波槽管管外珠状凝结换热的实验探讨  

Experimental Investigation of Tube-outside Dropwise Condensation Heat Exchange of a Corrugated Tube

作　　者：黄渭堂 刘锋 照日格图[1] 

机构地区：[1]哈尔滨工程大学动力与核能工程学院,黑龙江哈尔滨150001

出　　处：《热能动力工程》2005年第6期587-590,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：在水平及垂直管外水蒸气凝结的条件下,对4种实验管的传热性能进行了比较实验研究.对于水平、略高于大气压的凝结条件,在实验范围内,BGT管的总传热系数约为光管的1.38～1.60倍,而BGT-1管的总传热系数约为光管的2.05～2.16倍.对于同一管型,在真空Ph=0.068 6 MPa、冷却水Re数5×103～4×104范围内,BGT-1管垂直布置时总传热系数约为水平布置时的0.78～0.87倍.实验结果表明,布置方式、蒸汽凝结负荷及压力是维持珠状凝结持久的重要影响因素.Under the condition of steam condensation outside a horizontal and vertical tube a comparative experimental investigation was conducted for the heat transfer performance of four kinds of experimental tubes. Within the range of tests for a horizontal tube with a condensation condition slightly higher than one atmospheric pressure the total heat transfer factor of tube BGT is about 1.38-1.60 times of that of a bare tube, while the total heat transfer factor of tube BGT-1 is about 2.05-2.16 times of that of a bare tube. For the same tube type within the range of vacuum Ph = 0.0686 MPa and cooling water Re number 5 × 103-4 × 104 the total heat transfer factor of a vertically installed tube BGT-1 is about 0.78-0.87 times of that of a horizontally installed tube. The results of the tests indicate that the layout scheme, steam condensation load and pressure are major influencing factors for maintaining a sustained dropwise condensation.

关 键 词：波槽管 珠状凝结 水质 铜镍合金 

分 类 号：TK124[动力工程及工程热物理—工程热物理]