International Scientific Journal


This paper presents two methods (theoretical and numerical) for the thermal analysis of the previously experimentally installed solar collector construction at the Faculty of Engineering in Kragujevac – a fixed flat-plate solar collector with Sn-Al2O3 selective absorber and gravity water flow. The theoretical research was based on the application of a specific calculation algorithm with a triple iterative procedure, i.e. with a three-stage check of all important performance indicators of the fixed flat-plate solar collector. In the numerical phase of the research, simple linear regression was applied to experimentally measured values of solar radiation intensity and experimentally determine values of heat power to form simple equations that could be used to predict the thermal performance of similar solar structures in the future. The results of theoretical and numerical studies showed agreement with experimental studies, because in the first case, the absolute measurement error was less than 10%, while in the second case, the determination coefficient was greater than 90%, so the authors hope that this work will be useful to the wider scientific community.
PAPER REVISED: 2023-03-09
PAPER ACCEPTED: 2023-04-05
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THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 5, PAGES [3687 - 3700]
  1. Ibrahim, A., Kocak, S., Theoretical Energy and Exergy Analyses of Solar Assisted Heat Pump Space Heating System, Thermal Science, 18 (2014), Suppl. 2, pp. S417-S427
  2. Solanki, A., Yash, P., Applications of a Flat Plate Collector in Dairy Industries: A Review, International Journal of Ambient Energy, 43 (2022), 1, pp. 1915-1923
  3. Nešović, A., Theoretical Model of Solar Incident Angle for an Optionally Oriented Fixed Flat Surface, Technique, 77 (2022), 3, pp. 328-333
  4. Wazwaz, A., et al., Solar Thermal Performance of a Nickel-Pigmented Aluminum Oxide Selective Absorber, Renewable Energy, 27 (2002), 2, pp. 277-292
  5. Wazwaz, A., et al., The Effects of Nickel-Pigmented Aluminum Oxide Selective Coating over Aluminum Alloy on the Optical Properties and Thermal Efficiency of the Selective Absorber Prepared by Alternate and Reverse Periodic Plating Technique, Energy Conversion and Management, 51 (2010), 8, pp. 1679-1683
  6. Li, Z., et al., Aqueous Solution-Chemical Derived Ni-Al2O3 Solar Selective Absorbing Coatings, Solar Energy Materials and Solar Cells, 105 (2012), Oct., pp. 90-95
  7. Xue, Y., et al., Spectral Properties and Thermal Stability of Solar Selective Absorbing AlNi-Al2O3 cermet coating, Solar Energy, 96 (2013), Oct., pp. 113-118
  8. Teixeira, V., et al., Spectrally Selective Composite Coatings of Cr-Cr2O3 and Mo-Al2O3 for Solar Energy Applications, Thin Solid Films, 392 (2001), 2, pp. 320-326
  9. Xinkang, D., et al., Microstructure and Spectral Selectivity of Mo-Al2O3 Solar Selective Absorbing Coatings after Annealing, Thin Solid Films, 516 (2008), 12, pp. 3971-3977
  10. Antonaia, A., et al., Stability of W-Al2O3 Cermet Based Solar Coating for Receiver Tube Operating at High Temperature, Solar Energy Materials and Solar Cells, 94 (2010), 10, pp. 1604-1611
  11. Ding, D., et al., Optical, Structural and Thermal Characteristics of Cu-CuAl2O4 Hybrids Deposited in Anodic Aluminum Oxide as Selective Solar Absorber, Solar Energy Materials and Solar Cells, 94 (2010), 10, pp. 1578-1581
  12. Nuru, Z. Y., et al., Pt-Al2O3 Nanocoatings for High Temperature Concentrated Solar Thermal Power Applications, Physica B: Condensed Matter, 407 (2012), 10, pp. 1634-1637
  13. Barshilia, H. C., et al., Structure and Optical Properties of Ag-Al2O3 Nanocermet Solar Selective Coatings Prepared Using Unbalanced Magnetron Sputtering, Solar Energy Materials and Solar Cells, 95 (2011), 7, pp. 1707-1715
  14. Chorchong, T., et al., Characterization and Spectral Selectivity of Sn-Al2O3 Solar Absorber, Key Engineering Materials, 675-676 (2016), Aug., pp. 467-472
  15. Wamae, W., et al., Influence of Tin Content on Spectral Selectivity and Thermal Conductivity of Sn-Al2O3 Solar Selective Absorber, Materials for Renewable and Sustainable Energy, 7 (2018), Jan., pp. 1-8
  16. Wamae, W., et al., Thermal Efficiency of a New Prototype of Evacuated Tube Collector Using Sn-Al2O3 as a Selective Solar Absorber, Walailak Journal of Science and Technology, 15 (2018), 11, pp. 793-802
