Abstract: Condensation heat transfer of gasoline-air mixture gas，with non-condensable gas mass quantity of 2%～13%，in horizontal inner coil tube was investigated through comparison with inner smooth tube. Results showed that the condensation heat transfer in coil tube is diminished when the content of noncondensable gas increases，and the average of condensation heat transfer in coil tube is higher than that in smooth tube. The condensation heat transfer coefficient could be predicted by Re and Co of liquid film，and a experimental correlation for condensation heat transfer coefficient in coil tube was established.

摘要： 采用实验的方法，研究了空气质量含量在2%～13%范围内，汽油蒸气在水平螺旋扁管内的凝结换热，并与同样条件下水平光管内的凝结换热进行了对比分析。实验结果表明，随着不凝气体质量含量的增加，螺旋扁管内的凝结换热减弱，在相同条件下，螺旋扁管的平均换热系数高于光管。同时，提出了水平螺旋扁管内凝结换热的实验关联式。