竖管降膜蒸发器分布器的实验研究.pdfVIP

31 3 Vol. 31, No . 3 20 10 6 Journal of Hebei University of Science and T echnolo y June 20 10 : 2010) 朱玉峰 ( 河北科技大学机械电子工程学院, 河北石家庄 050018) : 为获得适用于竖管降膜蒸发器的高 液体分布器, 对不同结构参数的齿型分布器锥型分 布器和螺旋型分布器进行了冷膜和热膜实验实验结果表明: 通过改变螺旋型分布器的结构参数, 可使其具有较高的操作弹性以适应不同需要, 但压力损失较大当用于光管降膜蒸发器时, 螺旋型 分布器的总传热系数明显高于齿型分布器和锥型分布器的总传热系数综合分析得出螺旋型分布 器的综合性能最优 : 降膜蒸发器; 液体分布器; 布膜器; 降膜蒸发 + : T Q051. 6 2 : A Experimental study on liquid distributors for fallin film evaporator ZHU Yufen ( Colle e of Mechanical and Electronic En ineerin , H ebei University of Science and T echnolo y, Shijiazhuan Hebei 050018, China) Abstract: The coolfilm experiments and hotfilm experiments are carried out for toothtype distributors, conetype distribu tors and screwtype distributors w ith different structure parameters, in order to obtain an hi heffect liquid distributor to be used in a verticaltube fallin film evaporator. The experimental results show that the variations of structure parameters of screwt ype distribut ors can make it hi hly flex ible and adaptable to the various requirements, but its head loss is hi her. T he o verall heat transfer coefficient of the screwtype dist ributor is obviously reater than those of the toot htype distributor and the conetype distributor w hen it is used in a smoothtube fallin film evaporator . Above all, the synthetical capability of the screw type dist ributor is optimal. Key words: fallin film evaporator ; liquid distributor ; liquid distributor; fallin film evaporation , , , , , [ 13] , , , , ,