PERFORMANCE ANALYSIS OF DOUBLE-PIPE FINED HEAT EXCHANGER

Double-pipe heat exchanger as simplest solution of this heat transfer devices has found application in chemical industry for almost one century.There exists a variety of constructions of such heat exchangers such as double-pipe straight heat exchanger, double-pipe U-tube heat exchangers and multitube units. All this constructions might be equiped with fins in order to increase heat transfer. Fins applied for these purpose might be of longitudinal, circular, helical or other forms. Current paper tends to bring new insight regarding the optimization of double-pipe heat exchanger with longitudinal fins. Apart of analysis of thermal performance and fluid dynamic characteristics, an analysis from view point of thermodynamical irreversibilities and the overall heat exchanger performance is provided. The optimization aspects are discussed from view point of different equivalent diameter of annulus space, different flow length and different number of fins employed.