Improvement of Plate-Fin Heat Exchanger Performance with Assistance of Various Types of Vortex Generator
DOI:
https://doi.org/10.37934/cfdl.15.7.131147Keywords:
plate fin-heat exchangers, ORT fin, vortex generator, rectangular winglet pair, delta winglet pair, trapezoidal winglet pair, CFDAbstract
A 3-dimensional incompressible laminar flow and heat-transfer in a plate-fin heat exchanger (PFHE) where investigated numerically in this article. The influence of mounting a longitudinal vortex generator (LVG) on the offset rectangular-triangular fin (ORT) in the PFHE, on thermal and hydro-dynamic fields are presented. The novelty of this study is by attaching a LVG to an offset strip fin (OSF) surface. The cases of study for the PFHE are established, by using a built-in rectangular winglet pair type RWP longitudinal vortex generator carried out and fitted on this fin to improve the convective heat transfer of the (ORT) fin while minimizing pressure loss. The upper and lower plates are exposed to constant heat flux and the working fluid is air where chosen under a laminar range of RE (600 to 1400). The laminar flow and heat-transfer are governed by continuity, momentum and energy equations. ANSYS FLUENT (2021 R1) is used to get the numerical results, based on the finite volume method. The performance of the VG is assessed for an optimum winglet attack angle (45°), as well as by modifying the geometrical size parameters, namely the height and placement (L) of the RWP LVG. The result shows that the Nusselt number reaches its optimum enhancement values by using a common flow up CFU built-in rectangular winglet pair type RWP VG with a height and entrance length of (h=1.25mm, L=0.5mm), by 22.23% as compared with base case configuration (ORT). Finally, a two more LVG are tested with the optimum conditions of the RWP, which they are a delta winglet pair (DWP) and trapezoidal winglet pair (TWP). In addition, the temperature fields for the primary and secondary flows were shown in contour and streamline diagrams
Downloads
References
Brockmeier, U., T. H. Guentermann, and M. Fiebig. "Performance evaluation of a vortex generator heat transfer surface and comparison with different high performance surfaces." International journal of heat and mass transfer 36, no. 10 (1993): 2575-2587. https://doi.org/10.1016/S0017-9310(05)80195-4
Abed, Ammar A., and Wissam H. Khalil. "A Numerical Study of the Heat Transfer and Fluid Flow in Different Shapes of Microchannels." Al-Nahrain Journal for Engineering Sciences 19, no. 1 (2016): 66-75.
Gupta, M., K. S. Kasana, and R. Vasudevan. "A numerical study of the effect on flow structure and heat transfer of a rectangular winglet pair in a plate fin heat exchanger." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 9 (2009): 2109-2115. https://doi.org/10.1243/09544062JMES1405
Ganesh, N., Hema Kumar Theertham, and Sundararaj Senthilkumar. Heat Transfer Augmentation of Compact Plate Fin Heat Exchanger Using Modified Fin Surfaces. No. 2018-28-0012. SAE Technical Paper, 2018. https://doi.org/10.4271/2018-28-0012
Ebrahimi, Amin, and Saeid Kheradmand. "Numerical simulation of performance augmentation in a plate fin heat exchanger using winglet type vortex generators." International Journal of Mechanical Engineering and Mechatronics 1, no. 2 (2012): 109-121. https://doi.org/10.11159/ijmem.2012.014
Gupta, Munish, K. S. Kasana, and R. Vasudevan. "Heat transfer augmentation in a plate‐fin heat exchanger using a rectangular winglet." Heat Transfer—Asian Research 39, no. 8 (2010): 590-610. https://doi.org/10.1002/htj.20318
Khoshvaght-Aliabadi, Morteza. "Thermal performance of plate-fin heat exchanger using passive techniques: vortex-generator and nanofluid." Heat and Mass Transfer 52, no. 4 (2016): 819-828. https://doi.org/10.1007/s00231-015-1603-6
