They have different air inlet directions. In the cross flow cooler, the air is introduced from the side of the tower and flows horizontally, making a right angle to the direction of spray water. However, in the counter flow cooler, the air is introduced at the bottom of the tower and flows from bottom to top, in the opposite direction of spray water. Cross flow cooling tower is equipped with access doors and channels in the middle of the tower, while the counter flow cooling tower does not. In the counter flow cooling tower, coil or tubular bundle serves as heat transfer, however, in the cross flow cooling tower, a combination of coil and packing or a combination of tube bundle and packing serves as heat transfer.
