Multi-Objective Optimization of Different Channel Shapes in Heat Exchangers

Document Type : Research Paper

Authors

Department of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran

Abstract

The effect of geometric parameters of the zigzag, rectangular, and serpentine channels on convective heat transfer coefficient and pressure drop was investigated using computational fluid dynamics (CFD). In all channels, the same boundary conditions were considered, and the number of steps was equal to 10. The simulations were performed for turbulent flows (liquid water as the operating fluid), and Reynolds number (Re) range between 20000 and 60000 was selected. The zigzag channel showed a best thermal performance and the serpentine channel showed the best hydraulic performance. The thermal-hydraulic performance (THP) factor was employed for comparing the channels. As the complexity of the channels surfaces increased, the two parameters of convective heat transfer coefficient (positive factor) and pressure drop (negative factor) increased simultaneously. Therefore, predictive correlations for friction factor and Nusselt number were presented using genetic algorithm (GA), and the multi-objective optimization was performed to obtain the most appropriate Nusselt number and minimum friction factor as the two basic objective functions. The resulting Pareto set, which includes the optimum geometric dimensions of the heat exchangers, allows a designer to choice the geometries based on higher heat transfer or lower pumping power.

Keywords


  1. Salimi S, Beigzadeh R. Computational fluid dynamics study and GA modeling approach of the bend angle effect on thermal-hydraulic characteristics in zigzag channels. Iranian Journal of Chemical Engineering (IJChE). 2019 Sep 1;16(3):70-83.
  2. Beigzadeh R, Parvareh A, Rahimi M. Experimental and CFD Study of the Tube Configuration Effect on the Shell-Side Thermal Performance in a Shell and Helically Coiled Tube Heat Exchanger. Iranian Journal of Chemical Engineering (IJChE). 2015 Apr 1;12(2):13-25.
  3. Ozbolat V, Tokgoz N, Sahin B. Flow characteristics and heat transfer enhancement in 2D corrugated channels. International Journal of Mechanical and Mechatronics Engineering. 2013 Sep 3;7(10):2074-8.
  4. Arvanitis KD, Bouris D, Papanicolaou E. Laminar flow and heat transfer in U-bends: The effect of secondary flows in ducts with partial and full curvature. International Journal of Thermal Sciences. 2018 Aug 1;130:70-93.
  5. Vickers NJ. Animal communication: when i’m calling you, will you answer too?. Current biology. 2017 Jul 24;27(14):R713-5.
  6. Lahimer AA, Alghoul MA, Sopian K, Khrit NG. Potential of solar reflective cover on regulating the car cabin conditions and fuel consumption. Applied thermal engineering. 2018 Oct 1;143:59-71.
  7. Shi H, Raimondi ND, Fletcher DF, Cabassud M, Gourdon C. Numerical study of heat transfer in square millimetric zigzag channels in the laminar flow regime. Chemical Engineering and Processing-Process Intensification. 2019 Oct 1;144:107624.
  8. Chen M, Sun X, Christensen RN. Thermal-hydraulic performance of printed circuit heat exchangers with zigzag flow channels. International Journal of Heat and Mass Transfer. 2019 Mar 1;130:356-67.
  9. Vickers NJ. Animal communication: when i’m calling you, will you answer too?. Current biology. 2017 Jul 24;27(14):R713-5.
  10. Thippavathini S, Das AK. Passage of a Liquid Taylor Drop through Successive Bends in a Rectangular Channel. Industrial & Engineering Chemistry Research. 2020 Oct 9;59(42):19045-61.
  11. Spizzichino M, Sinibaldi G, Romano GP. Experimental investigation on fluid mechanics of micro-channel heat transfer devices. Experimental Thermal and Fluid Science. 2020 Oct 1;118:110141.
  12. Yan WT, Li C, Ye WB. Numerical investigation of hydrodynamic and heat transfer performances of nanofluids in a fractal microchannel heat sink. Heat Transfer—Asian Research. 2019 Sep;48(6):2329-49.
  13. Mitra P, Dutta S, Hens A. Separation of particles in spiral micro-channel using Dean’s flow fractionation. Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2020 Aug;42(8):1-2.
  14. Hassanzadeh R, Abadtalab M, Bayat A. Optimization of Wave Inclination Angle in Parallel Wavy-Channel Heat Exchangers. Arabian Journal for Science and Engineering. 2020 Feb;45(2):817-32.
