T型沸腾强化换热管传热性能的实验研究  

Experimental Study of the Heat Transfer Performance of a T-shaped Fin Boiling Intensified Heat Exchange Pipe

作　　者：司少娟[1] 欧阳新萍[1] 张连杰[1] 洪思雯[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《热能动力工程》2011年第4期410-414,491,共5页Journal of Engineering for Thermal Energy and Power

基　　金：上海市重点学科建设基金资助项目(S30503)

摘　　要：对一种T型翅片内螺纹沸腾强化换热管进行换热性能实验研究,管外以制冷剂R134a为工质,管内以水为介质,在定热流密度(q=9 000 W/m2)与定水流速(v=1.5 m/s,v=2.6 m/s)的工况下得到一系列实验数据。利用Wilson图解法得到管内外的换热系数,并与理论光管计算值进行比较,得出T型翅片管管内外沸腾换热强化倍率,管内内螺纹结构换热强化倍率为2.3、管外沸腾换热强化倍率为4.05～5.22。同时给出管外换热系数与热流密度关系式。Experimentally studied was the heat exchange performance of a T-shaped fin inner-threaded boiling intensified heat exchange pipe with the refrigerating agent R134a serving as the working medium outside the pipe and water as the working medium inside the pipe.During the test,a series of data were obtained at a constant heat flux density（q=9 000 W/m2） and a constant water flow speed（v=1.5 m/s,v=2.6 m/s）.By employing the Wilson diagram method,the authors have obtained the heat exchange coefficients inside and outside the pipe and compared them with the calculated values of a theoretically bare tube.As a result,the boiling-based heat exchange intensification rates inside and outside the tube were obtained：2.3 for the inner threaded structure inside the tube and 4.05~5.22 for the boiling heat exchange outside the tube respectively.In the meantime,a formulae showing the relationship between the heat exchange coefficient outside the tube and the heat flux density was given.

关 键 词：传热学 强化换热 Wilson图解法 传热系数 沸腾 

分 类 号：TK172[动力工程及工程热物理—热能工程]