CFD Air Flow Evaluation of Finned Tube Evaporator for Refrigerated Display Cabinet Application
DOI:
https://doi.org/10.37934/cfdl.16.9.5263Keywords:
Air side heat transfer coefficient, air flow characteristic, finned tube evaporator, numerical modellingAbstract
This study is aimed to develop a simulation to improve the performance of the finned tube evaporator which is applied to the refrigerated display cabinet. CFD model was developed to be able to analyse the characteristics of air flow inside the fin gap and air side heat transfer coefficient. Geometry of the model of overall finned tube evaporator is considered covering two aluminium wavy fins with an air flow in between, combination of staggered cooper tubes with refrigerant flow inside. Fin gap is designed 4 mm to anticipate frost on the fin surface that can block air flow. Turbulence models used in the study is the realizable k-ε turbulence which had the best performance turbulence model and it was validated with secondary data from previous studies and shows the lowest error only 5.9 %. The use of CFD was found to be sufficiently representative of the heat transfer characteristics of evaporators, and acted as an effective simulation tool to determine the heat transfer coefficient in order to improve efficiency in terms of improved design. The characteristics of air flow between the fin gap and around the tube was obtained various and complex. In the case study the entry velocity of 1.7 m /s at the highest turbulence condition of the first row can reach speeds of 2.75 m/s. Hight turbulence regime in flow can indicate higher the heat transfer coefficient of the evaporator.
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Santosa, IDewa MC, and ING Suta Waisnawa. "Performance analysis of transcritical CO2 refrigeration system for supermarket application." GEOMATE Journal 15, no. 50 (2018): 70-75. https://doi.org/10.21660/2018.50.IJCST1
Santosa, I. D. M. C., I. G. N. S. Waisnawa, P. W. Sunu, and I. W. Temaja. "Simulation of transcritical CO2 refrigeration system with booster hot gas bypass in tropical climate." In Journal of Physics: Conference Series, vol. 953, no. 1, p. 012044. IOP Publishing, 2018. https://doi.org/10.1088/1742-6596/953/1/012044
Ahammed, Md Ezaz, Souvik Bhattacharyya, and M. Ramgopal. "Thermodynamic design and simulation of a CO2 based transcritical vapour compression refrigeration system with an ejector." International journal of refrigeration 45 (2014): 177-188. https://doi.org/10.1016/j.ijrefrig.2014.06.010
Choi, Jong Min, Yonghan Kim, Mooyeon Lee, and Yongchan Kim. "Air side heat transfer coefficients of discrete plate finned-tube heat exchangers with large fin pitch." Applied Thermal Engineering 30, no. 2-3 (2010): 174-180. https://doi.org/10.1016/j.applthermaleng.2009.08.001
Da Silva, Diogo L., Christian JL Hermes, and Claudio Melo. "First-principles modeling of frost accumulation on fan-supplied tube-fin evaporators." Applied Thermal Engineering 31, no. 14-15 (2011): 2616-2621. https://doi.org/10.1016/j.applthermaleng.2011.04.029
Yaïci, Wahiba, Mohamed Ghorab, and Evgueniy Entchev. "3D CFD study of the effect of inlet air flow maldistribution on plate-fin-tube heat exchanger design and thermal–hydraulic performance." International Journal of Heat and Mass Transfer 101 (2016): 527-541. https://doi.org/10.1016/j.ijheatmasstransfer.2016.05.063
Banu, PS Arshi, DNS Ramesh Lohith, M. Praveen Kalyan, Dilip Sai Vempati, and B. Hemanth Sai. "Simulation of fin and tube heat exchanger and validation with CFD analysis." Materials Today: Proceedings 66 (2022): 1471-1476. https://doi.org/10.1016/j.matpr.2022.05.552
Zhang, Guohui, Baolong Wang, Xianting Li, Wenxing Shi, and Yang Cao. "Review of experimentation and modeling of heat and mass transfer performance of fin-and-tube heat exchangers with dehumidification." Applied Thermal Engineering 146 (2019): 701-717. https://doi.org/10.1016/j.applthermaleng.2018.10.032
Halim, Sufi Suraya, Md Tasyrif Abdul Rahman, Abdul Hamid Adom, Muhammad Sofwan Mohamad, Azizul Mohamad, and Nasrul Amri Mohd Amin. "Intake Manifold Material Selection and Fluid Flow Analysis for Formula Society of Automotive Engineers (FSAE) Race Car." CFD Letters 15, no. 5 (2023): 18-28. https://doi.org/10.37934/cfdl.15.5.1828
Rossetti, A., S. Minetto, and S. Marinetti. "A simplified thermal CFD approach to fins and tube heat exchanger: Application to maldistributed airflow on an open display cabinet." international journal of refrigeration 57 (2015): 208-215. https://doi.org/10.1016/j.ijrefrig.2015.05.014
Gaspar, Pedro Dinis, LC Carrilho Gonc¸ alves, and Xiao Ge. "Influence of ambient air velocity orientation in thermal behaviour of open refrigerated display cabinets." In Engineering Systems Design and Analysis, vol. 49163, pp. 453-462. 2010. https://doi.org/10.1115/ESDA2010-24124