Vasudevan, R., V. Eswaran, and G. Biswas. "Winglet-type vortex generators for plate-fin heat exchangers using triangular fins." Numerical Heat Transfer: Part A: Applications 38, no. 5 (2000): 533-555. https://doi.org/10.1080/104077800750020423
Sachdeva, Gulshan, K. S. Kasana, and R. Vasudevan. "Heat transfer enhancement by using a rectangular wing vortex generator on the triangular shaped fins of a plate‐fin heat exchanger." Heat Transfer—Asian Research: Co‐sponsored by the Society of Chemical Engineers of Japan and the Heat Transfer Division of ASME 39, no. 3 (2010): 151-165. https://doi.org/10.1002/htj.20285
Sachdeva, Gulshan, R. Vasudevan, and K. S. Kasana. "Computation of heat transfer enhancement in a plate‐fin heat exchanger with triangular inserts and delta wing vortex generator." International journal for numerical methods in fluids 63, no. 9 (2010): 1031-1047. https://doi.org/10.1002/fld.2113
Gupta, M., and K. S. Kasana. "Numerical study of heat transfer enhancement and fluid flow with inline common‐flow‐down vortex generators in a plate‐fin heat exchanger." Heat Transfer—Asian Research 41, no. 3 (2012): 272-288. https://doi.org/10.1002/htj.20414
Khalaf, Abbas Fadhil, Farhan Lafta Rashid, Ali Basem, and Mohammed H. Abbas. "Mathematical Modelling of Engineering Problems." Journal homepage: http://iieta. org/journals/mmep 9, no. 6 (2022): 1639-1647. https://doi.org/10.18280/mmep.090532
Samadifar, Mohammad, and Davood Toghraie. "Numerical simulation of heat transfer enhancement in a plate-fin heat exchanger using a new type of vortex generators." Applied Thermal Engineering 133 (2018): 671-681. https://doi.org/10.1016/j.applthermaleng.2018.01.062
] H. Mahdi. Numerical and Experimental study of Enhancement of heat transfer in Roughened Ribbed Duct. PHD thesis, Department of technical Eduction, University of technology, Iraq, 2004.
Versteeg, H. K., and W. Malalasekera. "An introduction to Computational Fluid Dynamics Prentice Hall." (1995).
Saysroy, A., and S. Eiamsa-Ard. "Enhancing convective heat transfer in laminar and turbulent flow regions using multi-channel twisted tape inserts." International Journal of Thermal Sciences 121 (2017): 55-74. https://doi.org/10.1016/j.ijthermalsci.2017.07.002
Nabil, Rand, and Ali Sabri. "A review on the modification of circular fin and tube heat exchangers through new innovative fin shapes." International Journal of Advanced Technology and Engineering Exploration 9, no. 93 (2022): 1222. https://doi.org/10.19101/IJATEE.2021.875888
Abbas, Noor Y., Ahmed W. Mustafa, and Mohammed Kheir Aldeen Abbas Askera. "Constructal Design of Heat Exchangers: A Review." International Journal of Advances in Engineering and Management 3: 27-40.
Abbas, Ali Sabri, and Ayad Ali Mohammed. "Enhancement Of Plate-Fin Heat Exchanger Performance with Aid of Various Types of Fin Configurations: A Review." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 99, no. 2 (2022): 48-66. https://doi.org/10.37934/arfmts.99.2.4866
Fluent Corp., Fluent 2021 R1 User Guide Manual, Fluent Press, New Hampshire, 2021.
Yang, Huizhu, Jian Wen, Simin Wang, and Yanzhong Li. "Effect of fin types and Prandtl number on performance of plate-fin heat exchanger: Experimental and numerical assessment." Applied Thermal Engineering 144 (2018): 726-735. https://doi.org/10.1016/j.applthermaleng.2018.08.063.
Niknahad, Ali. "Numerical study and comparison of turbulent parameters of simple, triangular, and circular vortex generators equipped airfoil model." Journal of Advanced Research in Numerical Heat Transfer 8, no. 1 (2022): 1-18.
Shlash, Bassam Amer Abdulameer, and Ibrahim Koç. "Turbulent fluid flow and heat transfer enhancement using novel Vortex Generator." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 96, no. 1 (2022): 36-52. https://doi.org/10.37934/arfmts.96.1.3652.
