International Journal of Vehicle Structures and Systems

Open Access Open Access  Restricted Access Subscription Access

Heat Transfer Enhancement and Pressure Drop Performance for Fin and Tube Compact Heat Exchangers with Radiantly Arranged Rectangular Winglet-Type Vortex Generators


Affiliations
1 Dept. of Mech. Engg., Gautam Buddha University, Greater Noida, India
 

   Subscribe/Renew Journal


In this paper, heat transfer enhancement has been numerically investigated for fin and tube compact heat exchangers with radiantly arranged rectangular winglets and has been compared with the existing structures. In the proposed structure, there are total 12 winglets, 3 on each tube arranged radiantly with an attack angle of 60° each. Investigation has been carried out on low Reynolds number from 400-800 heat transfer is compared with other structures without winglet as baseline arrangement, prevailing rectangular winglet arrangement and wavy down rectangular winglet arrangement. The simulation results show that the radiantly arranged winglet that guides the fluid from main flow to the wall creates collision and leads to turbulence behind the tube. It is found that newly proposed structure with radiantly arranged winglets has the highest heat transfer rate, as compared to the existing structures and this can replace the previous structures. The heat transfer characteristics and flow structures are numerically investigated in ANSYS.

Keywords

Compact Heat Exchanger, Vortex Generator, Heat Transfer Enhancement, Radiantly Arranged Winglets.
User
Subscription Login to verify subscription
Notifications
Font Size

  • J.Y. Yun and K.S. Lee. 1999. Investigation of heat transfer characteristics on various kinds of fin-and-tube heat exchangers with interrupted surfaces, Int. J. Heat Mass Transf., 42(13), 2375-2385. https://doi.org/ 10.1016/S0017-9310(98)00310-X.

  • M. Fiebig, A. Valencia and N.K. Mitra. 1993. Wing-type vortex generators for fin-and-tube heat exchangers, Exp. Therm. Fluid Sci., 7(4), 287-295. https://doi.org/10.1016/0894-1777(93)90052-K.

  • S. Savino, G. Comini and C. Noninumber 2004. Threedimensional analysis of convection in two-dimensiona l wavy channels, Numer. Heat Transfer Part. A, 46(9), 869-890. https://doi.org/10.1080/10407780490508449.

  • Y. Chen, M. Fiebig and N.Y. Mitra. 2000. Heat transfer enhancement of finned oval tubes with staggered punched longitudinal vortex generators, Int. J. Heat Mass Transf., 43(3), 417-435. https://doi.org/10.1016/S00179310(99)00157-X.

  • G. Biswas, N.K. Mitra and M. Fiebig. 1994. Heat transfer enhancement in fin-tube heat exchangers by winglet type vortex generators, Int. J. Heat Mass Transf., 37(2), 283291. https://doi.org/10.1016/0017-9310(94)90099-X.

  • S. Tiggelbeck and N.K. Mitra, M. Fiebig. 1994. Comparison of wing-type vortex generators for heat transfer enhancement in channel flows, ASME J. Heat Transf., 116(4), 880-885. https://doi.org/10.1115/1.2911462.

  • C. Allison and B. Dally. 2007. Effect of a delta-winglet vortex pair on the performance of a tube-fin heat exchanger, Int. J. Heat Mass Transfer, 50(25-26), 5065-5072. https://doi.org/10.1016/j.ijheatmasstransfer.2007.08.003.

  • K. Torii, K.M. Kwak and K. Nishinumber 2002. Heat transfer enhancement accompanying pressure-loss reduction with winglet-type vortex generators for fintube heat exchangers, J. Heat Mass Trans., 45(18), 3795-3801. https://doi.org/10.1016/S0017-9310(02)00080-7.

  • Y.L. He, P. Chu, W.Q. Tao, Y.W. Zhang and T. Xie. 2013. Analysis of heat transfer and pressure drop for finand-tube heat exchangers with rectangular winglet-type vortex generators, Appl. Therm. Engg., 61(2), 770-783. https://doi.org/10.1016/j.applthermaleng.2012.02.040.

  • M.A. Wahid, A.A. Gholami and H.A. Mohammed. 2013. Numerical study of fluid flow and heat transfer enhancement of nano-fluids over tube bank, Appl. Mech. Mater., 388, 149-155. https://doi.org/10.4028/www.scientific.net/AMM.388.149.

  • ANSYS FLUENT Theory-Guide. 2011. User's Guide and Theory Guide Release 14.0, ANSYS Inc


Abstract Views: 349

PDF Views: 121




  • Heat Transfer Enhancement and Pressure Drop Performance for Fin and Tube Compact Heat Exchangers with Radiantly Arranged Rectangular Winglet-Type Vortex Generators

Abstract Views: 349  |  PDF Views: 121

Authors

Rimjhim Raj Singh
Dept. of Mech. Engg., Gautam Buddha University, Greater Noida, India
H. C. Thakur
Dept. of Mech. Engg., Gautam Buddha University, Greater Noida, India

Abstract


In this paper, heat transfer enhancement has been numerically investigated for fin and tube compact heat exchangers with radiantly arranged rectangular winglets and has been compared with the existing structures. In the proposed structure, there are total 12 winglets, 3 on each tube arranged radiantly with an attack angle of 60° each. Investigation has been carried out on low Reynolds number from 400-800 heat transfer is compared with other structures without winglet as baseline arrangement, prevailing rectangular winglet arrangement and wavy down rectangular winglet arrangement. The simulation results show that the radiantly arranged winglet that guides the fluid from main flow to the wall creates collision and leads to turbulence behind the tube. It is found that newly proposed structure with radiantly arranged winglets has the highest heat transfer rate, as compared to the existing structures and this can replace the previous structures. The heat transfer characteristics and flow structures are numerically investigated in ANSYS.

Keywords


Compact Heat Exchanger, Vortex Generator, Heat Transfer Enhancement, Radiantly Arranged Winglets.

References





DOI: https://doi.org/10.4273/ijvss.10.5.13