Gaspar, Pedro Dinis, LC Carrilho Gonçalves, and R. A. Pitarma. "Detailed CFD modelling of open refrigerated display cabinets." Modelling and Simulation in Engineering 2012 (2012): 9-9. https://doi.org/10.1155/2012/973601
Gaspar, Pedro Dinis, LC Carrilho Gonçalves, and R. A. Pitarma. "CFD parametric studies for global performance improvement of open refrigerated display cabinets." Modelling and Simulation in Engineering 2012 (2012): 54-54. https://doi.org/10.1155/2012/867820
Khan, Umair, William Pao, Nabihah Sallih, and Farruk Hassan. "Flow Regime Identification in Gas-Liquid Two-Phase Flow in Horizontal Pipe by Deep Learning." Journal of Advanced Research in Applied Sciences and Engineering Technology 27, no. 1 (2022): 86-91. https://doi.org/10.37934/araset.27.1.8691
Oliet, C., C. D. Pérez-Segarra, J. Castro, and A. Oliva. "Modelling of fin-and-tube evaporators considering non-uniform in-tube heat transfer." International journal of thermal sciences 49, no. 4 (2010): 692-701. https://doi.org/10.1016/j.ijthermalsci.2009.11.009
Enam, Samin, Muhammad Noor Afiq Witri Muhammad, and Nor Azwadi Che Sidik. "Numerical Investigation on The Effect of Grille Blockage Ratio on Air Flow Characteristics of Air Vents." CFD Letters 14, no. 10 (2022): 32-41. https://doi.org/10.37934/cfdl.14.10.3241
Wang, Enhua, Hongguang Zhang, Boyuan Fan, Minggao Ouyang, Kai Yang, Fuyuan Yang, Xiaojuan Li, and Zhen Wang. "3D numerical analysis of exhaust flow inside a fin-and-tube evaporator used in engine waste heat recovery." Energy 82 (2015): 800-812. https://doi.org/10.1016/j.energy.2015.01.091
Kumar, Ankur, Jyeshtharaj B. Joshi, Arun K. Nayak, and Pallippattu K. Vijayan. "3D CFD simulations of air cooled condenser-II: Natural draft around a single finned tube kept in a small chimney." International Journal of Heat and Mass Transfer 92 (2016): 507-522. https://doi.org/10.1016/j.ijheatmasstransfer.2015.07.136
Ibrahim, Muhammad Fatih, Mohd Faizal Mohamad, Naoki Ikegaya, and Azli Abd Razak. "Numerical Investigation of Flow and Dispersion over Two-Dimensional Semi-Open Street Canyon." CFD Letters 15, no. 2 (2023): 53-70. https://doi.org/10.37934/cfdl.15.2.5370
Santosa, I. D. M. C., IGN Suta Waisnawa, and I. W. Temaja. "Engineering Equation Solver (EES) Computer Simulation For CO 2 Refrigeration Performance." In 2018 International Conference on Applied Science and Technology (iCAST), pp. 728-731. IEEE, 2018. https://doi.org/10.1109/iCAST1.2018.8751503
Abobaker, Mostafa, Sogair Addeep, Lukmon O. Afolabi, and Abdulhafid M. Elfaghi. "Effect of Mesh Type on Numerical Computation of Aerodynamic Coefficients of NACA 0012 Airfoil." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 87, no. 3 (2021): 31-39. https://doi.org/10.37934/arfmts.87.3.3139
Kumar, Mukund, and Satish Kumar. "CFD Analysis of Fly Ash Slurry Flow Across Horizontal Pipe." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 104, no. 2 (2023): 153-160. https://doi.org/10.37934/arfmts.104.2.153160
Alfarawi, Suliman SS, Azeldin El-sawi, and Hossin Omar. "Exploring Discontinuous Meshing for CFD Modelling of Counter Flow Heat Exchanger." Journal of Advanced Research in Numerical Heat Transfer 5, no. 1 (2021): 26-34.
Santosa, IDewa MC, Baboo L. Gowreesunker, Savvas A. Tassou, Konstantinos M. Tsamos, and Yunting Ge. "Investigations into air and refrigerant side heat transfer coefficients of finned-tube CO2 gas coolers." International Journal of Heat and Mass Transfer 107 (2017): 168-180. https://doi.org/10.1016/j.ijheatmasstransfer.2016.11.011
Morales-Fuentes, A., and Y. A. Loredo-Sáenz. "Identifying the geometry parameters and fin type that lead to enhanced performance in tube-and-fin geometries." Applied Thermal Engineering 131 (2018): 793-805. https://doi.org/10.1016/j.applthermaleng.2017.12.057
Wen, Mao-Yu, and Ching-Yen Ho. "Heat-transfer enhancement in fin-and-tube heat exchanger with improved fin design." Applied Thermal Engineering 29, no. 5-6 (2009): 1050-1057. https://doi.org/10.1016/j.applthermaleng.2008.05.019
Taler, Dawid, and Paweł Ocłoń. "Thermal contact resistance in plate fin-and-tube heat exchangers, determined by experimental data and CFD simulations." International Journal of Thermal Sciences 84 (2014): 309-322. https://doi.org/10.1016/j.ijthermalsci.2014.06.001
Morales-Fuentes, A., O. M. Chapa-Contreras, S. Méndez-Díaz, and J. M. Belman-Flores. "Analysis of the heat transfer area distribution in a frosted plain fin-and-tube geometry." International Journal of Refrigeration 75 (2017): 26-37. https://doi.org/10.1016/j.ijrefrig.2017.01.016
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