  15. Abbasi FM, Shehzad SA. Impact of Curvature-Dependent Channel Walls on Peristaltic Flow of Newtonian Fluid Through a Curved Channel with Heat Transfer. Arabian Journal for Science and Engineering. 2020 Nov;45:9037-44.
  16. Morini GL. Single-phase convective heat transfer in microchannels: a review of experimental results. International journal of thermal sciences. 2004 Jul 1;43(7):631-51.
  17. Loew RM. Determinants of divorced older women's labor supply. Research on Aging. 1995 Dec;17(4):385-411.
  18. Zhou J, Ke H, Deng X. Experimental and CFD investigation on temperature distribution of a serpentine tube type photovoltaic/thermal collector. Solar Energy. 2018 Nov 1;174:735-42.
  19. Wang M, Zhu W. Pore-scale study of heterogeneous chemical reaction for ablation of carbon fibers using the lattice Boltzmann method. International Journal of Heat and Mass Transfer. 2018 Nov 1;126:1222-39.
  20. Plouffe P, Roberge DM, Sieber J, Bittel M, Macchi A. Liquid–liquid mass transfer in a serpentine micro-reactor using various solvents. Chemical Engineering Journal. 2016 Feb 1;285:605-15.
  21. Dewan A, Mahanta P, Raju KS, Kumar PS. Review of passive heat transfer augmentation techniques. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy. 2004 Nov 1;218(7):509-27.
  22. Elshafei EA, Mohamed MS, Mansour H, Sakr M. Experimental study of heat transfer in pulsating turbulent flow in a pipe. International Journal of Heat and Fluid Flow. 2008 Aug 1;29(4):1029-38.
  23. Bharadwaj P, Khondge AD, Date AW. Heat transfer and pressure drop in a spirally grooved tube with twisted tape insert. International Journal of Heat and Mass Transfer. 2009 Mar 1;52(7-8):1938-44.
  24. Imran AA, Mahmoud NS, Jaffal HM. Numerical and experimental investigation of heat transfer in liquid cooling serpentine mini-channel heat sink with different new configuration models. Thermal Science and Engineering Progress. 2018 Jun 1;6:128-39.
  25. Omidi M, Farhadi M, Darzi AA. Numerical study of heat transfer on using lobed cross sections in helical coil heat exchangers: effect of physical and geometrical parameters. Energy conversion and management. 2018 Nov 15;176:236-45.
  26. De la Torre R, Francois JL, Lin CX. Optimization and heat transfer correlations development of zigzag channel printed circuit heat exchangers with helium fluids at high temperature. International Journal of Thermal Sciences. 2021 Feb 1;160:106645.
  27. Donaldson AA, Kirpalani DM, Macchi A. Single and two-phase pressure drop in serpentine mini-channels. Chemical Engineering and Processing: Process Intensification. 2011 Aug 1;50(8):877-84.
  28. Korpyś M, Dzido G, Al-Rashed MH, Wójcik J. Experimental and numerical study on heat transfer intensification in turbulent flow of CuO–water nanofluids in horizontal coil. Chemical Engineering and Processing-Process Intensification. 2020 Jul 1;153:107983.
  29. Beigzadeh R, Eiamsa-ard S. Genetic algorithm multiobjective optimization of a thermal system with three heat transfer enhancement characteristics. Journal of Enhanced Heat Transfer. 2020;27(2).
  30. Yang Y, Li H, Yao M, Zhang Y, Zhang C, Zhang L, Wu S. Optimizing the size of a printed circuit heat exchanger by multi-objective genetic algorithm. Applied Thermal Engineering. 2020 Feb 25;167:114811.
  31. Yıldızeli A, Çadırcı S. Multi objective optimization of a micro-channel heat sink through genetic algorithm.
  32. Beigzadeh R, Rahimi M, Parvizi M. Experimental study and genetic algorithm-based multi-objective optimization of thermal and flow characteristics in helically coiled tubes. Heat and Mass Transfer. 2013 Sep;49(9):1307-18.
  33. Rahimi M, Shabanian SR, Alsairafi AA. Experimental and CFD studies on heat transfer and friction factor characteristics of a tube equipped with modified twisted tape inserts. Chemical Engineering and Processing: Process Intensification. 2009 Mar 1;48(3):762-70.
  34. Taler D, Taler J. Simple heat transfer correlations for turbulent tube flow. InE3S Web of conferences 2017 (Vol. 13, p. 02008). EDP Sciences.
  35. Konak A, Coit DW, Smith AE. Multi-objective optimization using genetic algorithms: A tutorial. Reliability engineering & system safety. 2006 Sep 1;91(9):992-1007.