Experimental Investigation of Heat Transfer and Resistance Characteristics of a Finned Oval-Tube Heat Exchanger With Different Air Inlet Angles

Effect of front air attack angles on heat transfer coefficient of the cross‐flow of four flat tube

“…The results illustrated that the change of attack angles with lower aspect ratios of the tube had affected thermal‐flow characteristics more than the attack angle change of higher tube aspect ratios. This has been reviewed by Du et al 23 here. The reviews focused on the impact of different inlet angles of air on the performance of thermofluid characteristics in a heat exchanger, and the experiment investigated a finned oval‐tube heat exchanger with the inclined air incoming flow direction.…”

Numerical analysis of thermal-hydraulic characteristics on serrated fins with different attack angles and wavelength to fin length ratio

“…Apparently, when α=0° and β=0°, the fins type is LPD; when α=90° and β=0°, the fins type is HPD; when α and β are any angles except for 0° and 90°, the fins type is MPD. As for MPD-α type fins, Du et al [14] studied the performance of the heat transfer and pressure drop of a heat exchanger with different air inlet angles (30°, 45°, 60°, and 90°). Among the four included angles, the performance at 45° is the best one under the same mass flow rate criterion and pressure criterion.…”

Heat Transfer Enhancement of the Air-Cooling Tower with Rotating Wind Deflectors under Crosswind Conditions

“…While extensive studies have explored air-cooled heat exchangers [4,[15][16][17][18][19][20][21] and air-cooling towers [7,[22][23][24][25][26], few have looked at air-cooling towers with rotating wind deflectors. To investigate the effects of rotating wind deflectors on the air flow and heat transfer performance in air-cooling towers, an experimental system based on a surface condenser aluminum exchanger (SCAL)-type indirect air-cooling tower has been established with a 1:100 proportional reduction according to the similarity principle, and 3-D numerical models of the prototype indirect air-cooling tower have been built.…”