具有短管束的小型分离式热管的工作特性  

Working characteristics of small separated heat pipes

作　　者：时晓燕[1] 唐志伟[2] 魏加项[2] 蒋章焰[3] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]北京工业大学环境与能源工程学院,北京100022 [3]中国科学院工程热物理研究所,北京100080

出　　处：《中国农业大学学报》2003年第6期51-53,65,共4页Journal of China Agricultural University

基　　金：北京市科委科技项目专题

摘　　要：小型分离式热管的内部沸腾、流动和凝结换热过程及其影响因素与大、中型分离式热管有较大的差异 ,为获得其最佳工作参数 ,利用自行设计的带有短管束的试验装置进行了试验研究。工作温度 12 5～ 170℃ ,热流密度19 87～ 34 37kW·m-2 ;测定 6种不同充液率下平均沸腾换热系数和凝结换热系数随热流密度和工作温度的变化情况。试验结果表明 ,在本试验条件下 ,小型分离式热管的最佳充液率按管束总容量计为 16 %～ 36 % ;按蒸发段总容量计为 4 5 %～ 6 0 %。根据试验结果拟合出最佳充液率 (2 5 % ,按管束总容量计 )下的蒸发段平均沸腾换热系数经验公式 ,及同样工况下冷凝段凝结换热努赛尔数综合关系式。The heat exchanging course of inner boiling,fluxion and coagulate in small separated heat pipes are very different with those in bigger ones. For the sake of getting optimal working characteristics, some experimental studies were carried out to the small separated heat pipes with short canals. The studies were taken under the following conditions: the temperature were between 125 and 170*!℃ and the heat current was between 19.87 and 34.37*!kW·m -2. The diversification of α e (average boiling heat exchanging coefficient) and α c (average coagulation heat exchanging coefficient) along with the q(heat fluxion) and working temperature were measure in 6 different filling liquid ratio test conditions. According to the results of the experiments, the most optimum filling liquid ratio(which is 25%,by all capacity of pipes), and the average coefficient of boiling heat exchanging in evaporator and the synthetical equation of coefficient of heat exchanging Nusselt in condenser were developed.

关 键 词：短管束 分离式热管 工作特性 换热 充液率 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]