  17. Alvarez, A., et al., Experimental and Numerical Investigation of a Flat-Plate Solar Collector, Energy, 35 (2010), 9, pp. 3707-3716
  18. Hellstrom, B., et al., The Impact of Optical and Thermal Properties on the Performance of Flat Plate Solar Collectors, Renewable Energy, 28 (2003), 3, pp. 331-344
  19. Shemelin, V., Matuska, T., Detailed Modelling of Flat Plate Solar Collector with Vacuum Glazing, International Journal of Photoenergy, 2017 (2017), ID1587592
  20. Khoukhi, M., et al., Flat-Plate Solar Collector Performance with Coated and Uncoated Glass Cover, Heat Transfer Engineering, 27 (2006), 1, pp. 46-53
  21. Akhtar, N., Mullick, S. C., Computation of Glass-Cover Temperatures and Top Heat Loss Coefficient of Flat-Plate Solar Collectors with Double Glazing, Energy, 32 (2007), 7, pp. 1067-1074
  22. Subiantoro, A., Ooi, K. T., Analytical Models for the Computation and Optimization of Single and Double Glazing Flat Plate Solar Collectors with Normal and Small Air Gap Spacing, Applied Energy, 104 (2013), Apr., pp. 392-399
  23. Chen, C. Q., et al., Numerical Evaluation of the Thermal Performance of Different Types of Double Glazing Flat-Plate Solar Air Collectors, Energy, 233 (2021), 21087
  24. Vettrivel, H., Mathiazhagan, P., Comparison Study of Solar Flat Plate Collector with Single and Double Glazing Systems, International Journal of Renewable Energy Research, 7 (2017), 1, pp. 266-274
  25. Baccoli, R., et al., A Mathematical Model of a Solar Collector Augmented by a Flat Plate above Reflector: Optimum Inclination of Collector and Reflector, Energy Procedia, 81 (2015), Dec., pp. 205-214
  26. Baccoli, R., et al., A Comprehensive Optimization Model for Flat Solar Collector Coupled with a Flat Booster Bottom Reflector Based on an Exact Finite Length Simulation Model, Energy Conversion and Management, 164 (2018), May, pp. 482-507
  27. Chiam, H. F., Planar Concentrators for Flat-Plate Solar Collectors, Solar Energy, 26 (1981), 6, pp. 503-509
  28. Larson, D. C., Mirror Enclosures for Double-Exposure Solar Collectors, Solar Energy, 23 (1979), 6, pp. 517-524
  29. Nikolić, N., Lukić, N., A Mathematical Model for Determining the Optimal Reflector Position of a Double Exposure Flat-Plate Solar Collector, Renewable Energy, 51 (2013), Mar., pp. 292-301
  30. Maia, C. B., et al., Evaluation of a Tracking Flat-Plate Solar Collector in Brazil, Applied Thermal Engineering, 73 (2014), 1, pp. 953-962
  31. Neville, R. C., Solar Energy Collector Orientation and Tracking Mode, Solar Energy, 20 (1978), 1, pp. 7-11
  32. Drago, P., A Simulated Comparison of the Useful Energy Gain in a Fixed and a Fully Tracking Flat Plate Collector, Proceedings, International Symposium - Workshop on Solar Energy, Cairo, Egypt, 1980, Vol., pp. 258-273
  33. Attalage, R. A., Agami, R. T., Annual Collectible Energy of a Two-Axis Tracking Flat-Plate Solar Collector, Solar Energy, 48 (1992), 3, pp. 151-155
  34. Nešović, A., et al., Experimental Analysis of the Fixed Flat-Plate Solar Collector with Sn-Al2O3 Selective Absorber and Gravity Water Flow, Thermal Science, 27 (2023), 1A, pp. 349-358
  35. Beckman, W. A., et al., Solar Heating Design, by the F-Chart Method, NASA STI/Recon Technical Report A, 78 (1977), 31071
  36. Mehregan, M., et al., Energy, Economic, Environmental Investigations and Optimization of a Combined Cooling, Heating and Power System with Hybrid Prime Mover of Gas Engine and Flat Plate Solar Collector, Energy Conversion and Management, 251 (2022), 115018
  37. Rabl, A., Active Solar Collectors and Their Applications, Oxford University Press on Demand, Oxford, UK, 1985
  38. Kalogirou, S. A., Solar Thermal Collectors and Applications, Progress in Energy and Combustion Science, 30 (2004), 3, pp. 231-295
  39. Stine, W. B., Harrigan, R. W., Solar Energy Fundamentals and Design, Wiley-Interscience, New York, USA, 1985
  40. Wang, D., et al., Thermal Performance Analysis of Large-Scale Flat Plate Solar Collectors and Regional Applicability in China, Energy, 238 (2022), 121931
  41. Ali, S. H., et al., Energetic and Exegetic Performance Analysis of Flat Plate Solar Collector under Variables Heat Transfer Coefficient and Inlet Water Temperature, Case Studies in Thermal Engineering, 28 (2021), 101700
  42. Jurišević, N., System for Monitoring and Targeting of Energy and Water Consumption in Pubic Buildings, Ph. D. thesis, University of Kragujevac, Kragujevac, Serbia, 2021

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence