The Heat Transfer and Pressure Loss Characteristics of the Heat Exchanger for Recovering Latent Heat: Effects of Straight Fin Length and Fin Pitch on the Heat Transfer and Pressure Loss Characteristics

In recent years the requirement for reduction of energy consumption has been increasing to solve the problems of the global warming and the shortage of petroleum resources. The latent heat recovery type heat exchanger is one of the effective methods in order to improve thermal efficiency by recovering latent heat. This paper described that the heat transfer and pressure loss characteristics of the latent heat recovery type heat exchanger having straight fin (fin length : 65 mm or 100 mm, fin pitch : 2.5 mm or 4 mm) were clarified by measuring the exchange heat quantity, the pressure loss of heat exchanger, and the heat transfer coefficient between outer fin surface and gas, and that the effects of fin length and fin pitch on heat transfer and pressure loss characteristics were clarified. Furthermore the equations for predicting the heat transfer coefficient and pressure loss which are necessary on design of the heat exchanger were proposed.