- Dicle Üniversitesi Mühendislik Fakültesi Dergisi
- Cilt: 16 Sayı: 4
- Multi-objective optimization of axially flat finned cam-shaped and elliptical tube banks based on en...
Multi-objective optimization of axially flat finned cam-shaped and elliptical tube banks based on entropy generation and thermal hydraulic performance
Authors : Mehmet Özkarakoç, Muhammet Nasıf Kuru
Pages : 1059-1066
Doi:10.24012/dumf.1809125
View : 49 | Download : 79
Publication Date : 2025-12-30
Article Type : Research Paper
Abstract :The use of different tube geometries in tube bank heat exchangers has a significant impact on thermal hydraulic performance and entropy generation. This study determined the geometric dimensions and operating conditions of a tube bank with in-line arrangement of cam-shaped and elliptical tubes with axially fins using a numerical optimization method. In order to maintain equal heat transfer surface areas, equivalent diameters (D_e=12.7 mm) were assumed for the tube geometries (cam and elliptical). The longitudinal (N_L ) and transversal (N_T ) configurations consist of four tubes. Diagrams of the multi-objective optimization workflow were established for two different tube geometries. The objective functions selected here were the reduction of entropy generation S_gen and the increase in thermal hydraulic performance (THP). The geometric optimization variables were the transversal tube spacing (y_interval ), longitudinal tube spacing (x_interval ) and longitudinal fin length (L_fin ), which varied within the ranges D_e⁄4 and D_e, respectively. The average velocity at the channel inlet V_in was used as the optimization variable for the operating condition and varies within the range 1 m/sORIGINAL ARTICLE URL