝固 

分 类 号：TK512.4[动力工程及工程热物理—热能工程]