A new kind of asymmetrical finned tube heat exchanger was designed.The heat transfer process and effect of the asymmetrical finned tube were experimentally studied under four working conditions.Moreover

its heat transfer performance was compared with that of the ring-fin tube and smooth tube

through the heat transfer coefficient calculation.The results show that

this asymmetrical finned tube does stronger disturbance to the flow than the ring-fin tube and smooth tube

it has better heat transfer effect than the other two tubes

and with the same heating surface area

it is more compact than the ring-fin tube.