Numerical investigation to augmentation of heat transfer in solar air heater with arc shape ribs on absorber plate

Year 2025, Volume: 11 Issue: 1, 25 - 39, 31.01.2025

Gaith Monem Fadala Ahmed Hashem Yousef Karrar S. Hasan

Abstract

Using numerical methods, this paper investigates the heat transmission and friction factor of a SAH duct that has been intentionally roughened. The absorber plate of the duct is equipped with an arc-shaped structure that has three distinct angles of attack. This structure is Installed on the peak walls from the tray. The roughness parameters of this structure include a respective roughness factor (p/H) beginning from from 1.667 to 6.667, a respective rough height (e/H) of 0.271, an arc angle (α) beginning from from 30° to 60°, and a Re beginning from from 3000 to 15000. It has been determined that the efficiency of roughened SAH ducts surpasses that of smooth ducts within the range of roughness values examined. The numerical analysis indicates that the highest increase in Nu and f occurred at specific values: a respective roughness factor (p/H) of 3.33, a respective roughness height (e/H) of 0.271, an arc angle (α) of 60°, and a Reynolds number of 15000. The test runs for the roughened duct involved collecting data on various combinations of roughness parameters. The highest values observed were Nu = 215 and Nu ratio = 7.21. When compared to the conduit that is smooth had most possible value of f = 2.5 and f/fs = 3.39. The thermal performance factor is 3.88.

Keywords

Artificial Roughness, CFD, Fluid Flow, Heat Transfer, Solar Air Heater, Solar Energy

