The radiator's structure affects performance of the air cooling condensers to a great extent.Thus

two direct air cooling heat exchanger elements of double-row tubes with different fine types were taking as the example to conduct performance experiments.The results show that

with an increase in face velocity

both the heat transfer coefficient of heat exchanger components and the air resistance increase gradually

while the growth rate of heat transfer coefficient decreases and that of the air resistance rises.When the face velocity is lower than 2m/s

the heat transfer coefficients of the two elements are basically the same.While when the face velocity is higher than 2m/s

the heat transfer coefficient of the element with large fin size is obviously greater than that with small fin size

and the difference between them increases with the face velocity.In practical application

the face velocity

fin size and finned ratio should be optimized to enhance the thermal performance of air cooling condensers.