In order to improve uneven distribution of the bubbles in the guided bubble pump with multiple tubes in a working process

and enhance the performance of Einstein refrigeration

the performance of an ordinary guided bubble pump with multiple tubes and guided bubble pump with multiple tubes with current equalizer is compared. The experiment is conducted at atmospheric pressure with water as the working fluid

and the number of tubes in guided bubble pump is varied. Experimental results show that in the lifting process of the bubble pump the total lifting capacity increases in amplitude for two kinds of bubble pumps

and large improvement and little improvement appear alternately under low power. However

the elapsed time for little improvement of total lifting capacity is decreased for a bubble pump under high power. When tube number is 3

the diameter is 10 mm with an immersion ratio of 0.5

and a heating power of 450 W

water begins to exit from the outlet tube after 75.2 min. The lifting capacity between large and little improvement appear alternately from 75.2 min to 100.1 min. In addition

the problem of uneven distribution of the bubbles is improved by the tube number multiplication with a current equalizer

such as a diameter of 10 mm and immersion ratio of 0.4. When tube number is 1

the maximum liquid lifting capacity rate is 15.00 g/s in an ordinary guided bubble pump with multiple tubes; when the tube number is 3

maximum liquid lifting capacity rate is 26.50 g/s for the ordinary

but 36.50 g/s for that with current equalizer. Finally

mesh aperture and installation position of current equalizer are found to have a certain influence on the improvement of bubble pump performance.