Based on the model of separated phase flow in two-phase flow

a bubble pump performance test system with water as the working fluid was built to study the performance of guided bubble pump at atmospheric pressure with different lift-tube diameter by theoretical and experimental method. The bubble pump performance is studied under the condition of heating power in 100 ~ 650 W

immersion ratio between 0.2 ~ 0.4

riser diameter at 7 mm

9 mm

11 mm

13 mm and 16 mm

and riser length at 600 mm. The results show that the submergence ratio plays a key role for the lifting capacity of bubble pump; Ascension within a certain range lift-tube diameter can significantly improve the liquid lifting capacity; when the pipe diameter exceeds critical value

not only the liquid lifting capacity is reduced

the bubble pump efficiency is also sharply reduced. It can be seen from the cases that the lifting capacity difference of 11 mm and 16 mm can reach to10.23 g/s

and lifting capacity is decreased by 61.15% while the pipe diameter increases by 5 mm when the heating power is 300W.