RT Journal Article ID 64544cad670408df A1 Laskowski, Rafal A1 Tomczak, Pawel A1 Jaworski, Maciej T1 APPLICATION OF ENTROPY GENERATION MINIMIZATION FOR OPTIMIZING THE GEOMETRY OF A DOUBLE-TUBE HEAT EXCHANGER JF Heat Transfer Research JO HTR YR 2017 FD 2017-10-10 VO 48 IS 11 SP 955 OP 968 K1 double-tube heat exchanger K1 entropy generation K1 tube diameter K1 Second Law analysis K1 heat transfer AB The paper presents an analysis of entropy generation for a double-tube heat exchanger with water as heat transferring fluids. Four heat exchanger configurations were considered: with the heating fluid in the inner and outer tubes, and with parallel and counter flows. The aim of the analysis was to determine the tube inner [inner tube] diameter for which entropy generation is minimum. The entropy generation resulting from heat flow and from resistance to flow (pressure losses) of heat transferring fluids were taken into account. The minimum of entropy generation as a function of the inner tube diameter was found for two cases: for the counter and parallel flows when the cold fluid flows through the inner tube and the hot fluid passes through the space between the tubes. For two other cases of the counter and parallel flows when the hot fluid flows through the inner tube and the cold fluid passes through the space between the tubes, entropy generation is approximately linearly decreasing with the increase in the inner tube diameter, and there is no entropy generation extremum (minimum) in the range of dimensions analyzed in the study. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,11a0dcd27ac6ab7d,64544cad670408df.html