The Heat Transfer and Pressure Drop Characteristics of the Finned Tube Banks in Forced Convection : Comparison of the Pressure Drop Characteristics between Spiral Fin and Serrated Fin

In recent years the requirement for reduction of energy consumption have been increasing to solve the problems of the global warming and the short of petroleum resources. For example in the power generation field, as the thermal power generation occupied 60% of the power generation demand, the improvement of the thermal efficiency is required considerably. This paper described that the pressure drop characteristics of the finned tube banks used for the heat exchanger in the thermal power generation were clarified by testing the serrated finned tubes banks for improvement of higher heat transfer and the conventional spiral finned tube banks under the same test conditions, and that the equations to predict pressure drop coefficient which is necessary to design the heat exchanger were proposed