复合中空热管传热性能研究  

Study of Heat Transfer Characteristics for Compound Hollow Heat Pipe

作　　者：马志磊[1] 张琳[1] 朱文通 宋文海[1] 

机构地区：[1]常州大学机械工程学院,江苏常州213016 [2]嘉兴市三通节能环保科技有限公司,浙江嘉兴314000

出　　处：《压力容器》2012年第6期19-23,共5页Pressure Vessel Technology

基　　金：国家发改委节能技术改造财政奖励项目(发改环资[2008]2386号);江苏政府留学奖学金资助(2010)

摘　　要：为了解决工业中的大量低品质烟气余热的回收利用和烟气酸露点腐蚀导致设备容易失效的工程问题,提出了一种复合中空热管传热元件,介绍了其结构及工作原理;对其内部传热机理进行了分析,并对其启动特性、等温性能和传热性能进行了试验研究。研究结果表明:复合中空热管在外管壁温度30℃时,加热时间2 min之内就能正常快速启动工作;在自然空气对流冷却条件下,具有较好的等温特性;复合中空热管的传热系数随着冷却水雷诺数的增加而增加;在加热蒸汽温度低于125℃的低温蒸汽加热条件下,当冷却水的雷诺数为6650时,复合中空热管的传热系数为1350W/(m2.℃)。试验研究结果为复合中空热管换热器的工程应用提供了基础。In order to solve the engineering problems of a large number of low - quality flue gas waste heat recovery and acid dew point corrosion leading to failure of the device easily, a new kind of heat transfer component named a compound hollow heat pipe was proposed. Its structure and working principle was in- troduced. Its internal heat transfer mechanism is analyzed, and its start - up characteristics, isothermal temperature performance and heat transfer properties were studied. The results show that compound hollow heat pipe can start and work fast while the outer tube wall temperature is 30℃ within 2 min heating time. And in the natural air convection cooling conditions, it has good temperature characteristics. The heat transfer coefficient of the compound hollow heat pipe increases with the cooling water Reynolds number. In the heating steam temperature is below 125℃ under conditions of low temperature steam heating, when the cooling water Reynolds number is 6650, the heat transfer coefficient of the compound hollow heat pipe is 1350 W/（ m2·℃ ）. Experimental results of the compound hollow heat pipe provide the basis of engineering applications for heat exchanger

关 键 词：复合中空热管 余热回收 节能 强化传热 

分 类 号：TH703.1[机械工程—仪器科学与技术] TQ051.5[机械工程—精密仪器及机械]