ABSTRACT
The study is conducted around a heat exchanger, its channel is horizontal rectangular, its upper wall is isothermal, while its lower wall is thermally insulated, containing extended surfaces in the form of triangular obstacles attached in a staggered manner periodically. Four models of the channel with various roughnesses were compared in this study. Square, triangular Type 1, triangular Type 2, and triangular Type 3 roughnesses, which are positioned on the hot top part of the channel (absorber), downstream of the last obstacle, are examined to promote heat transfer between the absorber and the heat transfer fluid. The case of triangular roughness (Type 3) is the optimal case in terms of improved heat transfer. Moreover, it shows a significant decrease in terms of friction values.
KEYWORDS
PAPER SUBMITTED: 2022-05-16
PAPER REVISED: 2022-06-04
PAPER ACCEPTED: 2022-06-10
PUBLISHED ONLINE: 2023-04-08
- Amraoui, M. A., Aliane, K., The 3-D Analysis of Air-flow in a Flat Plate Solar Collector, Periodica Polytechnica Mechanical Engineering, 62 (2018) 2, pp. 126-135
- Amraoui, M. A., Numerical Study of an Air-flow in a Flat Plate Air Solar Collector with Circular Obstacles, In International Conference in Artificial Intelligence in Renewable Energetic Systems, Springer, Cham, Switzerland, 2020, pp. 839-846
- Amraoui, M. A., The 3-D Numerical Simulation of a Flat Plate Solar Collector with Double Paths, Int. Journal of Heat and Technology, 39 (2021) 4, pp. 1087-1096
- Amraoui, M. A., Benosman, F., Numerical Modelling of a Flat Air Solar Collector Fitted with Obstacles, Proceedings, E3S Web of Conferences, 2021, Vol. 321, 04016
- Miyake, Y., et al., Direct Numerical Simulation of Rough-Wall Heat Transfer in A Turbulent Channel Flow, Int. Journal of Heat and Fluid-Flow, 22 (2001) 3, pp. 237-244
- Ansari, M., Bazargan, M., Optimization of Flat Plate Solar Air Heaters with Ribbed Surfaces, Applied Thermal Engineering, 136 (2018), May, pp. 356-363
- Kumar, R., et al., A parametric Analysis of Rectangular Rib Roughened Triangular Duct Solar Air Heater Using Computational Fluid Dynamics, Solar Energy, 157 (2017), Nov., pp. 1095-1107
- Alam, T., et al., Heat Transfer Enhancement in Solar Air Heater Duct with Conical Protrusion Roughness Ribs, Applied Thermal Engineering, 126 (2017), Nov., pp. 458-469
- Skullong, S., et al., Heat Transfer Augmentation in a Solar Air Heater Channel with Combined Winglets and Wavy Grooves on Absorber Plate, Applied Thermal Engineering, 122 (2017), July, pp. 268-284
- Deo, N. S., et al., Performance Analysis of Solar Air Heater Duct Roughened with Multigap V-Down Ribs Combined with Staggered Ribs, Renewable Energy, 91 (2016), June, pp. 484-500
- Demartini, L. C., et al., Numeric and Experimental Analysis of The Turbulent Flow Through a Channel with Baffle Plates, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 26 (2004), 2, pp. 153-159
- Launder, B. E., Spalding, D. B., The Numerical Computation of Turbulent Flow, Computer Methods in Applied Mechanics and Engineering, 3 (1974), 2, pp. 269-289
- Yang, Y. T., Hwang, C. Z., Calculation of Turbulent Flow and Heat Transfer in a Porous-Baffled Channel, Int. Journal of Heat and Mass Transfer, 46 (2003), 5, pp. 771-780
- Siddiqui, M. K., Heat Transfer Augmentation in a Heat Exchanger Tube Using a Baffle, Int. Journal of Heat and Fluid-Flow, 28 (2007), 2, pp. 318-328
- Dutta, P., Hossain, A., Internal Cooling Augmentation in Rectangular Channel Using Two Inclined Baffles, Int. Journal of Heat and Fluid-Flow, 26 (2005), 2, pp. 223-232
- Patankar, S. V., Numerical Heat Transfer and Fluid-Flow, McGraw-Hill, New York, USA, 1980
- Leonard, B. P., Mokhtari, S., Ultra-Sharp Non-Oscillatory Convection Schemes for High-Speed Steady Multidimensional Flow, NASA TM 1-2568, NASA Lewis Research Center, Cleveland, O., USA, 1990
- Menni, S., Belabbaci, F., Study of the Dynamic Structure of Turbulent Flow around an Obstacle: Effect of Thermal Stratification, Etude des écoulements turbulents autours d'un obstacle: effet de la rugosité couplé à l'inclinaison (in French), M. Sc. thesis, Université Aboubakr Belkaïd-Tlemcen, 2022