References

• [1] Hasan KS, Khwayyir HHS, Abd Al-Wahid WA. Experimental investigation of the flame stability map (operating window) by using a tangential swirl burner for the confinement and unconfinement space. IOP Conf Ser Mater Sci Eng 2020;928:022016. [CrossRef]
• [2] Hasan KS. Study operation of steam generation system using different fuels [dissertation]. Al-Furat Al-Awsat Technical University; 2020.
• [3] Kannan N, Vakeesan D. Solar energy for future world: A review. Renew Sustain Energy Rev 2016;62:1092–1105. [CrossRef]
• [4] Yousif AH, Khudhair MR. Enhancement heat transfer in a tube fitted with passive technique as twisted tape insert-A comprehensive review. Am J Mech Eng 2019;7:20–34.
• [5] Yousif A. Numerical analysis for flow and heat transfer in new shapes of corrugated channels. J Babylon Univ Sci. 2015;23:126191925.
• [6] Yousif AH. An effect of orientation on heat transfer characteristic from triangular cylinder by using winglets. Int J Mech Prod Eng Res Dev 2018;9:119–130. [CrossRef]
• [7] Sachdev T, Vivek G, Tiwari A. Comparative thermal analysis of applications using novel solar air heater with u-shaped longitudinal fins: suitable for coastal regions. J Therm Eng 2021;7:1174–1183. [CrossRef]
• [8] Yıldırım C. Theoretical investigation of a solar air heater roughened by ribs and grooves. J Therm Eng 2018;4:1702–1712. [CrossRef]
• [9] Garg HP. Solar energy: Fundamentals and applications. Tata McGraw-Hill Education; 2000.
• [10] Jovini M, Khoshvaght-Aliabadi M, Sardarabadi M. Experimental study of utilizing springs on absorber plate of solar air heaters: Subjected to axial-flow and cross-flow. Sustain Energy Technol Assess 2022;53:102661. [CrossRef]
• [11] Ifrim VC, Pop T. Review of thermal performance enhancement of solar air heater using shapes on absorber plate. 2022 International Conference on Development and Application Systems (DAS) 2022:19–27. [CrossRef]
• [12] Alam T, Meena CS, Balam NB, Kumar A, Cozzolino R. Thermo-hydraulic performance characteristics and optimization of protrusion rib roughness in solar air heater. Energies 2021;14:3159. [CrossRef]
• [13] Kumar A, Saini RP, Saini JS. Heat and fluid flow characteristics of roughened solar air heater ducts–A review. Renew Energy 2012;47:77–94. [CrossRef]
• [14] Hans VS, Saini RP, Saini JS. Performance of artificially roughened solar air heaters—A review. Renew Sustain Energy Rev 2009;13:1854–1869. [CrossRef]
• [15] Bhushan B, Singh R. A review on methodology of artificial roughness used in duct of solar air heaters. Energy 2010;35:202–212. [CrossRef]
• [16] Chand NV, Kumar V, Sehgal AK. An analysis of a duct with different vortex generators for performance enhancement of a solar air heater: Computational fluid dynamics (CFD) BT. Adv Fluid Ther Eng 2019:637–645. [CrossRef]
• [17] Yadav AS, Sharma A. Experimental investigation on heat transfer enhancement of artificially roughened solar air heater. Heat Transf Eng 2022:1–14. [CrossRef]
• [18] Jin D, Quan S, Zuo J, Xu S. Numerical investigation of heat transfer enhancement in a solar air heater roughened by multiple V-shaped ribs. Renew Energy 2019;134:78–88. [CrossRef]
• [19] Luo L, Wen F, Wang L, Sundén B, Wang S. On the solar receiver thermal enhancement by using the dimple combined with delta winglet vortex generator. Appl Therm Eng 2017;111:586–598. [CrossRef]
• [20] Tamna S, Skullong S, Thianpong C, Promvonge P. Heat transfer behaviors in a solar air heater channel with multiple V-baffle vortex generators. Sol Energy 2014;110:720–735. [CrossRef]
• [21] Fadala GM, Yousef AH. The effect of artificial roughness on performance of solar air heater (SAH): A review study. AIP Conf Proc 2023;2776:50008. [CrossRef]
• [22] Zhang L, et al. Heat transfer enhancement by streamlined winglet pair vortex generators for helical channel with rectangular cross section. Chem Eng Process Intensif 2020;147:107788. [CrossRef]
• [23] Gupta A, Roy A, Gupta S, Gupta M. Numerical investigation towards implementation of punched winglet as vortex generator for performance improvement of a fin-and-tube heat exchanger. Int J Heat Mass Transf 2020;149:119171. [CrossRef]
• [24] Li M, Qu J, Zhang J, Wei J, Tao W. Air side heat transfer enhancement using radiantly arranged winglets in fin-and-tube heat exchanger. Int J Therm Sci 2020;156:106470. [CrossRef]
• [25] Promvonge P, Skullong S. Thermo-hydraulic performance in heat exchanger tube with V-shaped winglet vortex generator. Appl Therm Eng 2020;164:114424. [CrossRef]
• [26] Bergman TL, Incropera FP, Dewitt DP, Lavine AS. Fundamentals of Heat and Mass Transfer. John Wiley & Sons; 2011.
• [27] Lam CK, Bremhorst K. A modified form of the k-ε model for predicting wall turbulence. J Fluids Eng 1981;103(3):456–460. [CrossRef]
• [28] Versteeg HK, Malalasekera W. An Introduction to Computational Fluid Dynamics: The Finite Volume Method. Pearson Education; 2007.
• [29] Varun, Saini RP, Singal SK. Investigation of thermal performance of solar air heater having roughness elements as a combination of inclined and transverse ribs on the absorber plate. Renew Energy 2008;33:1398–1405. [CrossRef]
• [30] Incropera FP, Dewitt DP, Bergman TL, Lavine AS. Introduction to Heat Transfer. John Wiley & Sons; 1996. pp. 280–284.
• [31] Lewis MJ. Optimising the thermohydraulic performance of rough surfaces. Int J Heat Mass Transf 1975;18:1243–1248. [CrossRef]
• [32] Pandey NK, Bajpai VK, Varun. Heat transfer and friction factor study of a solar air heater having multiple arcs with gap-shaped roughness element on absorber plate. Arab J Sci Eng 2016;41:4517–4530. [CrossRef]
• [33] Singh AP, Varun, Siddhartha. Heat transfer and friction factor correlations for multiple arc shape roughness elements on the absorber plate used in solar air heaters. Exp Therm Fluid Sci 2014;54:117–126. [CrossRef]
• [34] Singh S, Chander S, Saini JS. Heat transfer and friction factor correlations of solar air heater ducts artificially roughened with discrete V-down ribs. Energy 2011;36:5053–5064. [CrossRef]
• [35] Kumar R, Goel V, Singh P, Saxena A, Kashyap AS, Rai A. Performance evaluation and optimization of solar assisted air heater with discrete multiple arc shaped ribs. J Energy Storage 2019;26:100978. [CrossRef]