中文摘要：

为了改进立式冷凝器的性能，对强化凝结传热性能的三分螺旋折流板疏液结构形式进行了试验研究.试验立式冷凝器采用公用壳体可置换芯体结构，比较分析了6件三分螺旋折流板芯体和1件弓形折流板芯体的壳侧凝结换热性能.结果表明：三分螺旋折流板立式冷凝器的壳侧换热系数是弓形折流板方案壳侧换热系数的1.48~2.65倍，其中最佳的双头变角度带挡液堰方案的壳侧换热系数比弓形折流板壳侧换热系数平均提高了144.4%;单头变角度方案壳侧换热系数比单头定角度方案壳侧换热系数平均提高25.47%;双头变角度方案壳侧换热系数比单头变角度方案壳侧换热系数平均提高15.74%;带挡液堰方案壳侧换热系数比不带挡液堰方案壳侧换热系数平均提高6.37%.

英文摘要：

To improve the condensation heat transfer performance of vertical condensers,the experiment about condensation heat transfer performance of the shell side was conducted on the enhancement features of trisection helical baffles with different liquid draining structures.The studied vertical condenser used a common shell with replaceable cores,and the testing cores included six trisection helical baffle tube bundles and a segment one.The experimental results show that the shell side condensation heat transfer coefficient of the vertical trisection helical baffle condensers is1.48to2.65times than that of the segment one,in which the shell side heat transfer coefficient in the best scheme adopting dual-thread and variable angled baffles with liquid dam increases144.4%than that of the segment one.The shell side heat transfer coefficients in single thread variable angle schemes are,on average,25.47%higher than the corresponding single thread single angle ones;the shell side heat transfer coefficient in the dual-thread variable angle helical baffle schemes is,on average,15.74%higher than the corresponding single-thread variable angle ones;and the shell side heat transfer coefficientsin the helical baffle schemes with liquid dam are,on average,6.37%higher than the corresponding ones without liquid dam.