The Heat Transfer Characteristics of the Finned Tube Banks in Forced Convection : Comparison of the Heat Transfer 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 shortage 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 heat transfer 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 equation to predict heat transfer coefficient which is necessary on design of the heat exchanger was proposed