低温流体管外工质换热实验装置设计及探索  

Design and Exploration of Experimental Device for Heat Transfer of Low Temperature Fluid Outside the Tube

作　　者：唐建峰 许涛 姚宝龙 李慧 李童 TANG Jianfeng;XU Tao;YAO Baolong;LI Hui;LI Tong(College of Pipeline and Civil Engineering,Shandong Provincial Key Laboratory of Oiland Gas Storage and Transportation Safety,China University of Petroleum(East China),Qingdao 266580,Shandong,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东省油气储运安全省级重点实验室,山东青岛266580

出　　处：《实验室研究与探索》2023年第1期94-98,共5页Research and Exploration In Laboratory

基　　金：中国石油大学(华东)校级教学改革项目(KC-202023)。

摘　　要：为了研究水平管外工质在较低饱和温度下的冷凝传热特性,在中间介质式汽化器的基础上,基于测壁温法和能量守恒原理,设计并搭建了工质在低温流体管外自然循环换热的实验装置。该装置可以开展不同蒸发侧温度、冷氮气流速、换热强化管、工质种类等工况下的实验研究,并配有可视化管段用于观察换热工质气液相间转换的过程,能够获得凝结表面传热系数、凝结液膜流态及热阻分布,分析冷凝管外壁轴向温度、腔体温度随管内冷氮气流速的变化规律。功能验证实验结果表明,低温流体管外工质凝结换热过程中,壁面热通量小于壁面过冷度对传热系数的影响,传热系数随冷氮气流量升高而降低、随蒸发侧水温的降低而减小。In order to study the heat transfer characteristics of the medium outside the horizontal tube at lower saturation temperatures,an experimental apparatus was designed and constructed based on the intermediate medium type gasifier,the wall temperature measurement method and the principle of energy conservation for the natural circulation of the heat transfer of the mass outside the low temperature fluid tube.The device can realize the experimental research under different working conditions such as evaporation side temperature,cold nitrogen gas flow rate,heat exchange reinforced tube and media type,etc.It is equipped with visualized tube section for observing the process of gas-liquid phase conversion of heat exchange mass,which can obtain the heat transfer coefficient of condensing surface with condensing liquid film flow pattern and thermal resistance distribution,and analyze the change law of the outer wall axial temperature of the condensing tube and cavity temperature with the cold nitrogen gas flow rate inside the tube.The results of the device function verification experiments show that the condensation heat transfer process outside the tube of low temperature fluid,the wall heat flux is less than the effect of wall subcooling on the heat transfer coefficient,the heat transfer coefficient shows a trend of decreasing with the cold nitrogen gas flow rate and decreasing with the evaporation side of the water temperature.

关 键 词：低温流体 中间介质式汽化器 相变换热 

分 类 号：TE83[石油与天然气工程—油气储运工程]